Json 生成与解析详解及实例代码

来源：互联网发布：c语言编程用什么软件编辑：程序博客网时间：2024/05/20 09:10

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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：

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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]}<br>

生成json数据代码：

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

解析json数据代码：

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privatevoid parseJsonMulti(String strResult) {
    try{
      JSONArray jsonObjs = newJSONObject(strResult).getJSONArray("singers");
      String s = "";
 
      for(inti = 0; i < jsonObjs.length(); i++) {
        JSONObject jsonObj = ((JSONObject) jsonObjs.opt(i));
        intid = 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(intj = 0; j < tel.length(); j++) {
 
          s += tel.getString(j)+"/";
        }
 
        s += "\n";
 
      }
      tv.setText(s);
    }catch(JSONException e) {
      e.printStackTrace();
    }
  }

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