java解析json

1、引入json-org.jar包

2、

1）json解析

String jsonString="{\"users\":[{\"loginname\":\"张三\",\"password\":\"123\",\"email\":\"16666666@qq.com\"},{\"loginname\":\"李四\",\"password\":\"333\",\"email\":\"777887@qq.com\"}]}";
JSONObject json= new JSONObject(jsonString);
JSONArray jsonArray=json.getJSONArray("users");
for(int i=0;i<jsonArray.length();i++){
JSONObject user=(JSONObject) jsonArray.get(i);
String userName=(String) user.get("loginname");
String password=(String) user.get("password");
System.out.println("userName:"+userName+"------------password:"+password);
}

2）//json解析

String str = "{\"response\":{\"data\":[{\"address\":\"郑州动物园\",\"province\":\"河南省\",\"district\":\"金水区\",\"city\":\"郑州\"}]},\"status\":\"ok\"}";
JSONObject dataJson=new JSONObject(str);
JSONObject response=dataJson.getJSONObject("response");
JSONArray data=response.getJSONArray("data");
JSONObject info=data.getJSONObject(0);
String province=info.getString("province");
String city=info.getString("city");
String district=info.getString("district");
String address=info.getString("address");
System.out.println("province:"+province+"--------city:"+city+"------------district:"+district+"--------------address:"+address);

 

3）//json解析数组转换成对象

String str = "[{\"name\":\"array\",\"id\":123456,\"date\":\"2013-4-13 12:36:54\"},{\"name\":\"tom\",\"id\":123,\"date\":\"2013-4-13 12:36:54\"}]";
JSONArray jsonArray = new JSONArray(str);
int iSize = jsonArray.length();
System.out.println("Size:" + iSize);
for (int i = 0; i < iSize; i++) {
JSONObject jsonObj = jsonArray.getJSONObject(i);
System.out.println("name=" + jsonObj.get("name"));
System.out.println("id=" + jsonObj.get("id"));
System.out.println("date=" + jsonObj.get("date"));
System.out.println();
}