JSONObject与JSONArray的使用

发布时间：2020-12-16 19:42:31 所属栏目：百科来源：网络整理

导读：出处:http://www.jb51.cc/article/p-dzdxytlc-g.html Java不像PHP解析和生产JSON总是一个比较痛苦的过程。但是使用JSONObject和JSONArray会让整个过程相对舒服一些。需要依赖的包：commons-lang.jar commons-beanutils.jar commons-collections.jar commons

出处:http://www.52php.cn/article/p-dzdxytlc-g.html

Java不像PHP解析和生产JSON总是一个比较痛苦的过程。但是使用JSONObject和JSONArray会让整个过程相对舒服一些。

需要依赖的包：commons-lang.jar commons-beanutils.jar commons-collections.jar commons-logging.jar ezmorph.jar json-lib-2.2.2-jdk15.jar

1. 创建一个JSONObject对象：

[java] 
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   print 
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 packagecom.xxx.video.resource.controller.web;
 
importjava.util.ArrayList;
 importjava.util.HashMap;
 
importnet.sf.json.JSONArray;
importnet.sf.json.JSONObject;
publicclassTest{
staticvoidmain(String[]args){
 //JsonObject和JsonArray区别就是JsonObject是对象形式，JsonArray是数组形式
 //创建JsonObject第一种方法
 JSONObjectjsonObject=newJSONObject();
 jsonObject.put("UserName","ZHULI");
 jsonObject.put("age","30");
 jsonObject.put("workIn","ALI");
 System.out.println("jsonObject1："+jsonObject);
//创建JsonObject第二种方法
 HashMap<String,String>hashMap=newHashMap<String,String>();
 hashMap.put("UserName","ZHULI");
 hashMap.put("age","30");
 hashMap.put("workIn","ALI");
 System.out.println("jsonObject2："+JSONObject.fromObject(hashMap));
//创建一个JsonArray方法1
 JSONArrayjsonArray=newJSONArray();
 jsonArray.add(0,108); list-style:decimal-leading-zero outside; color:inherit; line-height:17.27272605895996px; margin:0px!important; padding:0px 3px 0px 10px!important"> jsonArray.add(1,0); background-color:inherit">2,108); list-style:decimal-leading-zero outside; color:inherit; line-height:17.27272605895996px; margin:0px!important; padding:0px 3px 0px 10px!important"> System.out.println("jsonArray1："+jsonArray);
//创建JsonArray方法2
 ArrayList<String>arrayList=newArrayList<String>();
 arrayList.add("ZHULI");
 arrayList.add("30");
 arrayList.add("ALI");
 System.out.println("jsonArray2："+JSONArray.fromObject(arrayList));
//如果JSONArray解析一个HashMap，则会将整个对象的放进一个数组的值中
 System.out.println("jsonArrayFROMHASHMAP："+JSONArray.fromObject(hashMap));
//组装一个复杂的JSONArray
 JSONObjectjsonObject2=newJSONObject();
 jsonObject2.put("UserName",108); list-style:decimal-leading-zero outside; line-height:17.27272605895996px; margin:0px!important; padding:0px 3px 0px 10px!important"> jsonObject2.put("age",108); list-style:decimal-leading-zero outside; color:inherit; line-height:17.27272605895996px; margin:0px!important; padding:0px 3px 0px 10px!important"> jsonObject2.put("workIn",108); list-style:decimal-leading-zero outside; line-height:17.27272605895996px; margin:0px!important; padding:0px 3px 0px 10px!important"> jsonObject2.element("Array",arrayList);
 System.out.println("jsonObject2："+jsonObject2);
 }
 }

结果：

[html] 
   

jsonObject1：{"UserName":"ZHULI","age":"30","workIn":"ALI"}

jsonObject2：{"workIn":"ALI","UserName":"ZHULI"}
jsonArray1：["ZHULI","30","ALI"]
jsonArray2：["ZHULI","ALI"]
jsonArrayFROMHASHMAP：[{"workIn":"ALI","UserName":"ZHULI"}]
jsonObject2：{"UserName":"ZHULI","workIn":"ALI","Array":["ZHULI","ALI"]}

解析JSON字符串：

packagecom.xxx.video.resource.controller.web;

importnet.sf.json.JSONArray;
importnet.sf.json.JSONObject;
publicclassTest{
publicstaticvoidmain(String[]args){
StringjsonString="{"UserName":"ZHULI","age":"30","workIn":"ALI","Array":["ZHULI","30","ALI"]}";
//将Json字符串转为java对象
JSONObjectobj=JSONObject.fromObject(jsonString);
//获取Object中的UserName
if(obj.has("UserName")){
System.out.println("UserName:"+obj.getString("UserName"));
}
//获取ArrayObject
if(obj.has("Array")){
JSONArraytransitListArray=obj.getJSONArray("Array");
for(inti=0;i<transitListArray.size();i++){
System.out.print("Array:"+transitListArray.getString(i)+"");
}

UserName:ZHULI

Array:ZHULIArray:30Array:ALI

对象遍历

(!obj.isNull(

"sku"

)){

JSONObjectskuObject=obj.getJSONObject("sku");
Iterator<String>keys=skuObject.keys();
Stringkey;
Objecto;
while(keys.hasNext()){
key=keys.next();
o=skuObject.get(key);
skuMap.put(key,String.valueOf(o));
}

（编辑：李大同）

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