請求頁面request.jsp
復(fù)制代碼 代碼如下:
%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
!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>
script language="javascript">!--
function GetXmlHttpObject(){
var xmlHttp = null;
try{
xmlHttp = new XMLHttpRequest();
}catch(e){
try{
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
function showMsg(str){
xmlHttp = GetXmlHttpObject();
if(xmlHttp == null){
alert ("you browser don't support the ajax");
return;
}
var url = "response.jsp";
url = url + "?q="+ str;
url = url + "sid ="+ Math.random();
xmlHttp.onreadystatechange = stateChanged;
xmlHttp.open("GET", url, true);
xmlHttp.send(null);
}
function stateChanged()
{
if(xmlHttp.readyState==4)
{
document.getElementById("showHint").innerHTML = xmlHttp.responseText;
}
}
// -->/script>
/head>
body>
form name="form1" action="" method="post">
p>RocarsId:/p>
select name="select1" onchange="showMsg(document.form1.select1.options[document.form1.select1.selectedIndex].value)" >
option value="140">140/option>
option value="150">150/option>
/select>
div id="showHint">Show rocars ccrn messages./div>
/form>
/body>
/html>
response.jsp
復(fù)制代碼 代碼如下:
%@ page language="java" contentType="text/plain; charset=UTF-8"
pageEncoding="UTF-8"%>
%@ page import="com.lwf.eus.util.*,java.util.*,com.lwf.eus.entity.*,com.lwf.eus.bean.*" %>
html>
head>
title>response the ccrn/title>
/head>
body>
%
String q = request.getParameter("q");
System.out.println("message:" + q);
RocarsBean rocars = RocarsEntity.getRocarsListById(q);
%>
table>
tr>
td>RocarsId/td>
td>RocarsCcrn/td>/tr>
tr>
td>%=rocars.getRocarsId() %>/td>
td>%=rocars.getCcrn() %>/td>
/tr>
/table>
/body>
/html>
注意這里與自學(xué)練習(xí)一不同的是，request.jsp頁面用一個div來顯示信息，response.jsp從數(shù)據(jù)庫里面查詢出來的內(nèi)容放在table標簽里，其它的html標簽不會在div里面顯示。
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