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

spring data jpa repository inject fails using @Autowired in spring boot

提问by kiran rathod

spring boot entry class

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);
    }
}

Controller class

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);

    }

}

Entity

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;
    }


}

data jpa repository interface

数据 jpa 存储库接口

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

    }

Service class

服务等级

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

    @Autowired
    private ShopRepository shopRepository;

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

}

gradle file

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')
    }

I am getting following error

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.

if i remove the @Autowiredannotation from ShopRepositorythen it will throw `NullPointerException

如果我@Autowired从中删除注释，ShopRepository它将抛出 `NullPointerException

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

我在@EnableJpaRepositories("com.test.assetmanagementdigital.repository")这里尝试过

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;

回答by davidxxx

Your Spring configuration is not correct.

您的 Spring 配置不正确。

The spring-boot-starter-data-jpaalready provides the hibernate-coredependency. While you declare it with a specific version :

在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：

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

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.

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，似乎是这种情况，因为javax.persistence.PersistenceContext.synchronization()在运行时找不到该方法。

Post-processing of merged bean definition failed; nested exception is java.lang.NoSuchMethodError: javax.persistence.PersistenceContext.synchronization()Ljavax/persistence/SynchronizationType;

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

Just remove the hibernate-coredependency and it should work.

只需删除hibernate-core依赖项，它应该可以工作。

回答by Darshan Mehta

You need to provide the package name to Spring to scan the repositories from, using @EnableJpaRepositoriesannnotation, e.g.:

您需要使用@EnableJpaRepositories注释向 Spring 提供包名称以从中扫描存储库，例如：

@SpringBootApplication
@EnableJpaRepositories("com.test.assetmanagementdigital.repository")
public class AssetManagementDigital2Application

Here'sthe documentation.

这是文档。