JSONObject与JSONArray的区别简述: 区别在于JSONObject是一个{}包裹起来的一个对象(Object), 而JSONArray则是[]包裹起来的一个数组(Array), 说白点就是一个是数组一个是对象或字符串。 例1:
package com.rtt.lltest;
import java.util.HashMap;
import java.util.Map;import org.json.JSONArray;
import com.rtt.platform.system.util.JSONUtil;
import net.sf.json.JSONObject;
public class Test { public static void main(String[] args) { // Object 类型字符串 String json = "{\"name\":\"reiz\",\"age\":\"32\"}"; JSONObject jsonObj = JSONObject.fromObject(json); String name = jsonObj.getString("name"); System.out.println(name+"||||||||||||||"); // 结果:reiz jsonObj.put("initial", name.substring(0, 1).toUpperCase()); // jsonObject 添加数组 String[] likes = new String[] { "JavaScript", "Skiing", "Apple Pie" }; jsonObj.put("likes", likes); // jsonObject 添加Map Map<String, String> ingredients = new HashMap<String, String>(); ingredients.put("apples", "3kg"); ingredients.put("sugar", "1kg"); ingredients.put("pastry", "2.4kg"); ingredients.put("bestEaten", "outdoors"); jsonObj.put("ingredients",ingredients); System.out.println(jsonObj); System.out.println(jsonObj.getString("likes")); System.out.println(jsonObj.getString("ingredients")); org.json.JSONObject jsonObje = new org.json.JSONObject(); JSONUtil.put(jsonObje, "perNum", "lisi"); JSONUtil.put(jsonObje, "cardNum", "12345600"); org.json.JSONObject jsonObjee = new org.json.JSONObject(); JSONUtil.put(jsonObjee, "perNum", "lilei"); JSONUtil.put(jsonObjee, "cardNum", "123456"); JSONArray jsonArray = new JSONArray(); jsonArray.put(jsonObje); jsonArray.put(jsonObjee); System.out.println("---------------------------------"); System.out.println(jsonArray.toString()); } }=========================================================
JSONUtil.java
public static void put(JSONObject jsonObj, String key, Object value) {
if (value == null) {
jsonObj.put(key, StringPool.BLANK);
}
else {
jsonObj.put(key, value.toString());
}
}
例2:JSONArray和JSONObject互相添加
package com.rtt.lltest;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class ObjTest {
public static void main(String[] args) { // TODO Auto-generated method stub JSONObject jo = new JSONObject(); jo.put("isleaf", true); jo.put("name", "zhangsan"); jo.put("age", "25"); JSONObject jo2 = new JSONObject(); jo2.put("isleaf", false); jo2.put("name", "lisi"); jo2.put("age", "25"); JSONObject jo3 = new JSONObject(); jo3.put("isleaf", true); jo3.put("name", "lisi"); jo3.put("age", "25"); JSONArray ja0 = new JSONArray(); //把JSONObject添加到中JSONArray ja0.add(jo3); //把JSONArray添加到JSONObject中 jo2.element("children", ja0); System.out.println(jo2.toString()); JSONArray ja1 = new JSONArray(); ja1.add(jo); ja1.add(jo2); ja1.add(jo3); System.out.println("===================================+++++++++++++++++++++"); System.out.println(ja1.toString()); System.out.println("===================================+++++++++++++++++++++"); }
}