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();
	}
}