统一结果处理类模板

@Data
public class RetSet {
    private Boolean flag;
    private String message;
    private Map<String,Object> data=new HashMap<>();
    private Integer code;

    // 构造器私有化
    private RetSet(){}

    // 成功的静态方法
    public static RetSet success(){
        RetSet retSet=new RetSet();
        retSet.setCode(Status.SUCCESS);
        retSet.setFlag(true);
        retSet.setMessage("成功");
        return retSet;
    }
    // 失败的静态方法
    public static RetSet error(){
        RetSet retSet=new RetSet();
        retSet.setCode(Status.ERROR);
        retSet.setFlag(false);
        retSet.setMessage("失败");
        return retSet;
    }

    public RetSet addMessage(String message){
        this.setMessage(message);
        return this;
    }

    public RetSet addCode(Integer code){
        this.setCode(code);
        return this;
    }

    public RetSet addData(String key,Object value){
        this.data.put(key,value);
        return this;
    }

    public RetSet addData(Map map){
        this.setData(map);
        return this;
    }

    public RetSet addFlag(boolean flag){
        this.setFlag(flag);
        return this;
    }
}