json.java

一个用java写的仓库管理系统

/*
 * json.java
 *
 * Created on 2007骞�6鏈�16鏃�, 涓嬪崍5:05
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.felyxiu.www.common;

import java.util.*;
/**
 *
 * @author root
 */
public class json {
    
    /** Creates a new instance of json */
    public json() {
    }
//  对应JSON的singleInfo成员
    public String singleInfo = "";
    protected String _error = "";
    protected boolean _success = true;
    protected ArrayList arrData = new ArrayList();
    protected ArrayList arrDataItem = new ArrayList();
//  重置，每次新生成一个json对象时必须执行该方法
    public void Reset() {
        _success=true;
        _error="";
        singleInfo="";
        arrData.clear();
        arrDataItem.clear();
    }
    ///添加data数组中一个元素（js对象）的一个名值对，例如
    ///对于一个数组元素：{userName:"supNate",userId:"1"}
    ///需执行两次AddItem：
    ///AddItem("userName","supNate");
    ///AddItem("userId","1");
    ///最后执行
    ///ItemOk();
    ///表示数组元素添加完毕，底下的AddItem表示另一个数组元素的开始
    public void AddItem(String name,String _value) {
        arrDataItem.add(name);
        arrDataItem.add(_value);
    }
    //  一个数组元素添加完毕（data数组）
    public void ItemOk() {
        arrData.add(arrDataItem);
        arrDataItem=new ArrayList();
    }
    //序列化JSON对象，得到返回的JSON代码
    public String toString() {
        StringBuilder sb=new StringBuilder();
        sb.append("{");
        sb.append("success:"+(_success?"true":"false")+",");
        sb.append("error:\""+_error.replace("\"","\\\"")+"\",");
        sb.append("singleInfo:\""+singleInfo.replace("\"","\\\"")+"\",");
        sb.append("data:[");
        
        for(int i=0;i<arrData.size();i++) {
            
            ArrayList arr=(ArrayList)arrData.get(i);
            sb.append("{");
            for(int j=0;j<arr.size();j+=2) {
                if(j==arr.size())break;
                sb.append(arr.get(j));
                sb.append(":");
                sb.append("\"");
                try{
                	sb.append(arr.get(j+1).toString().replace("\"","\\\""));
                }catch(Exception eee){}
                sb.append("\"");
                if(j<arr.size()-2)sb.append(",");
            }
            sb.append("}");
            if(i<arrData.size()-1)sb.append(",");
        }
        sb.append("]");
        sb.append("}");
        return sb.toString();
    }
    public void set_error(String error) {
        
        if(error!="") _success = false;
        this._error = _error;
    }

    public String get_error() {
        return _error;
    }
    
    public void set_success(boolean success) {
        if(success) _error="";
        this._success = success;
    }

    public boolean is_success() {
        return _success;
    }
}