创建名称为 'activityController' 的 bean 时出错
Error creating bean with name 'activityController'
我在服务器 (Tomcat) 上 运行 我的项目时遇到了这个问题。我使用 Spring 创建了一个 Maven 项目。 Java 版本是 Java 1.8。
否 SPRING-开机！
Error creating bean with name 'activityController': Unsatisfied dependency expressed through field 'activityService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'activityService': Unsatisfied dependency expressed through field 'dao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.calendar.repository.ActivityDAO' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
你能帮帮我吗？谢谢！
这是代码。
谢谢！！！
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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.calendar</groupId>
<artifactId>calendar</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Calendar</name>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<springframework.version>5.1.4.RELEASE</springframework.version>
<jackson.version>2.11.2</jackson.version>
<email.version>1.6.2</email.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.4.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.1.Final</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.0</version>
</dependency>
</dependencies>
<repositories>
</repositories>
<build>
<finalName>company-calendar</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
Activity.java
package com.calendar.entity;
import java.io.Serializable;
import javax.persistence.*;
import java.sql.Timestamp;
import java.util.List;
/**
* The persistent class for the activity database table.
*
*/
@Entity
@NamedQuery(name = "Activity.findAll", query = "SELECT a FROM Activity a")
public class Activity implements Serializable {
private static final long serialVersionUID = 1L;
@Id
private Integer id;
@Column(name = "create_time")
private Timestamp createTime;
@Column(name = "created_by")
private String createdBy;
private String description;
@Column(name = "update_time")
private Timestamp updateTime;
@Column(name = "updated_by")
private String updatedBy;
//bi-directional many-to-one association to CalendarHeader
@OneToMany(mappedBy = "activity")
private List<CalendarHeader> calendarHeaders;
public Activity() {
}
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public Timestamp getCreateTime() {
return this.createTime;
}
public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}
public String getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public Timestamp getUpdateTime() {
return this.updateTime;
}
public void setUpdateTime(Timestamp updateTime) {
this.updateTime = updateTime;
}
public String getUpdatedBy() {
return this.updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
public List<CalendarHeader> getCalendarHeaders() {
return this.calendarHeaders;
}
public void setCalendarHeaders(List<CalendarHeader> calendarHeaders) {
this.calendarHeaders = calendarHeaders;
}
public CalendarHeader addCalendarHeader(CalendarHeader calendarHeader) {
getCalendarHeaders().add(calendarHeader);
calendarHeader.setActivity(this);
return calendarHeader;
}
public CalendarHeader removeCalendarHeader(CalendarHeader calendarHeader) {
getCalendarHeaders().remove(calendarHeader);
calendarHeader.setActivity(null);
return calendarHeader;
}
}
ActivityDAO.java
package com.calendar.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.calendar.entity.Activity;
@Repository
public interface ActivityDAO extends JpaRepository<Activity, Integer> {}
**ActivityDTO.java**
package com.calendar.dto;
import java.sql.Timestamp;
public class ActivityDTO {
private Integer id;
private String description;
private Timestamp createTime;
private String createdBy;
private Timestamp updateTime;
private String updatedBy;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Timestamp getCreateTime() {
return createTime;
}
public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
public Timestamp getUpdateTime() {
return updateTime;
}
public void setUpdateTime(Timestamp updateTime) {
this.updateTime = updateTime;
}
public String getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
}
ActivityService.java
package com.calendar.service;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.calendar.dto.ActivityDTO;
import com.calendar.repository.ActivityDAO;
import com.calendar.entity.Activity;
@Service
public class ActivityService {
@Autowired
ActivityDAO dao;
public List<ActivityDTO> findAll() {
List<ActivityDTO> DTOList = new ArrayList<ActivityDTO>();
List<Activity> entity = dao.findAll();
