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 += "\n";

      }
      tv.settext(s);
    } catch (jsonexception e) {
      e.printstacktrace();
    }
  }

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