Development Environment: myeclipse + atat6
1. Create a web project named registersystem,
2. Create the login. jsp file in the webroot directory and modify the content in the body as follows:
<Body>
<Form action = "login">
Username: <input type = "text" name = "username"> <br>
Password: <input type = "password" name = "PWD"> <br>
<Input type = "Submit">
</Form>
</Body>
3. Compile the acountbean. Java file in COM. Ht. servlet under the SCR directory,CodeAs follows:
Package com. Ht. servlet;
Public classAccountbean{
Private string username = "";
Private string Password = "";
Public String GetPassword (){
Return password;
}
Public void setpassword (string password ){
This. Password = password;
}
Public String GetUserName (){
Return username;
}
Public void setusername (string username ){
This. Username = username;
}
}
4. Compile the servlet checkaccount. Java file in COM. Ht. servlet under the SCR directory. The Code is as follows:
Package com. Ht. servlet;
Import java. Io. ioexception;
Import javax. servlet. servletexception;
Import javax. servlet. http. httpservlet;
Import javax. servlet. http. httpservletrequest;
Import javax. servlet. http. httpservletresponse;
Import javax. servlet. http. httpsession;
Public class checkaccount extends httpservlet {
@ Override
Protected void dopost (httpservletrequest req, httpservletresponse resp)
Throws servletexception, ioexception {
Doget (req, resp );
}
@ Override
Public void doget (httpservletrequest req, httpservletresponse resp)
Throws servletexception, ioexception {
Httpsession session = Req. getsession ();
Accountbean account = new accountbean ();
String username = Req. getparameter ("username ");
String Pwd = Req. getparameter ("PWD ");
Account. setpassword (PWD );
Account. setusername (username );
If (username! = NULL) & (username. Trim (). Equals ("jsp "))){
If (PWD! = NULL) & (PWD. Trim (). Equals ("1 "))){
System. Out. println ("success ");
Session. setattribute ("Account", account );
String login_suc = "success. jsp ";
Resp. sendredirect (login_suc );
Return;
}
}
String login_fail = "fail. jsp ";
Resp. sendredirect (login_fail );
Return;
}
}
5. After the success. jsp file is successfully written in the webroot directory, jump
<Body>
<%
Accountbean account = (accountbean) Session. getattribute ("account ");
%>
Username: <% =Account. GetUserName () %>
<Br>
Password: <% =Account. GetPassword ()%>
</Body>
6. Jump to the webroot directory after writing the fail. jsp file fails.
<Body>
Login Failed! <Br>
</Body>
7. Modify the Web. xml configuration file
<? XML version = "1.0" encoding = "UTF-8"?>
<Web-app version = "2.5"
Xmlns =" Http://java.sun.com/xml/ns/javaee "
Xmlns: xsi =" Http://www.w3.org/2001/XMLSchema-instance "
Xsi: schemalocation =" Http://java.sun.com/xml/ns/javaee
Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd ">
login. JSP
This is the description of my J2EE component
This is the display name of my J2EE component
checkaccount
COM. ht. servlet. checkaccount
<Servlet-mapping>
<Servlet-Name>Checkaccount</Servlet-Name>
<URL-pattern>/Login</Url-pattern>
</Servlet-mapping>
</Web-app>
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