if (entity != null) {
for (Activity e : entity) {
DTOList.add(getDTOFromEntity(e));
}
}
return DTOList;
};
protected ActivityDTO getDTOFromEntity(Activity entity) {
ActivityDTO activityDTO = new ActivityDTO();
activityDTO.setId(entity.getId());
activityDTO.setDescription(entity.getDescription());
activityDTO.setCreatedBy(entity.getCreatedBy());
activityDTO.setCreateTime(entity.getCreateTime());
activityDTO.setUpdatedBy(entity.getUpdatedBy());
activityDTO.setUpdateTime(entity.getUpdateTime());
return activityDTO;
}
}
ActivityController.java
package com.calendar.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.calendar.dto.ActivityDTO;
import com.calendar.service.ActivityService;
@RestController
@RequestMapping("activity")
public class ActivityController {
@Autowired
private ActivityService activityService;
private ActivityService getService() {
System.out.println("service= " + activityService);
return activityService;
}
@Transactional(readOnly = true)
@GetMapping("")
@ResponseBody
public List<ActivityDTO> findAll() {
System.out.println("SIL findAll");
return getService().findAll();
}
}
AppConfig.java
package com.calendar.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.jpa.LocalEntityManagerFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages = "com.calendar")
public class AppConfig implements WebMvcConfigurer {
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
//to see html files
configurer.enable();
}
//Entity manager
@Bean(name = "Calendar_PU")
public LocalEntityManagerFactoryBean getEntityManagerFactoryBean() {
LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
factoryBean.setPersistenceUnitName("Calendar_PU");
return factoryBean;
}
}
此致，
弗朗切斯科
尝试将 @EnableJpaRepositories 添加到您的 AppConfig:
@Configuration
@EnableWebMvc
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "com.calendar.repository")
@ComponentScan(basePackages = "com.calendar")
public class AppConfig implements WebMvcConfigurer {
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
//to see html files
configurer.enable();
}
//Entity manager
@Bean(name = "Calendar_PU")
public LocalEntityManagerFactoryBean getEntityManagerFactoryBean() {
LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
factoryBean.setPersistenceUnitName("Calendar_PU");
return factoryBean;
}
}
您还需要更改您的 pom.xml。依赖项太多（其中大部分已经是 spring-data-jpa 的一部分）并且 spring-data-jpa 需要 Spring 5.3.5.
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.calendar</groupId>
<artifactId>calendar</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Calendar</name>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<springframework.version>5.3.5</springframework.version>
<jackson.version>2.11.2</jackson.version>
<email.version>1.6.2</email.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.4.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.0</version>
</dependency>
</dependencies>
<repositories>
</repositories>
<build>
<finalName>company-calendar</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
这就是为什么您应该考虑使用 Spring Boot.您将避免无法协同工作的依赖项问题。
我在服务器 (Tomcat) 上 运行 我的项目时遇到了这个问题。我使用 Spring 创建了一个 Maven 项目。 Java 版本是 Java 1.8。 否 SPRING-开机！
Error creating bean with name 'activityController': Unsatisfied dependency expressed through field 'activityService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'activityService': Unsatisfied dependency expressed through field 'dao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.calendar.repository.ActivityDAO' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
你能帮帮我吗？谢谢！
这是代码。 谢谢！！！
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.calendar</groupId>
<artifactId>calendar</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Calendar</name>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<springframework.version>5.1.4.RELEASE</springframework.version>
<jackson.version>2.11.2</jackson.version>
<email.version>1.6.2</email.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.4.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.1.Final</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.0</version>
</dependency>
</dependencies>
<repositories>
</repositories>
<build>
<finalName>company-calendar</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
Activity.java
package com.calendar.entity;
import java.io.Serializable;
import javax.persistence.*;
import java.sql.Timestamp;
import java.util.List;
/**
* The persistent class for the activity database table.
