Page: postingxml.html
<%@ page contenttype= "text/html; CHARSET=GBK "%>
<title>
Send an XML request
</title>
<script type= "Text/javascript" >
XMLHttpRequest objects
var xmlHttp;
Creating XMLHttpRequest Objects
function Createxmlhttprequest () {
if (window. ActiveXObject) {
XmlHttp = new ActiveXObject ("Microsoft.XMLHTTP");
}
else if (window. XMLHttpRequest) {
XmlHttp = new XMLHttpRequest ();
}
}
Create an XML string
function Createxml () {
var xml = "<pets>"
var options = document.getElementById ("Pettypes"). ChildNodes;
var option = null;
for (var i = 0; i < options.length; i++) {
option = Options[i];
if (option.selected) {
XML = XML + "<type>" + option.value + "<\/type>";
}
}
XML = XML + "<\/pets>";
return XML;
}
Send Pet Type request
function Sendpettypes () {
Createxmlhttprequest ();
var xml = Createxml ();
Processing methods
var url = "postingxmlexample?timestamp=" + New Date (). GetTime ();
Xmlhttp.open ("POST", url,true);
Xmlhttp.onreadystatechange = Handlestatechange;
Set Request Header Format
Xmlhttp.setrequestheader ("Conteyt-type", "application/x-www-form-urlencoded;");
Xmlhttp.send (XML);
}
callback method
function Handlestatechange () {
if (xmlhttp.readystate = = 4) {
if (Xmlhttp.status = = 200) {
Parse return result
Parseresults ();
}
}
}
Parse return result
function Parseresults () {
var responsediv = document.getElementById ("Serverresponse");
if (Responsediv.haschildnodes ()) {
Responsediv.removechild (Responsediv.childnodes[0]);
}
Returns text constructs a text node
var responsetext = document.createTextNode (Xmlhttp.responsetext);
Responsediv.appendchild (ResponseText);
}
</script>
<body bgcolor= "#ffffff" >
Please select the type of pet in your home:
<form action= "#" >
<select id= "Pettypes" size= "6" multiple= "multiple" >
<option value= "Cats" > Cat </option>
<option value= "Dogs" > Dog </option>
<option value= "Fish" > Fishes </option>
<option value= "birds" > Bird </option>
<option value= "Hamsters" > Mouse </option>
<option value= "Rabbits" > Rabbit </option>
</select>
<br/><br/>
<input type= "button" value= "Submit"/>
</form>
<div id= "Serverresponse" >
</div>
</body>
Server-side
Postingxmlexample.java
Import java.io.*;
Import javax.servlet.*;
Import javax.servlet.http.*;
Import javax.xml.parsers.*;
Import org.w3c.dom.*;
public class Postingxmlexample
Extends HttpServlet {
private static final String Content_Type = "text/html;" CHARSET=GBK ";
Initialize Global Variables
public void Init () throws Servletexception {
}
Process POST Requests
public void DoPost (HttpServletRequest request, httpservletresponse response) throws
Servletexception, IOException {
Get the requested XML string
String XML = readxmlfromrequestbody (request);
Document xmldoc = null;
try {
xmldoc = Documentbuilderfactory.newinstance (). Newdocumentbuilder (). Parse (New Bytearrayinputstream (Xml.getBytes ()) );
}
catch (Exception ex) {
System.out.println ("Parse XML exception ...");
}
Get Type node List
NodeList selectedpettypes = Xmldoc.getelementsbytagname ("type");
String type = null;
String responsetext = "Selected pet is:";
for (int i = 0; i < selectedpettypes.getlength (); i++) {
Type = Selectedpettypes.item (i). Getfirstchild (). Getnodevalue ();
ResponseText = ResponseText + "" + type;
}
Response.setcontenttype (Content_Type);
Response.getwriter (). print (responsetext);
}
/**
* Readxmlfromrequestbody
*
* @param request HttpServletRequest
* @return String
*/
Private String Readxmlfromrequestbody (HttpServletRequest request) {
StringBuffer XML = new StringBuffer ();
String line = null;
try {
BufferedReader reader = Request.getreader ();
while (line = Reader.readline ())!= null) {
Xml.append (line);
}
}
catch (Exception ex) {
SYSTEM.OUT.PRINTLN ("Read XML error:" + ex.getmessage ());
}
return xml.tostring ();
}
Clean up resources
public void Destroy () {
}
}
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
