我在使用 JpaRepository 创建一个简单的 Spring 引导项目时遇到 NoSuchBeanDefinitionexception
I am getting NoSuchBeanDefinitionexception while creating a simple Spring Boot project with JpaRepository
我正在使用 JpaRepository 创建一个简单的 Spring 引导应用程序，但是当我尝试 运行 我的应用程序时，它给出了一个错误 "NoSuchBeanDefinitionException"。我是 Spring Boot 的新手。
我也尝试用@SpringBootApplication 注释我的主要 class
@EnableJpaRepositories("com.ab.repository") 注释，但每当我尝试注释 @EnableJpaRepository() 时，它在 STS 中显示
错误
The type org.springframework.data.repository.config.BootstrapMode cannot be resolved. It is indirectly referenced from required .class files.
以前我没有使用这个注释，但我在一个问题中看到我必须告诉我的 class 启用 JPA 存储库，所以我也尝试了这个，但它也不起作用。
我的主要class
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootMain {
public static void main(String[] args) {
SpringApplication.run(SpringBootMain.class, args);
}
}
控制器 Class 是：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import com.ab.model.WebServiceModel;
import com.ab.service.WebSrvService;
@RestController
public class WebServiceController {
@Autowired
private WebSrvService webSrvService;
@PostMapping(value = "/save")
public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
webSrvService.saveRecord(webServiceModel);
}
}
服务class：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;
@Service
public class WebSrvService {
@Autowired
private WebServiceRepository webServiceRepository;
public void saveRecord(WebServiceModel webServiceModel) {
webServiceRepository.save(webServiceModel);
}
}
存储库接口：
import org.springframework.data.jpa.repository.JpaRepository;
import com.ab.model.WebServiceModel;
public interface WebServiceRepository extends JpaRepository<WebServiceModel, Integer> {
}
我的 pom.xml 文件是：
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ab</groupId>
<artifactId>SpringBootTry</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.1.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.10.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.2.18.RELEASE</version>
</dependency>
</dependencies>
</project>
请纠正我做错了什么，我希望它正确 运行 但我收到一条错误消息：
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ab.repository.WebServiceRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
删除“@Repository”，也许你可以
在查看了您在 github 上发布的代码后，我正确地提取了它，因此您的依赖项存在问题。您缺少包含 jar 中所有依赖项的 spring 构建插件。
开始新项目时始终使用 Spring initlizr，它会自动为您设置所有这些（除非您对 spring 有很好的经验并且知道自己在做什么）。
全力以赴pom.xml
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ab</groupId>
<artifactId>SpringBootTry</artifactId>
<version>0.0.1-SNAPSHOT</version>
// latest version of spring as of writing 2.1.7
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
</parent>
// set what version you want of java 1.8, 9, 10, 11, 12?
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
// You need the spring plugin to bild a fat jar that includes all
// the dependencies. Without this, no dependencies are included in
// the jar and you get NoSuchBeanDefinitionexception
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
您还需要更新您的应用程序属性
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
否则你会在启动服务器时收到警告。
I created both the folder structure and code like yours.
package com.ab;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootTry1Application {
public static void main(String[] args) {
SpringApplication.run(SpringBootTry1Application.class, args);
}
}
Why you change your main class name?Spring boot automatically create main class for you.
package com.ab.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import com.ab.model.WebServiceModel;
import com.ab.service.WebService;
@Controller
public class WebServiceController {
@Autowired
private WebService webSrvService;
@PostMapping(value = "/save")
public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
webSrvService.saveRecord(webServiceModel);
}
}
package com.ab.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;
@Service
public class WebService {
@Autowired
private WebServiceRepository webServiceRepository;
public void saveRecord(WebServiceModel webServiceModel) {
webServiceRepository.save(webServiceModel);
}
}
package com.ab.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import com.ab.model.WebServiceModel;
public interface WebServiceRepository extends JpaRepository<WebServiceModel,Integer>{
}
## LOGS ##
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.7.RELEASE)
2019-09-01 18:26:27.412 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : Starting SpringBootTry1Application on BGINMAC004.local with PID 5522 (/Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1/target/classes started by Dildeep.Singh in /Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1)
2019-09-01 18:26:27.414 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : No active profile set, falling back to default profiles: default
2019-09-01 18:26:27.992 INFO 5522 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-09-01 18:26:28.055 INFO 5522 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 57ms. Found 1 repository interfaces.