*
*/
@Entity
@NamedQuery(name = "Activity.findAll", query = "SELECT a FROM Activity a")
public class Activity implements Serializable {
private static final long serialVersionUID = 1L;
@Id
private Integer id;
@Column(name = "create_time")
private Timestamp createTime;
@Column(name = "created_by")
private String createdBy;
private String description;
@Column(name = "update_time")
private Timestamp updateTime;
@Column(name = "updated_by")
private String updatedBy;
//bi-directional many-to-one association to CalendarHeader
@OneToMany(mappedBy = "activity")
private List<CalendarHeader> calendarHeaders;
public Activity() {
}
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public Timestamp getCreateTime() {
return this.createTime;
}
public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}
public String getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public Timestamp getUpdateTime() {
return this.updateTime;
}
public void setUpdateTime(Timestamp updateTime) {
this.updateTime = updateTime;
}
public String getUpdatedBy() {
return this.updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
public List<CalendarHeader> getCalendarHeaders() {
return this.calendarHeaders;
}
public void setCalendarHeaders(List<CalendarHeader> calendarHeaders) {
this.calendarHeaders = calendarHeaders;
}
public CalendarHeader addCalendarHeader(CalendarHeader calendarHeader) {
getCalendarHeaders().add(calendarHeader);
calendarHeader.setActivity(this);
return calendarHeader;
}
public CalendarHeader removeCalendarHeader(CalendarHeader calendarHeader) {
getCalendarHeaders().remove(calendarHeader);
calendarHeader.setActivity(null);
return calendarHeader;
}
}
ActivityDAO.java
package com.calendar.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.calendar.entity.Activity;
@Repository
public interface ActivityDAO extends JpaRepository<Activity, Integer> {}
**ActivityDTO.java**
package com.calendar.dto;
import java.sql.Timestamp;
public class ActivityDTO {
private Integer id;
private String description;
private Timestamp createTime;
private String createdBy;
private Timestamp updateTime;
private String updatedBy;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Timestamp getCreateTime() {
return createTime;
}
public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
public Timestamp getUpdateTime() {
return updateTime;
}
public void setUpdateTime(Timestamp updateTime) {
this.updateTime = updateTime;
}
public String getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
}
ActivityService.java
package com.calendar.service;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.calendar.dto.ActivityDTO;
import com.calendar.repository.ActivityDAO;
import com.calendar.entity.Activity;
@Service
public class ActivityService {
@Autowired
ActivityDAO dao;
public List<ActivityDTO> findAll() {
List<ActivityDTO> DTOList = new ArrayList<ActivityDTO>();
List<Activity> entity = dao.findAll();
if (entity != null) {
for (Activity e : entity) {
DTOList.add(getDTOFromEntity(e));
}
}
return DTOList;
};
protected ActivityDTO getDTOFromEntity(Activity entity) {
ActivityDTO activityDTO = new ActivityDTO();
activityDTO.setId(entity.getId());
activityDTO.setDescription(entity.getDescription());
activityDTO.setCreatedBy(entity.getCreatedBy());
activityDTO.setCreateTime(entity.getCreateTime());
activityDTO.setUpdatedBy(entity.getUpdatedBy());
activityDTO.setUpdateTime(entity.getUpdateTime());
return activityDTO;
}
}
ActivityController.java
package com.calendar.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.calendar.dto.ActivityDTO;
import com.calendar.service.ActivityService;
@RestController
@RequestMapping("activity")
public class ActivityController {
@Autowired
private ActivityService activityService;
private ActivityService getService() {
System.out.println("service= " + activityService);
return activityService;
}
@Transactional(readOnly = true)
@GetMapping("")
@ResponseBody
public List<ActivityDTO> findAll() {
System.out.println("SIL findAll");
return getService().findAll();
}
}
AppConfig.java
package com.calendar.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.jpa.LocalEntityManagerFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages = "com.calendar")
public class AppConfig implements WebMvcConfigurer {
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
//to see html files
configurer.enable();
}
//Entity manager
@Bean(name = "Calendar_PU")
public LocalEntityManagerFactoryBean getEntityManagerFactoryBean() {
LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
factoryBean.setPersistenceUnitName("Calendar_PU");
return factoryBean;
}
}
此致， 弗朗切斯科
尝试将 @EnableJpaRepositories 添加到您的 AppConfig:
@Configuration
@EnableWebMvc
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "com.calendar.repository")
@ComponentScan(basePackages = "com.calendar")
public class AppConfig implements WebMvcConfigurer {
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
//to see html files
configurer.enable();
}
//Entity manager
@Bean(name = "Calendar_PU")
public LocalEntityManagerFactoryBean getEntityManagerFactoryBean() {
LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
factoryBean.setPersistenceUnitName("Calendar_PU");
return factoryBean;
}
}
您还需要更改您的 pom.xml。依赖项太多（其中大部分已经是 spring-data-jpa 的一部分）并且 spring-data-jpa 需要 Spring 5.3.5.
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.calendar</groupId>
<artifactId>calendar</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Calendar</name>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<springframework.version>5.3.5</springframework.version>
<jackson.version>2.11.2</jackson.version>
<email.version>1.6.2</email.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.4.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.0</version>
</dependency>
</dependencies>
<repositories>
</repositories>
<build>
<finalName>company-calendar</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
这就是为什么您应该考虑使用 Spring Boot.您将避免无法协同工作的依赖项问题。