Java中的Json

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Java中Json的构建
- JSONObject构建json数据
- 使用Map构建json
- 使用JavaBean构建对象

Java中Json的构建

本笔记跟随慕课网的Java中的Json课程学习并笔记之。如有需要，请参阅http://www.imooc.com/learn/523

1. JSONObject构建json数据

JSONObject wangxiaoer = new JSONObject();Object nullObject = null;try {    wangxiaoer.put("name", "王小二");    wangxiaoer.put("age", 25.2);    wangxiaoer.put("birthday", "1990-01-02");    wangxiaoer.put("school", "蓝翔");    wangxiaoer.put("major", new String[]{"理发","挖掘机"});    wangxiaoer.put("has_girlfriend",false );    wangxiaoer.put("car",nullObject);    wangxiaoer.put("house",nullObject);    wangxiaoer.put("comment","这是一个注释");    System.out.println(wangxiaoer.toString());} catch (JSONException e) {    // TODO Auto-generated catch block    e.printStackTrace();}

2. 使用Map构建json

Map<String, Object> wangxiaoer = new HashMap<String, Object>();Object nullObject = null;wangxiaoer.put("name", "王小二");wangxiaoer.put("age", 25.2);wangxiaoer.put("birthday", "1990-01-02");wangxiaoer.put("school", "蓝翔");wangxiaoer.put("major", new String[] { "理发", "挖掘机" });wangxiaoer.put("has_girlfriend", false);wangxiaoer.put("car", nullObject);wangxiaoer.put("house", nullObject);wangxiaoer.put("comment", "这是一个注释");System.out.println(new JSONObject(wangxiaoer).toString());

3. 使用JavaBean构建对象

 private static void createJsonByBean() {   // TODO Auto-generated method stub   Wangxiaoer wangxiaoer = new Wangxiaoer();    //Wangxiaoer是一个JavaBean   wangxiaoer.setName("王小二");   wangxiaoer.setAge(25.2);   wangxiaoer.setBirthday("1990-02-03");   wangxiaoer.setSchool("蓝翔");   wangxiaoer.setMajor(new String[] { "理发", "挖掘机" });   wangxiaoer.setHas_girlfriend(false);   wangxiaoer.setCar(null);   wangxiaoer.setHouse(null);   wangxiaoer.setComment("这是一个注释");   System.out.println(new JSONObject(wangxiaoer)); }

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