JSONArray JSONObjec

public class JsonTest {
	private static JSONObject createJSONObject(){
		
		JSONObject jsonObject = new JSONObject();
		jsonObject.put("username","liming");
		jsonObject.put("sex","男");
		jsonObject.put("username","liming");
		jsonObject.put("qq","123456");
		jsonObject.put("scores","100");
		
		return jsonObject;
	}
	
	public static void main(String args[]){
		
	JSONObject jsonObject =  JsonTest.createJSONObject();
	
	Boolean isArray =  jsonObject.isArray();
	Boolean isEmpty =  jsonObject.isEmpty();
	Boolean isNull =  jsonObject.isNullObject();
	
	System.out.println("isArray--"+isArray+"  isEmpty--"+isEmpty+"   isNull--"+isNull);
	System.out.println("jsonObject=="+jsonObject);
	
	jsonObject.element("addr","河北保定");
	jsonObject.put("addr2","hebeibaoding");
	
	
	System.out.println("new jsonObject=="+jsonObject);
	
	
	JSONArray jsonArray = new JSONArray();
	jsonArray.add(0,"the frist jsonarray");
	jsonArray.add(1,"the second jsonarray");
	
	jsonObject.put("jsonArray",jsonArray);
	
	
	System.out.println(" new  jsonObject+jsonarray==="+jsonObject);
	
	 // 根据key返回一个字符串
	String username = (String) jsonObject.getString("username");
	System.out.println("username========"+username);
	
	// 把字符转换为 JSONObject
	String temp =  jsonObject.toString();
	
	System.out.println();
	System.out.println("temp=="+temp);
	
	
	
	
	
	JSONObject object =   JSONObject.fromObject(temp);
	System.out.println();
	System.out.println();
	System.out.println("object=="+object.get("username"));
	
	
	
	String  demo = "{'username':'liming22','sex':'男22'}";
	JSONObject jsonObject2 =   JSONObject.fromObject(demo);
	System.out.println("jsonObject2=="+jsonObject2);
	System.out.println(jsonObject2.get("username"));
	}
	
}

原文地址：https://www.jb51.cc/json/289224.html