使用文件 Spring 中定义的名称 'postsController' 创建 bean 时出错 Boot
Error creating bean with name 'postsController' defined in file Spring Boot
当我 运行 我的 spring 启动应用程序时出现错误。
我的 pom.xml :
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.project</groupId>
<artifactId>blog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>blog</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
-->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
我的 PostsController class:
package com.project.blog.controllers;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.project.blog.entities.Posts;
import com.project.blog.requests.PostCreateRequest;
import com.project.blog.services.PostsService;
@RestController
@RequestMapping("/post")
public class PostsController {
private PostsService postsService;
@Autowired
public PostsController(PostsService postsService) {
this.postsService = postsService;
}
@PostMapping
public Posts savePost(@RequestBody PostCreateRequest postReq) {
return postsService.createOnePost(postReq);
}
@GetMapping
public List<Posts> getAllPosts(){
return postsService.getAllPosts();
}
}
我的帖子实体：
package com.project.blog.entities;
import javax.persistence.*;
import lombok.Data;
@Entity
@Table(name = "posts")
@Data
public class Posts {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
long id;
String title;
@Lob
@Column(columnDefinition = "text")
String post;
@ManyToOne(cascade= {CascadeType.DETACH,CascadeType.MERGE,CascadeType.PERSIST,CascadeType.REFRESH})
@JoinColumn(name="userid")
User user;
}
我的 PostRepository :
package com.project.blog.repositories;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.project.blog.entities.Posts;
public interface PostsRepository extends JpaRepository<Posts, Long> {
}
我的邮政服务：
package com.project.blog.services;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.project.blog.entities.Posts;
import com.project.blog.entities.User;
import com.project.blog.repositories.PostsRepository;
import com.project.blog.repositories.UserRepository;
import com.project.blog.requests.PostCreateRequest;
@Service
public class PostsService {
private PostsRepository postsRepository;
private UserRepository userRepository;
@Autowired
public PostsService(PostsRepository postsRepository,UserRepository userRepository) {
this.postsRepository = postsRepository;
this.userRepository = userRepository;
}
public List<Posts> getAllPosts(){
return postsRepository.findAll();
}
public Posts createOnePost(PostCreateRequest postReq) {
User user = userRepository.findById(postReq.getUserid()).orElse(null);
if(user == null) {
return null;
}
Posts post = new Posts();
post.setPost(postReq.getPost());
post.setTitle(postReq.getTitle());
post.setUser(user);
return postsRepository.save(post);
}
public void deletePostById(Long id) {
postsRepository.deleteById(id);
}
}
我在控制台上的错误消息：
ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsController' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/controllers/PostsController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
2022-05-31 00:26:29.796 INFO 2480 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2022-05-31 00:26:29.799 INFO 2480 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2022-05-31 00:26:29.808 INFO 2480 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2022-05-31 00:26:29.810 INFO 2480 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-05-31 00:26:29.821 INFO 2480 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-05-31 00:26:29.841 ERROR 2480 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsController' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/controllers/PostsController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
at com.project.blog.BlogApplication.main(BlogApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.7.0.jar:2.7.0]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.20.jar:5.3.20]
... 24 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.20.jar:5.3.20]
... 38 common frames omitted
Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:106) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$mapMethodsToQuery(QueryExecutorMethodInterceptor.java:94) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:197) ~[na:na]
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) ~[na:na]
at java.base/java.util.Collections$UnmodifiableCollection.forEachRemaining(Collections.java:1061) ~[na:na]
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na]
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:96) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new[=17=](QueryExecutorMethodInterceptor.java:86) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.Optional.map(Optional.java:260) ~[na:na]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:86) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:364) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet(RepositoryFactoryBeanSupport.java:322) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.util.Lazy.getNullable(Lazy.java:230) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.util.Lazy.get(Lazy.java:114) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:328) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.20.jar:5.3.20]
... 49 common frames omitted
Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:96) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:113) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:254) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:87) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:102) ~[spring-data-commons-2.7.0.jar:2.7.0]
... 71 common frames omitted
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'findbyUserName' found for type 'User'!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:437) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:413) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.lambda$from[=17=](PropertyPath.java:366) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:348) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:331) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new[=17=](PartTree.java:249) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:197) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:179) ~[na:na]
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na]
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:384) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:92) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:89) ~[spring-data-jpa-2.7.0.jar:2.7.0]
... 75 common frames omitted
我也有用户并且喜欢实体控制器服务和 jpa 存储库。我做错了什么你能帮帮我吗？我是新手 spring boot.
