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Spring Boot Sample 018之spring-boot-data-jparepository

一、环境

Idea 2020.1
JDK 1.8
maven

二、目的

spring boot整合jparepository。

gitHub地址：https://github.com/ouyushan/ouyushan-spring-boot-samples

三、步骤

3.1、点击File -> New Project -> Spring Initializer，点击next

3.2、在对应地方修改自己的项目信息

3.3、选择Web依赖，选中Spring Web、Spring Data JPA、MySQL Driver。可以选择Spring Boot版本，本次默认为2.2.6，点击Next

3.4、项目结构

四、添加文件

pom.xml文件

<?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>2.2.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.ouyushan</groupId>
    <artifactId>spring-boot-data-jparepository</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-data-jparepository</name>
    <description>JPA project for Spring Boot</description>

    <properties>
        <java.version>1.8</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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- 解决json与hibernate懒加载引起的问题 -->
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-hibernate5</artifactId>
            <version>2.11.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.properties文件

######   mysql     #######
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root

######   JPA     #######
spring.jpa.database=MYSQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.properties.hibernate.format-sql=true
spring.jpa.hibernate.ddl-auto=update

#spring.jpa.database-platform=org.hibernate.dialect.MySQL8Dialect
spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

######   log     #######
logging.level.org.ouyushan.springboot.data.jparepository=debug

JpaConfig.java

package org.ouyushan.springboot.data.jparepository.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.hibernate5.Hibernate5Module;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;

/**
 * @Description: 需指定扫描japRepositories路径和entiry路径
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/5/8 10:00
 */

@Configuration
@EnableJpaRepositories("org.ouyushan.springboot.data.jparepository")
@EntityScan("org.ouyushan.springboot.data.jparepository.entity")
public class JPAConfig {

    /* <!-- 解决json与hibernate懒加载引起的问题 --> */
    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {

        Hibernate5Module hibernate5Module = new Hibernate5Module();
        hibernate5Module.configure(Hibernate5Module.Feature.USE_TRANSIENT_ANNOTATION, false);

        MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = jsonConverter.getObjectMapper();
        objectMapper.registerModule(new Hibernate5Module());

        return jsonConverter;
    }
}

UserInfoRepository.java

package org.ouyushan.springboot.data.jparepository.repository;

import org.ouyushan.springboot.data.jparepository.entity.UserInfo;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/5/8 10:56
 */
public interface UserInfoRepository extends JpaRepository<UserInfo, Long> {

    /* 更新 */
    @Modifying
    @Query("update UserInfo u set  u.userName = ?1, u.password = ?2, u.age = ?3  where u.id = ?4")
    int update(String userName, String password,int age,Long id);
}

UserInfoService.java

package org.ouyushan.springboot.data.jparepository.service;

import org.ouyushan.springboot.data.jparepository.entity.UserInfo;

import java.util.List;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/5/8 10:58
 */
public interface UserInfoService {

    UserInfo add(UserInfo userInfo);

    int update(UserInfo userInfo);

    void delete(Long id);

    UserInfo findUserInfo(Long id);

    List<UserInfo> findUserInfoList();
}

UserInfoServiceImpl.java

package org.ouyushan.springboot.data.jparepository.service;

import org.ouyushan.springboot.data.jparepository.entity.UserInfo;
import org.ouyushan.springboot.data.jparepository.repository.UserInfoRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Optional;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/5/8 10:58
 */
@Service("userInfoService")
@Transactional
public class UserInfoServiceImpl implements UserInfoService {


    @Autowired
    private UserInfoRepository userInfoRepository;

    /* 增加 */
    @Override
    public UserInfo add(UserInfo userInfo) {
        return this.userInfoRepository.save(userInfo);
    }

    /* 更新 */
    @Override
    public int update(UserInfo userInfo) {
        return this.userInfoRepository.update(userInfo.getUserName(), userInfo.getPassword(), userInfo.getAge(), userInfo.getId());
    }

    /* 删除 */
    @Override
    public void delete(Long id) {
        this.userInfoRepository.deleteById(id);
    }

    /* 根据id查找 */
    @Override
    public UserInfo findUserInfo(Long id) {
        Optional<UserInfo> optional = this.userInfoRepository.findById(id);
        return optional.orElse(new UserInfo());
    }

    /* 获取列表 */
    @Override
    public List<UserInfo> findUserInfoList() {
        return this.userInfoRepository.findAll();
    }
}

UserInfoController.java

package org.ouyushan.springboot.data.jparepository.controller;

import org.ouyushan.springboot.data.jparepository.entity.UserInfo;
import org.ouyushan.springboot.data.jparepository.service.UserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/5/8 11:03
 */
@RestController
@RequestMapping("/api/user")
public class UserInfoController {

