JSONArray和JSONObject的使用

 

Json 应用

根据对像生成字符串：
private String getWholesalePriceJson(List<WholesaleProductPriceDTO> priceDtolist) {
        List<WholesalePriceDTO> priceList = new ArrayList<WholesalePriceDTO>();
        if (priceDtolist != null) {
            for (WholesaleProductPriceDTO wholesaleProductPriceDTO : priceDtolist) {
                priceList.add(new WholesalePriceDTO(getWholesaleStandardPriceIdList(wholesaleProductPriceDTO),
                                                 wholesaleProductPriceDTO.getStandard()));
            }
        }
        return JSONArray.fromObject(priceList).toString();
    }

页面显示与操作:

function checkStandard(){
        var YLJ = YAHOO.lang.JSON;
        var priceList = YLJ.parse(document.getElementById("wholesalePrice").value);
        //开始校验重复数据
        var map={};
        for (var i = 0; i < priceList.length; i++) {
         if(priceList[i].value.length > 32) {
          alert("您好，产品介格中产品规则字段长度超过32!");
          return false;
         }
            if(map[priceList[i].value] == null) {
          map[priceList[i].value] = 1;
         } else {
          alert("您好，产品价格中产品规则字段有重复值!");
          return false;
         }
        }
        return true;
       }
       
       

再转换回去成为对象.

JSONArray array = JSONArray.fromObject(json);
return (List<WholesalePriceDTO>) JSONArray.toCollection(array, WholesalePriceDTO.class);

这样简单的应用就完成了

()

//使用JSONObject JSONArray 类
JSONArray array = new JSONArray();
JSONObject jobject = new JSONObject();
String titles = "<a href=/"http://www.163.com/">我是/"title/"</a>";
for (int n = 0; n < 5; n++){
    JSONObject jo = new JSONObject();
    jo.put("id",n);
    jo.put("title",titles + n);
    jo.put("cruser","cruser"+n);
    jo.put("crdate","crdate"+n);
    jo.put("udtuser","udtuser"+n);
    jo.put("udtdate","udtdate"+n);
    jo.put("hits","hits"+n);
    jo.put("hot",true);
    jo.put("ordernum",n);
    jo.put("status","status"+n);
    array.put(jo);
}
jobject.put("totalCount",30);
jobject.put("root",array);
System.out.println(jobject);


记得
import java.util.*;
import org.json.*;

还有try catch

（补充）

package com.longtop.ajax.json;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject ;

public class TestServlet {
   public static void main(String[] args){
    TestServlet ts=new TestServlet();
    System.out.println(ts.dellJson());
   
   // JSONObject jo=JSONObject .fromObject(ts.dellJson());
  
   
    try{
     JSONObject jo=new JSONObject (ts.dellJson());
     JSONArray asonArray = jo.getJSONArray("addressbood");
     Object o = asonArray.get(1);
     JSONObject jo1 = (JSONObject )o;
     System.out.println(jo1.toString());
    
     //JSONArray array=jo1.getJSONArray("address");    
     System.out.println(jo1.get("address"));
     JSONArray asonArray1 = jo1.getJSONArray("address");
     JSONObject jo11 = (JSONObject )asonArray1.get(0);
     System.out.println(jo11.getString("city"));
    }catch(JSONException a){
      a.printStackTrace();
   }
   
   }
   public String dellJson(){
    String str="";
    Map map=new HashMap();
    Address maryLebow = new Address("5 Main Street","San Diego, CA","91912","619-332-3452","664-223-4667");
    map.put("Mary Lebow",maryLebow);

    Address amySmith = new Address("25 H Street","Los Angeles, CA","95212","660-332-3452","541-223-4667");
    map.put("Sally May",amySmith);

    Address johnKim = new Address("2343 Sugarland Drive","Houston, TX","55212","554-332-3412","461-223-4667");
    map.put("John Kim",johnKim);

    Address richardThorn = new Address("14 68th Street","New York, NY","12452","212-132-6182","161-923-4001");
    map.put("Richard Thorn",richardThorn);
      Iterator it=map.entrySet().iterator();   
       
        JSONArray ja=new JSONArray();
        while(it.hasNext()){
        Map.Entry e=(Map.Entry)it.next();
        String name=(String)e.getKey();
        Address add=(Address)e.getValue();
        String city=add.getCity();
        String street=add.getStreet();
        String zip=add.getZip();
        String phone1=add.getPhoneNumber1();
        String phone2=add.getPhoneNumber2();
        try{          
           JSONObject jbAddress=new JSONObject ();
            jbAddress.append("street",street);
            jbAddress.append("city",city);
            jbAddress.append("zip",zip);
            JSONArray jaPhone=new JSONArray();
            jaPhone.put( phone1);
            jaPhone.put( phone2);
            JSONObject jbAddressBook=new JSONObject ();
            jbAddressBook.append("name",name);
            jbAddressBook.append("address",jbAddress);
            jbAddressBook.append("phoneNumbers",jaPhone);         
            ja.put(jbAddressBook);
           
        }catch(JSONException a){
           a.printStackTrace();
        }
       
        }
        try{
        str=new JSONObject ().put("addressbood",ja).toString();
        }catch(JSONException a){
       a.printStackTrace();
    }
       
        return str;
   }

}