Spring Boot 数据库操作

# Spring Boot 数据库操作

数据源配置

• Oracle 数据源配置

  参考《搭建Spring Boot项目-六》

• MySQL 数据源配置
  • 在pom中添加依赖

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

  • 在配置文件中添加如下配置

    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://127.0.0.1:3306/mysql
    spring.datasource.username=用户名
    spring.datasource.password=密码
    # [create|create-drop|update|validate]
    spring.jpa.hibernate.ddl-auto=update

数据库操作

• 添加实体类

  @Entity
  @Table(name = "OMS_USER")
  public class OmsUser implements Serializable {
  
      private static final long serialVersionUID = 1L;
  
      @Id
      private String id;
  
      @Column(name = "DISPLAY_ID")
      private String displayId;
  
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public String getDisplayId() {
          return displayId;
      }
  
      public void setDisplayId(String displayId) {
          this.displayId = displayId;
      }
  }

  PS:Entity中不映射成列的字段,使用@Transient注解。

• 添加DAO

  继承JpaRepository类即可(已封装简单的CRUD操作)。

  public interface OmsUserRepository extends JpaRepository<OmsUser, String> {
  
  }

• 测试

  @RestController
  @RequestMapping(value = "/api")
  public class StudentController {
  
      @Autowired
      OmsUserRepository omsUserRepository;
  
      @GetMapping(value = "/user")
      public List<OmsUser> getAllUser() {
          return this.omsUserRepository.findAll();
      }
  
      @GetMapping(value = "/user/{id}")
      public OmsUser getUserById(@PathVariable("id") String id) {
          return omsUserRepository.findById(id).get();
      }
  }

原文地址：https://www.cnblogs.com/wscy/p/9228246.html