2019-09-01 18:26:28.354 INFO 5522 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$d03f4e2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-09-01 18:26:28.583 INFO 5522 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-09-01 18:26:28.602 INFO 5522 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-09-01 18:26:28.603 INFO 5522 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.22]
2019-09-01 18:26:28.692 INFO 5522 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-09-01 18:26:28.692 INFO 5522 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1250 ms
2019-09-01 18:26:28.839 INFO 5522 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2019-09-01 18:26:28.937 INFO 5522 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2019-09-01 18:26:28.981 INFO 5522 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2019-09-01 18:26:29.141 INFO 5522 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.3.10.Final}
2019-09-01 18:26:29.142 INFO 5522 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2019-09-01 18:26:29.228 INFO 5522 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-09-01 18:26:29.316 INFO 5522 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2019-09-01 18:26:29.743 INFO 5522 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@3850e90c'
2019-09-01 18:26:29.746 INFO 5522 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-09-01 18:26:30.149 INFO 5522 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-09-01 18:26:30.210 WARN 5522 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2019-09-01 18:26:30.417 INFO 5522 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-09-01 18:26:30.420 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : Started SpringBootTry1Application in 18.317 seconds (JVM running for 23.971)
2019-09-01 18:41:39.601 INFO 5522 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-09-01 18:41:39.602 INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2019-09-01 18:41:39.615 INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 13 ms
2019-09-01 18:47:48.219 WARN 5522 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=6m18s959ms).
我的代码编译正常。
尝试从 STS 创建新的 spring 启动项目，不要触摸 spring boot main class 并从 here.Your 复制相同的文件夹结构代码肯定会编译。
我正在使用 JpaRepository 创建一个简单的 Spring 引导应用程序，但是当我尝试 运行 我的应用程序时，它给出了一个错误 "NoSuchBeanDefinitionException"。我是 Spring Boot 的新手。
我也尝试用@SpringBootApplication 注释我的主要 class
@EnableJpaRepositories("com.ab.repository") 注释，但每当我尝试注释 @EnableJpaRepository() 时，它在 STS 中显示
The type org.springframework.data.repository.config.BootstrapMode cannot be resolved. It is indirectly referenced from required .class files.
以前我没有使用这个注释，但我在一个问题中看到我必须告诉我的 class 启用 JPA 存储库，所以我也尝试了这个，但它也不起作用。
我的主要class
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootMain {
public static void main(String[] args) {
SpringApplication.run(SpringBootMain.class, args);
}
}
控制器 Class 是：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import com.ab.model.WebServiceModel;
import com.ab.service.WebSrvService;
@RestController
public class WebServiceController {
@Autowired
private WebSrvService webSrvService;
@PostMapping(value = "/save")
public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
webSrvService.saveRecord(webServiceModel);
}
}
服务class：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;
@Service
public class WebSrvService {
@Autowired
private WebServiceRepository webServiceRepository;
public void saveRecord(WebServiceModel webServiceModel) {
webServiceRepository.save(webServiceModel);
}
}
存储库接口：
import org.springframework.data.jpa.repository.JpaRepository;
import com.ab.model.WebServiceModel;
public interface WebServiceRepository extends JpaRepository<WebServiceModel, Integer> {
}
我的 pom.xml 文件是：
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ab</groupId>
<artifactId>SpringBootTry</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.1.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.10.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.2.18.RELEASE</version>
</dependency>
</dependencies>
</project>
请纠正我做错了什么，我希望它正确 运行 但我收到一条错误消息：
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ab.repository.WebServiceRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
删除“@Repository”，也许你可以
在查看了您在 github 上发布的代码后，我正确地提取了它，因此您的依赖项存在问题。您缺少包含 jar 中所有依赖项的 spring 构建插件。
开始新项目时始终使用 Spring initlizr，它会自动为您设置所有这些（除非您对 spring 有很好的经验并且知道自己在做什么）。
全力以赴pom.xml
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ab</groupId>
<artifactId>SpringBootTry</artifactId>
<version>0.0.1-SNAPSHOT</version>
// latest version of spring as of writing 2.1.7
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
</parent>
// set what version you want of java 1.8, 9, 10, 11, 12?
