java工具类集合（一）

所介绍的工具包均可直接新建工具类丢在包下面。

1.在使用Controller向Ajax传参时常常使用JSON来完成传参，所以写了一个工具类，将返回的数据封装成JSON格式。

package com.lgqrlchinese.projectName.utils;

public class ResponseResult<T> {
    
    public ResponseResult() {

    }

    public ResponseResult(T rows) {
        this.data = rows;
    }

    public ResponseResult(String errorMessage) {
        this.success = false;
        this.message = errorMessage;
    }

    public ResponseResult(String errorCode, String errorMessage) {
        this.success = false;
        this.code = errorCode;
        this.message = errorMessage;
    }

    private String code; // 返回的错误状态码

    public void setCode(String code) {
        this.code = code;
    }

    public String getCode() {
        return this.code;
    }

    private Boolean success = true;

    public Boolean setSuccess(Boolean success) {
        return this.success = success;
    }

    public Boolean getSuccess() {
        return this.success;
    }

    private T data;

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    private String message;

    public String getMessage() {
        return this.message;
    }

    public void setMessage(String message) {
        this.success = false;
        this.message = message;
    }

}

使用Demo：

//这里只贴方法内容
 public ResponseResult<List<Bean>> getAllUser(HttpServletResponse response) {
        ResponseResult<List<Bean>> result = new ResponseResult<List<Bean>>();
        List<Bean> list = new ArrayList<Bean>();
        orderInfoManageService.selectAllOrder();
        list = orderInfoManageService.selectAllOrder();
        //        result.setData();
        System.out.println("这是User列表");
        result.setData(list);
        return result;
    }