java read json

{
   "pageInfo": {
         "pageName": "abc",
         "pagePic": "http://example.com/content.jpg"
    },
    "posts": [
         {
              "post_id": "123456789012_123456789012",
              "actor_id": "1234567890",
              "picOfPersonWhoPosted": "http://example.com/photo.jpg",
              "nameOfPersonWhoPosted": "Jane Doe",
              "message": "Sounds cool. Can't wait to see it!",
              "likesCount": "2",
              "comments": [],
              "timeOfPost": "1234567890"
         }
    ]
}

Java code :

JSONObject obj = new JSONObject(responsejsonobj);
String pageName = obj.getJSONObject("pageInfo").getString("pageName");

JSONArray arr = obj.getJSONArray("posts");
for (int i = 0; i < arr.length(); i++)
{
    String post_id = arr.getJSONObject(i).getString("post_id");
    ......etc
}

ajax 读取json数据

click to gain json data




 

 [
{"optionKey":"1", "optionValue":"Canon in D"},
{"optionKey":"2", "optionValue":"Wind Song"},
{"optionKey":"3", "optionValue":"Wings"}
]

jquery 解析 json数据

<script type="text/javascript">
$(document).ready(function(){
$("#button").click(function(){
alert ("good");

$.getJSON("http://localhost/index.php/users", function(json){
         
$.each(json, function(idx, obj) {
             
                 
                    alert(obj.name);
           
             });


       });
});
});
</script>
json格式：
[{"user_id":"2","username":"guest2","name":"John","profile_pic":""},{"user_id":"1","username":"guest","name":"tom","profile_pic":""}]
json的格式对于解析非常重要，一定要规范化