JPA+Enum枚举实现步骤流程

@Data
@Table
@Entity
public class Student {
	@Id
	@GeneratedValue(generator = "uuid")
	@GenericGenerator(name = "uuid",strategy = "org.hibernate.id.UUIDGenerator")
	private String id;
	private String name; // 姓名
	private Sex sex; // 性别
}

public enum Sex { // 性别
    GIRL("FM","女"),BOY("M","男");

    private String code;
    private String sName;
    
    Sex(String code,String sName) {
        this.code = code;
        this.sName = sName;
    }
    
    public String getCode() {
        return code;
    }
   /**
     * 将数据库查询到编码自动转为文字返回给前端
     */
    @JsonValue
    public String getsName() {
        return sName;
    }
}

@Converter(autoApply = true)
public class SexConverter implements AttributeConverter<Sex, String> {
    /**
     * 此方法告诉jpa,数据库里存的值,即插入和更新操作时执行；
     */
    @Override
    public String convertToDatabaseColumn(Sex sex) {
        if(sex == null){
            return null;
        }
        return sex.getCode(); // 此处存储的是编码
    }

    /**
     * 此方法告诉Java从数据库里取出的值对应的是哪个enum值，即查询操作时执行。
     */
    @Override
    public Sex convertToEntityAttribute(String code) {
         if(code == null){
            return null;
        }
        for (Sex sex : Sex.values()) {
            if(sex.getCode().equals(code)){
                return sex; // 获取到当前Sex信息
            }
        }
        throw new IllegalArgumentException(); // 或者给个默认的enum eg: return Category.UNKNOWN
    }
}

@RestController
@RequestMapping("/student")
public class StudentController {
	@Autowired private StudentRepo repo;
	
	@PostMapping(path = "/save")
	public Student save(@RequestBody Student student) {
		repo.save(student);
		return student;
	}
	
	@GetMapping(path = "/list")
	public List<Student> list() {
		return repo.findAll();
	}
}