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I was just learning struts, so take struts for example
1. First import the following files into your Web project
Commons-beanutils-1.7.0.jar
Commons-collections-3.1.jar
Commons-lang-2.5.jar
Commons-logging-1.1.1.jar
Ezmorph-1.0.3.jar
Json-lib-2.1-jdk15.jar
2. Write a login.jsp example, here I only write body contents
<body>
<script type= "Text/javascript" >
$ (function () {
$ ("#s1"). Click (function () {
/*getjson The following three parameters are the Url,{key:value,key1:value1},callback callback function, JSON is the background through the response obtained by the PrintWriter written over the * *
$.getjson ("<%=basepath%>/authority/test", {name:1}, function (JSON) {
$ ("#s1"). empty ();
For (var. v in JSON) {
$ ("#s1"). Append ("<option>" +json[v]+ "<option>");
}
});
});
<!--Click End-
})
</script>
<!--
this gives a variety of JSON data processing can be used for reference;
$ (function () {
var json = {"name": "Jack", "gender": "Male", "height": 174.00, "Birthday": New Date ()};//define a JSON object
$ ("#b100"). Click (function () {
alert (json.birthday);
});
$ ("#b101"). Click (function () {
for (Var key in JSON) {
Alert (Json[key]);
}
});
var Jsonarray = [{"Program name": "Non-sincerity Not Disturb", "host": "Mengfei", "ratings": 0.2},
{"Program name": "Limit Challenge", "anchor": "Willow", "ratings": 0.1},
{"Program name": "NBA", "host": "Zhou Jianrong", "ratings": 0.3},
{"Program name": "Mother Mia", "host": "Mom", "ratings": 0.9},
{"Program name": "Fancy Sister", "anchor": "Linzhiling", "ratings": 0.1},
{"Program name": "Day Up", "host": "Wang Han", "ratings": 0.15}
];
$ ("#b102"). Click (function () {
/*
for (Var index=0;index<jsonarray.length;index++)
Alert (jsonarray[index]["program name"]);
*/
For (var index in Jsonarray) {
var v= "";
for (var key in Jsonarray[index]) {
v=key+ "=" +jsonarray[index][key]+ "\ T" +V;
}
Alert (v);
}
});
$ ("#b103"). Click (function () {
var jsonstr = ' ({"name": "Rose", "Address": "Jiangsu Wuxi"}) ';
var jsons = eval (jsonstr);
Alert (jsons["name"]);
});
})
-
<select id= "S1" >
</select>
</body>
3.struts Configure yourself (if you are a servlet.) Web. XML also configures itself), the connection of an action, the code is as follows:
public class Testjson extends Actionsupport {
/* (Non-javadoc)
* @see Com.opensymphony.xwork2.actionsupport#execute ()
*/
@Override
Public String Execute () throws Exception {
//If your class is servlet,response can be used directly
HttpServletResponse Response=servletactioncontext.getresponse ();
Response.setcontenttype ("Text/html;charset=utf-8");
//2. Data take map as an example
map<string,string> map = new hashmap<string, string> ();
Map.put ("100", "Washing machine");
Map.put ("101", "washing powder");
Map.put ("102", "refrigerator");
Map.put ("103", "air conditioner");
Map.put ("104", "color TV");
Map.put ("105", "oven");
//3. Converting data to bit JSON, converting to string jsonstr;
String jsonstr = jsonobject.fromobject (map). ToString ();
//4. Data write out
PrintWriter out = Response.getwriter ();
Out.write (JSONSTR);
Out.flush ();
Out.close ();
return Super.execute ();
}
}
Ajax App ———— local refresh after click
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