JSONArray JSONObjec

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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 JSONObjectString 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"));}}
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