    @Autowired
    private UserInfoService userInfoService;

    /**
     * 查询个人信息
     *
     * @param id
     * @return
     */
    @GetMapping(value = "/getUser/{id}")
    public UserInfo getUserInfo(@PathVariable("id") Long id) {
        UserInfo userInfo = userInfoService.findUserInfo(id);
        if (userInfo == null) {
            throw new RuntimeException("查询为空");
        }
        return userInfo;
    }

    /**
     * 查询用户列表
     *
     * @return
     */
    @GetMapping(value = "/getUsers")
    public List<UserInfo> getUserInfoList() {
        List<UserInfo> userInfoList = this.userInfoService.findUserInfoList();
        if (userInfoList == null || userInfoList.size() == 0) {
            throw new RuntimeException("用户列表为空");
        }
        return userInfoList;
    }

    /**
     * 新增用户
     */
    @PostMapping(value = "/addUser")
    public void addUser(@RequestBody UserInfo userInfo) {
        try {
            this.userInfoService.add(userInfo);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("新增用户失败");
        }
    }

    /**
     * 更新用户
     *
     * @param
     */
    @PutMapping(value = "/updateUser")
    public void update(@RequestBody UserInfo userInfo) {
        try {
            this.userInfoService.update(userInfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @DeleteMapping(value = "/delete/{id}")
    public void delete(@PathVariable("id") Long id) {
        try {
            this.userInfoService.delete(id);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("删除用户：" + id + " 失败");
        }
    }

}

五、测试

SpringBootDataJparepositoryApplicationTests.java

package org.ouyushan.springboot.data.jparepository;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.jupiter.api.Test;
import org.ouyushan.springboot.data.jparepository.entity.UserInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultHandlers;

import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@SpringBootTest
@AutoConfigureMockMvc
class SpringBootDataJparepositoryApplicationTests {

    private static Logger logger = LoggerFactory.getLogger(SpringBootDataJparepositoryApplicationTests.class);


    /**
     * 根据ID查询
     */
    @Test
    public void testSelectById(@Autowired MockMvc mockMvc) throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/api/user/getUser/{1}", 1))
                .andDo(MockMvcResultHandlers.print()) //方法用于 打印请求、响应及其他相关信息
                .andExpect(status().isOk())
                .andExpect(content().json(("{"id":1,"userName":"admin","password":"123","age":28}")));
    }

    /**
     * 查询用户列表
     */
    @Test
    public void testSelectAll(@Autowired MockMvc mockMvc) throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/api/user/getUsers"))
                .andDo(MockMvcResultHandlers.print())
                //.andDo(print())
                .andExpect(status().isOk());
    }


    /**
     * 添加用户
     *
     * @throws Exception
     */
    @Test
    public void testAddUser(@Autowired MockMvc mockMvc) throws Exception {

        UserInfo userInfo = new UserInfo();
        userInfo.setUserName("mockMvc");
        userInfo.setPassword("mockmvc");
        userInfo.setAge(24);

        ObjectMapper mapper = new ObjectMapper();
        String userJson = mapper.writeValueAsString(userInfo);

        mockMvc.perform(MockMvcRequestBuilders.post("/api/user/addUser")
                .contentType(MediaType.APPLICATION_JSON)
                .accept(MediaType.APPLICATION_JSON)
                .content(userJson))

                .andDo(MockMvcResultHandlers.print())
                // .andDo(print())
                .andExpect(status().isOk());
    }


    /**
     * 更新用户
     *
     * @throws Exception
     */
    @Test
    public void testUpdateUser(@Autowired MockMvc mockMvc) throws Exception {

        UserInfo userInfo = new UserInfo();
        userInfo.setId(9L);
        userInfo.setUserName("mockMvc1");
        userInfo.setPassword("mockmvc1");
        userInfo.setAge(28);

        ObjectMapper mapper = new ObjectMapper();
        String userJson = mapper.writeValueAsString(userInfo);

        mockMvc.perform(MockMvcRequestBuilders.put("/api/user/updateUser")
                .contentType(MediaType.APPLICATION_JSON)
                .accept(MediaType.APPLICATION_JSON)
                .content(userJson))

                .andDo(MockMvcResultHandlers.print())
                // .andDo(print())
                .andExpect(status().isOk());
    }

    /**
     * 删除
     *
     * @throws Exception
     */
    @Test
    public void testDeleteUser(@Autowired MockMvc mockMvc) throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.delete("/api/user/delete/{id}", 9))
                .andDo(MockMvcResultHandlers.print())
                .andExpect(status().isOk());
    }
}

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原文地址：https://www.cnblogs.com/ouyushan/p/13031155.html