java返回实体类

package com.demo.common.beans;
import lombok.Data;
import java.io.Serializable;
/**
 * @author zys
 */
@Data
public class ResultJson implements Serializable {
   private static final long serialVersionUID = 1L;
   public static final int SUCCESS = 0;
   public static final int FAIL = 1;

   private String msg = "success";
   private int code = SUCCESS;
   private long timestamp;
   private T data;
   public ResultJson() {
      super();
   }
   public ResultJson(T data) {
      super();
      this.data = data;
      this.timestamp = System.currentTimeMillis();
   }
   public ResultJson(Throwable e) {
      super();
      this.msg = e.toString();
      this.code = FAIL;
   }
   public static  ResultJson ok(T data){
      ResultBean rj = new ResultBean();
      rj.code = SUCCESS;
      rj.msg = "success";
      rj.timestamp = System.currentTimeMillis();
      rj.data = data;
      return rj;
   }
   public static  ResultJson ok(){
      ResultBean rj = new ResultBean();
      rj.code = SUCCESS;
      rj.msg = "success";
      rj.timestamp = System.currentTimeMillis();
      return rj;
   }
   public static  ResultJson error(String msg){
      ResultBean rj = new ResultBean();
      rj.code = FAIL;
      rj.msg = msg;
      rj.timestamp = System.currentTimeMillis();
      return rj;
   }
   public static  ResultJson error(int code,String msg){
      ResultBean rj = new ResultBean();
      rj.code = code;
      rj.msg = msg;
      rj.timestamp = System.currentTimeMillis();
      return rj;
   }
}