json取值方法

最新推荐文章于 2025-09-13 14:00:41 发布

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package com.test.demo.xmljson;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

/**
*
* @author
* json格式取数据
*/
public class JsonFormatCls {

   /**
   * 获取json数据
   * 以“{”开头的是对象格式获取时用 getJSONObject()
   * 以“[”开头的是数组格式获取时用getJSONArray()
   *
   */
   public static void getJsonData(){
       String jsonData="{\"test\":{\"scholl\":{\"schollitem\":{\"name\":\"神州希望小学\",\"phone\":\"68686868\",\"address\":\"XXX省XXX市XXX县\"},\"sclass\":{\"-stype\":\"一级部\",\"classitem\":[{\"teacher\":\"Z老师\",\"classname\":\"一年级\",\"studentnum\":\"30\"},{\"teacher\":\"Y老师\",\"classname\":\"二年级\",\"studentnum\":\"35\"},{\"teacher\":\"J老师\",\"classname\":\"三年级\",\"studentnum\":\"39\"},{\"teacher\":\"H老师\",\"classname\":\"四年级\",\"studentnum\":\"30\"}]}}}}";
       JSONObject obj= JSONObject.fromObject(jsonData);
       System.out.println("obj"+"-----"+obj);
       JSONObject schollObj=obj.getJSONObject("test").getJSONObject("scholl");
       System.out.println("testObj"+"------"+schollObj);
       if(schollObj.toString().length()>0){//判断是否包含该节点
           JSONObject schollitem=schollObj.getJSONObject("schollitem");
           System.out.println("schollitem"+"------"+schollitem);
           String name=schollitem.get("name").toString();
           String phone=schollitem.get("phone").toString();
           String address=schollitem.get("address").toString();
           System.out.println("name"+name+"----phone-----"+phone+"----address----"+address);

           JSONObject jsonClass= schollObj.getJSONObject("sclass");
           System.out.println("scalss-----"+jsonClass);
           String type=jsonClass.get("-stype").toString();
           System.out.println("jsonClass"+jsonClass+"----type-----"+type);

           final char[] strChar = jsonClass.get("classitem").toString().substring(0, 1).toCharArray(); //获取classitem内容首字符
   final char firstChar = strChar[0];
   //此处判断获取的内容的首字符是"["还是"{",如果是"["用getJSONArray()获取节点,如果是“{”用getJSONObject()获取。
   if(firstChar=='['){

       JSONArray classitemArray= jsonClass.getJSONArray("classitem");
       for (int i = 0; i < classitemArray.size(); i++) {
       String teacher=classitemArray.getJSONObject(i).get("teacher").toString();
       String classname=classitemArray.getJSONObject(i).get("classname").toString();
       String studentnum=classitemArray.getJSONObject(i).get("studentnum").toString();
       System.out.println("teacher:"+teacher+"---"+"classname:"+classname+"----studentnum:"+studentnum);
               }
   }else if(firstChar=='{'){

       JSONObject classitemObject= jsonClass.getJSONObject("classitem");
       String teacher=classitemObject.get("teacher").toString();
       String classname=classitemObject.get("classname").toString();
       String studentnum=classitemObject.get("studentnum").toString();
       System.out.println("teacher:"+teacher+"---"+"classname:"+classname+"----studentnum:"+studentnum);
   }
       }

   }

   public static void main(String [] args){
       getJsonData();

   }
}