<pre class=javascript name= "code" ></pre><pre class=javascript name= "code" > ————————————————————— This is Ajax (JavaScript) code ——————————————————————————— </pre><pre class=javascript name= "code" ></PRE> <pre class=javascript name= "code" >function Send_request (Callback, urladdress, Isreturndata) {
var xmlhttp = getxmlhttprequest ();
Xmlhttp.onreadystatechange = function () {
if (xmlhttp.readystate = = 4) {//readystate is 4-data transfer end
try{
if (Xmlhttp.status = = 200) {
if (Isreturndata && isreturndata==true) {
Callback (Xmlhttp.responsetext);
}
}else{
Callback ("Sorry, did not find this page:" + urladdress + "");
}
catch (e) {
Callback ("Sorry, send request failed, please try again" + e);
}
}
}
Xmlhttp.open ("POST", urladdress, True);
Xmlhttp.send (NULL);
}
function Getxmlhttprequest () {
var xmlhttp;
if (window. XMLHttpRequest) {
try {
XMLHTTP = new XMLHttpRequest ();
Xmlhttp.overridemimetype ("Text/html;charset=utf-8");/set to identify data by UTF-8 encoding
catch (e) {}
else if (window. ActiveXObject) {
try {
XMLHTTP = new ActiveXObject ("Microsoft.XMLHTTP");
catch (e) {
try {
XMLHTTP = new ActiveXObject ("Msxml2.xmlhttp");
catch (e) {
try {
XMLHTTP = new ActiveXObject ("Msxml3.xmlhttp");
catch (e) {}
}
}
}
return XMLHTTP;
}
</PRE> ———————————————————————— This is the client form JSP code —————————————————————————————— <BR>
<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "%><%@ taglib uri="/struts-tags "prefix=" s "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >Content= "text/html; Charset=utf-8 "><title>insert title Here</title><script type=" Text/javascript "src=" <%= Request.getcontextpath ()%>/js/xmlhttp.js "></script><script type=" Text/javascript ">function" GetProcess (value) {var process = document.getElementById (' process '); Send_request (function (value2)
{process.innerhtml = value2;}, "Getprocesstype.action?value=" +value, True);} </script>Value= "G" > Management process </option><option value= "Z" > Support process </option></select><div id= "process" ><select name= "Smallclass" ><option value= "first-level process name" Selected> Please select a first-level process name </OPTION></select> </div><input type= "Submit" value= "submitted" ></form></div></body><PRE></PRE>
<BR>
<p><pre class=html name= "code" ><pre class=html name= "code" > ———————————————————————— This is the service-side action code —————————————————————————————— </PRE><BR>
<P></P>
<PRE></PRE>
Here's my business logic, and each logic is different, so this code is just to put what you want to display in the request range, and then return to the next page. JavaBean has my myprocess class and its properties
<P></P>
<p><pre Class=java name= "code" >public String Getprocesstype () {
HttpServletRequest request=servletactioncontext.getrequest ();
String value=request.getparameter ("value");
List<myprocess> myprocesses= Processservice.getprocessbytype (value);
for (myprocess p:myprocesses) {
System.out.println (P.getname ());
}
Request.setattribute ("list", myprocesses);
return SUCCESS;
}</pre><pre class=html name= "code" ></pre><pre class=html name= "code" ></pre><pre class=html name= "Code" > ———————————————————————— This is the service-side JSP code —————————————————————————————— </pre><pre class=html name= "code" ><%@ page language= "java" contenttype= "text/html"; Charset=utf-8 "
pageencoding= "UTF-8"%>
<%@ include file= "/page/share/taglib.jsp"%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">
<title>insert title here</title>
<body>
<select name= "Smallclass" >
<option value= "First-level process name" Selected> Please select the first process name </OPTION>
<c:foreach items= "${list}" var= "Myprocess" >
<option value= "${myprocess.processid}" >
${myprocess.name}
</option>
</c:forEach>
</select>
</body>
<BR>
<P></P>
<P> the process is pretty much the same! </P>
<P><BR>
</P>
</PRE>