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
// You need the spring plugin to bild a fat jar that includes all
// the dependencies. Without this, no dependencies are included in
// the jar and you get NoSuchBeanDefinitionexception
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
您还需要更新您的应用程序属性
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
否则你会在启动服务器时收到警告。
I created both the folder structure and code like yours.
package com.ab;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootTry1Application {
public static void main(String[] args) {
SpringApplication.run(SpringBootTry1Application.class, args);
}
}
Why you change your main class name?Spring boot automatically create main class for you.
package com.ab.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import com.ab.model.WebServiceModel;
import com.ab.service.WebService;
@Controller
public class WebServiceController {
@Autowired
private WebService webSrvService;
@PostMapping(value = "/save")
public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
webSrvService.saveRecord(webServiceModel);
}
}
package com.ab.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;
@Service
public class WebService {
@Autowired
private WebServiceRepository webServiceRepository;
public void saveRecord(WebServiceModel webServiceModel) {
webServiceRepository.save(webServiceModel);
}
}
package com.ab.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import com.ab.model.WebServiceModel;
public interface WebServiceRepository extends JpaRepository<WebServiceModel,Integer>{
}
## LOGS ##
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.7.RELEASE)
2019-09-01 18:26:27.412 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : Starting SpringBootTry1Application on BGINMAC004.local with PID 5522 (/Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1/target/classes started by Dildeep.Singh in /Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1)
2019-09-01 18:26:27.414 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : No active profile set, falling back to default profiles: default
2019-09-01 18:26:27.992 INFO 5522 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-09-01 18:26:28.055 INFO 5522 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 57ms. Found 1 repository interfaces.
2019-09-01 18:26:28.354 INFO 5522 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$d03f4e2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-09-01 18:26:28.583 INFO 5522 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-09-01 18:26:28.602 INFO 5522 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-09-01 18:26:28.603 INFO 5522 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.22]
2019-09-01 18:26:28.692 INFO 5522 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-09-01 18:26:28.692 INFO 5522 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1250 ms
2019-09-01 18:26:28.839 INFO 5522 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2019-09-01 18:26:28.937 INFO 5522 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2019-09-01 18:26:28.981 INFO 5522 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2019-09-01 18:26:29.141 INFO 5522 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.3.10.Final}
2019-09-01 18:26:29.142 INFO 5522 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2019-09-01 18:26:29.228 INFO 5522 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-09-01 18:26:29.316 INFO 5522 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2019-09-01 18:26:29.743 INFO 5522 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@3850e90c'
2019-09-01 18:26:29.746 INFO 5522 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-09-01 18:26:30.149 INFO 5522 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-09-01 18:26:30.210 WARN 5522 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2019-09-01 18:26:30.417 INFO 5522 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-09-01 18:26:30.420 INFO 5522 --- [ main] com.ab.SpringBootTry1Application : Started SpringBootTry1Application in 18.317 seconds (JVM running for 23.971)
2019-09-01 18:41:39.601 INFO 5522 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-09-01 18:41:39.602 INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2019-09-01 18:41:39.615 INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 13 ms
2019-09-01 18:47:48.219 WARN 5522 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=6m18s959ms).
我的代码编译正常。 尝试从 STS 创建新的 spring 启动项目，不要触摸 spring boot main class 并从 here.Your 复制相同的文件夹结构代码肯定会编译。