A wap1.0-based Web project (text)-implement login verification

Last Update:2018-12-05 Source: Internet

Author: User

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1. Create a new web project, named "wapdemo1 ".

2. Create four packages, Po, Dao, service and action.

--
3. Create a new class user in packages Po, define its attributes uname and passwd.
====
Package po;

Public class user {
Private string uname;
Private string passwd;

Public String getuname (){
Return uname;
}
Public void setuname (string uname ){
This. uname = uname;
}
Public String getpasswd (){
Return passwd;
}
Public void setpasswd (string passwd ){
This. passwd = passwd;
}

}
====
4. Create a New detabase dB in packages, Dao for demo.
====
Package Dao;

Import java. util. arraylist;
Import java. util. List;
Import Po. user;

Public class dB {
Private Static list <user> listuser = new arraylist <user> ();

Static {
User u = new user ();
U. setuname ("admin ");
U. setpasswd ("123 ");
Listuser. Add (U );
}

Public static list <user> getlistuser (){
Return listuser;
}
Public static void setlistuser (list <user> listuser ){
DB. listuser = listuser;
}
}
====

5. Create a new class userdao in packages Dao.

===
Package Dao;

Import java. util. arraylist;
Import java. util. List;
Import Po. user;

Public class userdao {
Public list <user> queryuserdao (User user ){
List <user> List = new arraylist <user> ();
List <user> dblist = dB. getlistuser ();

For (INT I = 0; I <dblist. Size (); I ++ ){
User u = dblist. Get (I );
If (U. getuname (). Trim (). Equals (user. getuname (). Trim ())
& U. getpasswd (). Trim (). Equals (user. getpasswd (). Trim ())){
List. Add (U );
}
}
Return list;
}
}

====

6. Create a new class userservcie in packages service.

====
Package Service;

Import java. util. List;
Import Po. user;
Import Dao. userdao;

Public class userservice {
Public Boolean loginuserservcie (User user ){
Userdao UD = new userdao ();
List <user> List = Ud. queryuserdao (User );
If (list. Size () <1 | list = NULL ){
Return false;
} Else {
Return true;
}

}
}

====
7. Create a new class useraction in packages action.

====
Package action;

Import java. Io. ioexception;
Import javax. servlet. servletexception;
Import javax. servlet. http. httpservlet;
Import javax. servlet. http. httpservletrequest;
Import javax. servlet. http. httpservletresponse;
Import Po. user;
Import service. userservice;

Public class useraction extends httpservlet {

@ Override
Protected void doget (httpservletrequest req, httpservletresponse resp)
Throws servletexception, ioexception {
This. dopost (req, resp );
}

@ Override
Protected void dopost (httpservletrequest req, httpservletresponse resp)
Throws servletexception, ioexception {
User user = new user ();
String uname = Req. getparameter ("uname ");
String passwd = Req. getparameter ("passwd ");

User. setuname (uname );
User. setpasswd (passwd );

Userservice US = new userservice ();
Boolean flog = us. loginuserservcie (User );
System. Out. println ("sh22222si ");
If (flog = true)
Resp. sendredirect ("success. WML ");
Else
Resp. sendredirect ("error. WML ");
}
}
====

8. Create a Web login. jsp
====
<% @ Page Language = "Java" contenttype = "text/vnd. WAP. WML; charset = UTF-8" %> <? XML version = "1.0"?>
<! Doctype WML public "-// wapforum // dtd wml 1.1 //" http://www.wapforum.org/DTD/wml_1.1.xml ">
<WML>

<Head> userlogin

<Card id = "login" Title = "userlogin">
<P align = "center">
Username: <input name = "uname" type = "text"/> <br/>
Password: <input name = "passwd" type = "password"/> <br/>

</WML>
====
9. Create a web success. WML
====
<? XML version = "1.0"?>
<! Doctype WML public "-// wapforum // dtd wml 1.1 //" http://www.wapforum.org/DTD/wml_1.1.xml ">
<WML>
<Head> display page <Card id = "success" Title = "success">
<P align = "center">
Success. WML
</P>
</Card>
</WML>
====
10. Create a web error. WML
====
<? XML version = "1.0"?>
<! Doctype WML public "-// wapforum // dtd wml 1.1 //" http://www.wapforum.org/DTD/wml_1.1.xml ">
<WML>
<Head> display page <Card id = "error" Title = "error">
<P align = "center">
Error
</P>
</Card>
</WML>
====
11. Configure the Web. xml
=
<? 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>
<Welcome-file-List>
<Welcome-File> index. jsp </welcome-File>
</Welcome-file-List>

<Servlet>
<Servlet-Name> login </servlet-Name>
<Servlet-class> com. wapdemo. Action. useraction </servlet-class>
</Servlet>

<Servlet-mapping>
<Servlet-Name> login </servlet-Name>
<URL-pattern>/login. Action </url-pattern>
</Servlet-mapping>

</Web-app>
====
12. Test

Enter the correct admin; 123

Input error 123; 123

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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