7、jQuery的Ajax与Java交互带加载图片
1、jQuery的Ajax与Java交互带加载图片
1.1 html代码
<body> <div id="main"> <button id="myBut">Ajax获取数据</button> <div id="container"> <img src="./img/load.jpg" id="myimg"> </div> </div> </body>
1.2 style代码
<style type="text/css">
#main {
margin: 0 auto;
width: 400px;
}
#container {
width: 400px;
height: 300px;
border: 1px dashed #666;
text-align: center;
line-height: 300px;
position: relative;
}
#myimg {
position: absolute;
left: 50%;
top: 50%;
margin-left: -100px;
margin-top: -100px;
display: none;
}
</style>
1.3 Javascript代码
<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(function() {
$('#myBut').click(function() {
$.ajax({
type : "get",
url : "JqueryAjaxServlet",
data : {
age : 18,
name : "zhang"
},
beforeSend : function(XMLHttpRequest) {
//设置图片为可见
$('#myimg').show();
},
success : function(data, textStatus) {
//设置图片隐藏
$('#myimg').hide();
var ajaxResult = jQuery.parseJSON(data);
var age = ajaxResult.age;
var name = ajaxResult.name;
var mydiv = $('#container');
mydiv.html("name:" + name + "," + "age:" + age);
},
complete : function(XMLHttpRequest, textStatus) {
},
error : function() {
}
});
});
});
</script>
1.4 JqueryAjaxServlet.java代码
public class JqueryAjaxServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 模拟网络延迟
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
String age = request.getParameter("age");
String name = request.getParameter("name");
String personJSON = "{\"name" + "\":\"" + name + "\"," + "\"age"
+ "\":" + age + "}";
System.out.println(personJSON);
response.getWriter().write(personJSON);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
1.5 web.xml代码
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