SpringBoot如何整合SpringDataJPA

时间：2021-02-25 10:27:21|栏目：JAVA代码|点击：次

这篇文章主要介绍了SpringBoot整合SpringDataJPA代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

一、pom.xml添加依赖

<dependencies>
  <!--web-->
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <!--spring data jpa-->
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
  </dependency>
  <!--mysql-->
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
  </dependency>
  <!-- fastjson -->
  <dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.62</version>
  </dependency>
  <!--test-->
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
  </dependency>
</dependencies>

二、配置数据源以及jpa

server:
 port: 8080

#数据源
spring:
 datasource:
  url: jdbc:mysql://192.168.178.5:12345/cloudDB01?useUnicode=true&characterEncoding=UTF-8
  username: root
  password: 123456
  driver-class-name: com.mysql.jdbc.Driver
 jpa:
  database: MySQL
  show-sql: true
  hibernate:
   naming:
    physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

三、创建实体

@Entity
@Table(name = "dept")
public class DeptDTO {

  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "deptno")
  private Integer deptNo;
  @Column(name = "dname")
  private String dName;
  @Column(name = "db_source")
  private String dbSource;

  public Integer getDeptNo() {
    return deptNo;
  }

  public void setDeptNo(Integer deptNo) {
    this.deptNo = deptNo;
  }

  public String getdName() {
    return dName;
  }

  public void setdName(String dName) {
    this.dName = dName;
  }

  public String getDbSource() {
    return dbSource;
  }

  public void setDbSource(String dbSource) {
    this.dbSource = dbSource;
  }
}

四、创建jpa

public interface DeptRepository extends JpaRepository<DeptDTO, Integer>, JpaSpecificationExecutor<DeptDTO>, Serializable {
}

我们DeptRepository 继承了JpaRepository接口（SpringDataJPA提供的简单数据操作接口）、JpaSpecificationExecutor（SpringDataJPA提供的复杂查询接口）、Serializable（序列化接口）。我们并不需要做其他的任何操作了，因为SpringBoot以及SpringDataJPA会为我们全部搞定，SpringDataJPA内部使用了类代理的方式让继承了它接口的子接口都以spring管理的Bean的形式存在，也就是说我们可以直接使用@Autowired注解在spring管理bean使用

五、创建控制器controller

@RestController
@RequestMapping("/dept")
public class DeptController {

  @Autowired
  private DeptRepository deptRepository;
  
  @RequestMapping(value = "/findAll", method = {RequestMethod.POST})
  public List<DeptDTO> findAllDept(){
    return deptRepository.findAll(); //findAll是jpa提供的查询接口
  }

  @RequestMapping(value="/addDept", method={RequestMethod.POST})
  public DeptDTO saveDept(@RequestBody DeptDTO deptDTO){
    deptRepository.save(deptDTO);
    return deptDTO;
  }

}

六、测试controller

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = {JpaApplication.class}) //是该项目的启动类
@WebAppConfiguration
@ContextConfiguration
public class DeptControllerTest {

  @Autowired
  private WebApplicationContext context;

  private MockMvc mvc;

  @Before
  public void setUp() throws Exception {
    mvc = MockMvcBuilders
        .webAppContextSetup(context)
        .build();
  }

  @Test
  public void testQuery() throws Exception {
    MvcResult result=mvc.perform(MockMvcRequestBuilders.post("/dept/findAll")).andReturn();
    MockHttpServletResponse response = result.getResponse();
    String content = response.getContentAsString();
    List<DeptDTO> deptDTOS = JSON.parseArray(content, DeptDTO.class);
    for(DeptDTO deptDTO : deptDTOS){
      System.out.println(deptDTO.getdName());
    }
  }

  @Test
  public void testAdd() throws Exception {
    DeptDTO deptDto = new DeptDTO();
    deptDto.setdName("海盗船");
    deptDto.setDbSource("cloudDB1");
    System.out.println(JSON.toJSONString(deptDto));
    MvcResult result=mvc.perform(MockMvcRequestBuilders.post("/dept/addDept")
        .contentType(MediaType.APPLICATION_JSON).content(JSON.toJSONString(deptDto)))
        .andReturn();
    MockHttpServletResponse response = result.getResponse();
    String content = response.getContentAsString();
    DeptDTO deptDTO = JSON.parseObject(content, DeptDTO.class);
    System.out.println(deptDTO.getDeptNo());
  }
}

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