在spring boot中使用@Autowired注入spring数据jpa存储库失败

问题描述

spring boot 入门类

package com.test;

@SpringBootApplication(exclude={
DataSourceAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class})
public class AssetManagementDigital2Application {

    public static void main(String[] args) {
        SpringApplication.run(AssetManagementDigital2Application.class, args);
    }
}

控制器类

package com.test.assetmanagementdigital.controller;

 @RestController

public class ShopController {

    @Autowired
    private ShopServiceImpl shopServiceImpl;

    @RequestMapping(value="/shops",method=RequestMethod.POST)
    public void shopDetails(Shop shop){
        shopServiceImpl.addShopDetails(shop);

    }

}

实体

package com.test.assetmanagementdigital.model;

import javax.persistence.Entity;
import javax.persistence.Table;

@Entity
@Table(name="ShopDetails")
public class Shop {

    private String shopName;
    private Address address;

    public String getShopName() {
        return shopName;
    }

    public void setShopName(String shopName) {
        this.shopName = shopName;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }


}

数据 jpa 存储库接口

package com.test.assetmanagementdigital.repository;
    @Repository
    public interface ShopRepository extends CrudRepository<Shop,Long>{

    }

服务类

package com.test.assetmanagementdigital.service;
@Service
public class ShopServiceImpl {

    @Autowired
    private ShopRepository shopRepository;

    public void addShopDetails(Shop shop) {
        shopRepository.save(shop);
    }

}

gradle 文件

 buildscript {
        ext {
            springBootVersion = '2.0.0.BUILD-SNAPSHOT'
        }
        repositories {
            mavenCentral()
            maven { url "https://repo.spring.io/snapshot" }
            maven { url "https://repo.spring.io/milestone" }
        }
        dependencies {
            classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
        }
    }

    apply plugin: 'java'
    apply plugin: 'eclipse-wtp'
    apply plugin: 'org.springframework.boot'
    apply plugin: 'io.spring.dependency-management'
    apply plugin: 'war'

    version = '0.0.1-SNAPSHOT'
    sourceCompatibility = 1.8

    repositories {
        mavenCentral()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }

    configurations {
        providedRuntime
    }

    dependencies {
        compile('org.springframework.boot:spring-boot-starter-data-jpa')
        compile('org.springframework.boot:spring-boot-starter-web')
        compile("com.h2database:h2")
        compile group: 'org.hibernate', name: 'hibernate-core', version: '4.2.2.Final'
        providedRuntime('org.springframework.boot:spring-boot-starter-tomcat')
        testCompile('org.springframework.boot:spring-boot-starter-test')
    }

我收到以下错误

Description:

Field shopRepository in com.test.assetmanagementdigital.service.ShopServiceImpl required a bean of type 'com.test.assetmanagementdigital.repository.ShopRepository' that could not be found.

Action:

Consider defining a bean of type 'com.test.assetmanagementdigital.repository.ShopRepository' in your configuration.

如果我从 ShopRepository 中删除了 @Autowired 注释，那么它会抛出 `NullPointerException

if i remove the @Autowired annotation from ShopRepository then it will throw `NullPointerException

我已经尝试过 @EnableJpaRepositories("com.test.assetmanagementdigital.repository") 在这里我得到

I have tried @EnableJpaRepositories("com.test.assetmanagementdigital.repository") here I get

org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'shopController': Unsatisfied dependency expressed through field 'shopServiceImpl'; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'shopServiceImpl': Unsatisfied dependency expressed through field 'shopRepository'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': Post-processing of merged bean definition failed; nested exception is
java.lang.NoSuchMethodError: javax.persistence.PersistenceContext.synchronization()Ljavax/persistence/SynchronizationType;

推荐答案

您的 Spring 配置不正确.

Your Spring configuration is not correct.

spring-boot-starter-data-jpa 已经提供了 hibernate-core 依赖.当您使用特定版本声明它时:

The spring-boot-starter-data-jpa already provides the hibernate-core dependency. While you declare it with a specific version :

compile group: 'org.hibernate', name: 'hibernate-core', version: '4.2.2.Final'

您不必再次声明它，因为您指定的版本可能与启动器提供的版本不同且不兼容.
根据您的错误，情况似乎是这样，因为在运行时找不到 javax.persistence.PersistenceContext.synchronization() 方法.

You have not to declare it a second time as your specified version may be different and not compatible with the version provided by the starter.
And according to your error, it seems be the case as the javax.persistence.PersistenceContext.synchronization() method is not found at runtime.

合并bean定义后处理失败；嵌套异常是java.lang.NoSuchMethodError:javax.persistence.PersistenceContext.synchronization()Ljavax/persistence/SynchronizationType;

只需删除 hibernate-core 依赖项，它应该可以工作.

Just remove the hibernate-core dependency and it should work.

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