{
  "code": 0,
  "data": {},
  "msg": "",
  "error": ""
}

/**
 * Created by wolf on 2017/9/16.
 */
public class  Res<T> {

    private int code = 0;
    private T data;
    private String msg = "";
    private String error = "";

    public static Res ok = new Res();
    public static Res fail = new Res().code(-1);

    public static Res build() {
        return new Res();
    }

    public static <T> Res build(T data){
        return new Res().data(data);
    }

    public Res code(int code) {
        this.code = code;
        return this;
    }

    public Res data(T data) {
        this.data = data;
        return this;
    }

    public Res msg(String msg) {
        this.msg = msg;
        return this;
    }

    public Res error(String error) {
        this.error = error;
        return this;
    }
	//省略getter
}

@RestController
@RequestMapping("/xxx")
public class XxxController{
    
  	@GetMapping
  	public Res<Xxx> getXxx(){
        Xxx xxx = new Xxx();
      	return Res.build(xxx);
      	// return Res.ok.data(xxx).msg("获取成功");
      	// return Res.fail.error("获取失败！");
      	// return Res.fail.code(401).error("登录过期！");
    }
}