Json 生成与解析详解及实例代码

Json 生成与解析
JSON常用与服务器进行数据交互，JSON中“{}”表示JSONObject，“[]”表示JSONArray
如下json数据：

1 {"singers":[2 {"id":"02","name":"tom","gender":"男","tel":["123456","789012"]},3 {"id":"03","name":"jerry","gender":"男","tel":["899999","666666"]},4 {"id":"04","name":"jim","gender":"男","tel":["7777","5555"]},{"id":"05","name":"lily","gender":"女","tel":["222222","111111"]}5 ]}

生成json数据代码：

public String buildJson（） throws JSONException {JSONObject persons = new JSONObject（）;JSONArray personArr = new JSONArray（）;JSONObject person = new JSONObject（）;person.put（"id", "02"）;person.put（"name", "tom"）;person.put（"gender", "男"）;JSONArray tel = new JSONArray（）;tel.put（"123456"）;tel.put（"789012"）;person.put（"tel", tel）;personArr.put（person）;JSONObject person2 = new JSONObject（）;person2.put（"id", "03"）;person2.put（"name", "jerry"）;person2.put（"gender", "男"）;JSONArray tel2 = new JSONArray（）;tel2.put（"899999"）;tel2.put（"666666"）;person2.put（"tel", tel2）;personArr.put（person2）;JSONObject person3 = new JSONObject（）;person3.put（"id", "04"）;person3.put（"name", "jim"）;person3.put（"gender", "男"）;JSONArray tel3 = new JSONArray（）;tel3.put（"7777"）;tel3.put（"5555"）;person3.put（"tel", tel3）;personArr.put（person3）;JSONObject person4 = new JSONObject（）;person4.put（"id", "05"）;person4.put（"name", "lily"）;person4.put（"gender", "女"）;JSONArray tel4 = new JSONArray（）;tel4.put（"222222"）;tel4.put（"111111"）;person4.put（"tel", tel4）;personArr.put（person4）;persons.put（"singers", personArr）;return persons.toString（）;}

解析json数据代码：

private void parseJsonMulti（String strResult） {try {JSONArray jsonObjs = new JSONObject（strResult）.getJSONArray（"singers"）;String s = "";for （int i = 0; i < jsonObjs.length（）; i++） {JSONObject jsonObj = （（JSONObject） jsonObjs.opt（i））;int id = jsonObj.getInt（"id"）;String name = jsonObj.getString（"name"）;String gender = jsonObj.getString（"gender"）;s += "ID号" + id + ", 姓名：" + name + ",性别：" + gender + "，电话：";JSONArray tel = jsonObj.getJSONArray（"tel"）;for （int j = 0; j < tel.length（）; j++） {s += tel.getString（j）+"/";}s += "
";}tv.setText（s）;} catch （JSONException e） {e.printStackTrace（）;}}

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