ajax学习

发布时间：2020-12-15 21:44:22 所属栏目：百科来源：网络整理

导读：1.ajaxIndex.jsp %@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"htmlheadmeta http-equiv="Content-Type"

1.ajaxIndex.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<span style="color:#FF0000;"><script src="../js/jquery.min.js"></script>
<script src="./ajaxDeal.js"></script></span>
</head>
<body>
<span style="color:#FF0000;"><span id="pos_placeholder" style="width: 0px; height: 0px; visibility: hidden; margin: 0px; padding: 0px;"></span><input type="text" id="namevalue">
<br />
<button id="btn">Send</button>
结果：<span id="result"></span></span>
</body>
</html>

ajaxDeal.js

$(document).ready(function(){
	$("#btn").on("click",function(){
		$.post("ajaxServer.jsp",{name:$("#namevalue").val()},function(data){
			$("#result").text(data);
		});
	});
});

也可以这样写：

var name="name="+$("#namevalue").val();
		$.post("ajaxServer.jsp",name,function(data){
			$("#result").text(data);
                      //$("#result").html(data);
});

ajaxServer.jsp

<%
String str=request.getParameter("name")+"";
if("null".equals(str)){
	out.print("Args Error");
}else{	
	out.print("Hello "+str);
}
%>

result：ajax异步请求访问，页面不刷新

（编辑：李大同）

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