Spring Boot 数据库操作

Spring Boot 数据库操作

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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();
    	}
    }