我建议首先使用 @Repository 标记注释您的存储库。
并且查看您的错误消息，似乎它在使用 UserRepository 时遇到了问题，您可能需要从那里开始查看。
再看异常
Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User
com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
您正在尝试使用 spring 不存在或无效的数据查询
错误在 UserRepository
Optional<User> findByUserName(String name);
or
Optional<User> findBy<FieldNameInCamelCase>(String name);
感谢大家的帮助，我通过将 findbyUserName 替换为 findByUsername 解决了这个问题，现在可以使用了
当我 运行 我的 spring 启动应用程序时出现错误。
我的 pom.xml :
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.project</groupId>
<artifactId>blog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>blog</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
-->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
我的 PostsController class:
package com.project.blog.controllers;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.project.blog.entities.Posts;
import com.project.blog.requests.PostCreateRequest;
import com.project.blog.services.PostsService;
@RestController
@RequestMapping("/post")
public class PostsController {
private PostsService postsService;
@Autowired
public PostsController(PostsService postsService) {
this.postsService = postsService;
}
@PostMapping
public Posts savePost(@RequestBody PostCreateRequest postReq) {
return postsService.createOnePost(postReq);
}
@GetMapping
public List<Posts> getAllPosts(){
return postsService.getAllPosts();
}
}
我的帖子实体：
package com.project.blog.entities;
import javax.persistence.*;
import lombok.Data;
@Entity
@Table(name = "posts")
@Data
public class Posts {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
long id;
String title;
@Lob
@Column(columnDefinition = "text")
String post;
@ManyToOne(cascade= {CascadeType.DETACH,CascadeType.MERGE,CascadeType.PERSIST,CascadeType.REFRESH})
@JoinColumn(name="userid")
User user;
}
我的 PostRepository :
package com.project.blog.repositories;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.project.blog.entities.Posts;
public interface PostsRepository extends JpaRepository<Posts, Long> {
}
我的邮政服务：
package com.project.blog.services;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.project.blog.entities.Posts;
import com.project.blog.entities.User;
import com.project.blog.repositories.PostsRepository;
import com.project.blog.repositories.UserRepository;
import com.project.blog.requests.PostCreateRequest;
@Service
public class PostsService {
private PostsRepository postsRepository;
private UserRepository userRepository;
@Autowired
public PostsService(PostsRepository postsRepository,UserRepository userRepository) {
this.postsRepository = postsRepository;
this.userRepository = userRepository;
}
public List<Posts> getAllPosts(){
return postsRepository.findAll();
}
public Posts createOnePost(PostCreateRequest postReq) {
User user = userRepository.findById(postReq.getUserid()).orElse(null);
if(user == null) {
return null;
}
Posts post = new Posts();
post.setPost(postReq.getPost());
post.setTitle(postReq.getTitle());
post.setUser(user);
return postsRepository.save(post);
}
public void deletePostById(Long id) {
postsRepository.deleteById(id);
}
}
我在控制台上的错误消息：
ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsController' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/controllers/PostsController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
2022-05-31 00:26:29.796 INFO 2480 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2022-05-31 00:26:29.799 INFO 2480 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2022-05-31 00:26:29.808 INFO 2480 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2022-05-31 00:26:29.810 INFO 2480 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-05-31 00:26:29.821 INFO 2480 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-05-31 00:26:29.841 ERROR 2480 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsController' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/controllers/PostsController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
at com.project.blog.BlogApplication.main(BlogApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.7.0.jar:2.7.0]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postsService' defined in file [/Users/erdemoden/Desktop/Spring-Boot/blog/target/classes/com/project/blog/services/PostsService.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.20.jar:5.3.20]
... 24 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.project.blog.repositories.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=17=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.20.jar:5.3.20]
... 38 common frames omitted
Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! Reason: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:106) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$mapMethodsToQuery(QueryExecutorMethodInterceptor.java:94) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:197) ~[na:na]
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) ~[na:na]
at java.base/java.util.Collections$UnmodifiableCollection.forEachRemaining(Collections.java:1061) ~[na:na]
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na]
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:96) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new[=17=](QueryExecutorMethodInterceptor.java:86) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.Optional.map(Optional.java:260) ~[na:na]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:86) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:364) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet(RepositoryFactoryBeanSupport.java:322) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.util.Lazy.getNullable(Lazy.java:230) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.util.Lazy.get(Lazy.java:114) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:328) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.20.jar:5.3.20]
... 49 common frames omitted
Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:96) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:113) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:254) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:87) ~[spring-data-jpa-2.7.0.jar:2.7.0]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:102) ~[spring-data-commons-2.7.0.jar:2.7.0]
... 71 common frames omitted
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'findbyUserName' found for type 'User'!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:437) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:413) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.lambda$from[=17=](PropertyPath.java:366) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:348) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:331) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new[=17=](PartTree.java:249) ~[spring-data-commons-2.7.0.jar:2.7.0]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:197) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:179) ~[na:na]
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na]
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na]
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:384) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:92) ~[spring-data-commons-2.7.0.jar:2.7.0]
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:89) ~[spring-data-jpa-2.7.0.jar:2.7.0]
... 75 common frames omitted
我也有用户并且喜欢实体控制器服务和 jpa 存储库。我做错了什么你能帮帮我吗？我是新手 spring boot.
我建议首先使用 @Repository 标记注释您的存储库。
并且查看您的错误消息，似乎它在使用 UserRepository 时遇到了问题，您可能需要从那里开始查看。
再看异常
Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract com.project.blog.entities.User
com.project.blog.repositories.UserRepository.findbyUserName(java.lang.String)! No property 'findbyUserName' found for type 'User'!
您正在尝试使用 spring 不存在或无效的数据查询
错误在 UserRepository
Optional<User> findByUserName(String name);
or
Optional<User> findBy<FieldNameInCamelCase>(String name);
感谢大家的帮助，我通过将 findbyUserName 替换为 findByUsername 解决了这个问题，现在可以使用了