JSP implementation of user login and registration based on XML example analysis (source code)

JSP implementation of user login and registration based on XML example analysis (source code) _jsp programming

Last Update:2017-01-18 Source: Internet

Author: User

Tags flush getmessage xml example

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Simple XML Database login and Registration
Topic Description:
1.xml Read and save, mainly to dom4j technology , (the file storage path in the network using ClassLoader)
Read and store files, write a factory class

public class Documentfactory {private static Document dom=null;//needs to share a DOM, so it needs to be set to static private static String Name= 
 "User.xml"; 


private static String filename; 
  Write a static block to implement the reading of the DOM tree static{//dom4j technology Saxreader read=new Saxreader (); Filename=documentfactory.class.getclassloader (). GetResource (name). GetPath ();//using the class loader to read the file try {dom=read.read (f 
   Ilename); catch (Documentexception e) {<span style= "font-family:arial, Helvetica, Sans-serif;" > E.printstacktrace ();} 
</span>//main acquired and stored two functions (in single case mode) (must share a DOM number) public static Document GetDocument () {//Get the DOM tree return DOM in XML; 
  You need to save the public static void Save () {XMLWriter WR after registering; 
  try {wr = new XMLWriter (new FileOutputStream (filename)); 
  }catch (Exception E1) {throw new RuntimeException ("failed to read files while storing files"); 
  try {wr.write (DOM); 
  catch (IOException e) {throw new RuntimeException ("Write file Failed" +e.getmessage ()); 
  }finally{try {if (wr!=null) {wr.close ();  } catch (IOException e) {throw new RuntimeException ("Off stream failed" +e.getmessage ());}} 
 }

2. Foreground technology: Basically is the construction of the interface and the data to the background for processing. And part of the required option requirements.
Two-page code:
//Login

<body> 
   <form action= ' login ' method= ' post ' > 
   username: <input type= "text" name= "name"/><br/ > 
   Password: <input type= "text" name= "pwd"/><br/> 
   Authentication code: <input type= "text" name= "Checkcode" > <a href= "Javascript:flush ()" > can't see the </a>//need to rewrite a JS to refresh 
   <br /> 
   <input type= "Submit" value= "Login"/> <input type= 
   "reset" value= "reset"/> <a 
   ' href= ' JSPs /reg.jsp ' > Registration </a>

Log in background processing

public class Login extends HttpServlet {public void doget (HttpServletRequest request, httpservletresponse response) 
 Throws Servletexception, IOException {doPost (request, response); public void DoPost (HttpServletRequest request, httpservletresponse response) throws Servletexception, Ioexcep tion {request.setcharacterencoding ("utf-8");//Set UTF-8 encoding format to receive Response.setcontenttype ("Text/html;charset=utf-8" );//<span style= "color: #ff0000;" 
   
  > Set the page display mode, this setting must be set before getting output stream, otherwise the settings are not used, so will appear garbled </span> printwriter out = Response.getwriter (); Out.println ("<! 
  DOCTYPE HTML public \-//w3c//dtd HTML 4.01 transitional//en\ ">"); 
  Out.println ("<HTML>"); 
  Out.println ("

Registered

<body> 
  <form action= ' reg ' method= "POST" > 
   username: <input type= "text" name= "name" onblur= "Check ()" Id= "name"/><span id= "Spanid" ></span><br/> 
   Password: <input type= "text" name= "pwd" id= "pwd" Onblur= "Check1 ()"/><span id= "Spanid1" ></span><br/> 
   Confirm Password: <input type= "text" Name= "PWD2" "Id=" Pwd2 "onblur=" Check2 () "/><span id=" Spanid2 "></span><br/> 
   <input type=" Submit " value= "register"/> 
   <input type= "reset" value= "reset"/> 
    
  </form> 
 </body>

Background processing for registration

public void DoPost (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException { Response.setcontenttype ("Text/html;charset=utf-8");//<span style= "color: #ff0000;" 
  > must be set to set invalid </span> printwriter out = Response.getwriter () before obtaining printwrite; Out.println ("<! 
  DOCTYPE HTML public \-//w3c//dtd HTML 4.01 transitional//en\ ">"); 
  Out.println ("<HTML>"); 
  Out.println ("

3. Verification code technology: the same from the background to get pictures, and login time to match
Effect Chart:

1, the first is to verify the authentication code

2. Password Matching

3, User Registration

4. Correct password

5, view User.xml file

Entire login and registered source code download address: JSP implementation of user login and registration based on XML example analysis

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