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Use spring MVC to implement a complete instance of User Logon

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Author: User
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Use spring MVC to implement a complete instance for user login. In this example, create a tomcat project in eclipse to explain the whole process of spring MVC. The instance code is as follows:
<I> write a diary file under mymvc/WEB-INF/src

# Specify the size of the log input file

Log4j. appender. stdout. maxfilesize = 500kb

Log4j. appender. stdout. maxbackupindex = 50

Log4j. appender. stdout. append = true

Log4j. appender. stdout. layout = org. Apache. log4j. patternlayout

Log4j. appender. stdout. layout. conversionpattern = [%-5 p] % d {yyyy-mm-DDHH: mm: SS} % C-% m % N

# Define how log4j is displayed

Log4j. appender. A1 = org. Apache. log4j. rollingfileappender

# Specify the name of the log input file

Log4j. appender. a1.file = org. Log

# Specify the size of the log input file

Log4j. appender. a1.maxfilesize = 500kb

Log4j. appender. a1.maxbackupindex = 50

Log4j. appender. a1.append = true

Log4j. appender. a1.layout = org. Apache. log4j. patternlayout

Log4j. appender. a1.layout. conversionpattern = % d {iso8601}-[% P] [% c {1}]-% m % N

# Define how log4j is displayed

Log4j. appender. A1 = org. Apache. log4j. rollingfileappender

# Specify the name of the log input file

Log4j. appender. a1.file = GC. Log

# Specify the size of the log input file

Log4j. appender. gc. maxfilesize = 500kb

Log4j. appender. gc. maxbackupindex = 50

Log4j. appender. gc. append = true

Log4j. appender. gc. layout = org. Apache. log4j. patternlayout

Log4j. appender. gc. layout. conversionpattern = % d {iso8601}-[% P] [% c {1}]-% m % N

<2> Configure web. xml

<? XML version = "1.0" encoding = "UTF-8"?>

<Web-app xmlns = "http://java.sun.com/xml/ns/j2ee"

Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"

Version = "2.4"

Xsi: schemalocation = "http://java.sun.com/xml/ns/j2ee

Http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd>

<Servlet>

<Servlet-Name> dispatcherservlet </servlet-Name>

<Servlet-class> org. springframework. Web. servlet. dispatcherservlet </servlet-class>

<! -- Initialize parameters -->

<Init-param>

<Param-Name> contextconfiglocation </param-Name>

<Param-value>/WEB-INF/dispatcherServlet-servlet.xml </param-value>

</Init-param>

</Servlet>

<Servlet-mapping>

<Servlet-Name> dispatcherservlet </servlet-Name>

<URL-pattern> *. DO </url-pattern>

</Servlet-mapping>

<Taglib>

<Taglib-Uri>/spring </taglib-Uri>

<Taglib-location>/WEB-INF/spring. TLD </taglib-location>

</Taglib>

<Welcome-file-List>

<Welcome-File> index. jsp </welcome-File>

</Welcome-file-List>

</Web-app>

<3> compile login. jsp in the mymvc/GC/jsp directory on the logon page.

<% @ Taglib prefix = "Spring" uri = "/Spring" %>

<% @ Page contenttype = "text/html; charset = GBK" %>

<HTML>

<Head> <title> <spring: Message code = "title"/> </title>

<Body>

<Form action = "/mymvc/login. Do" name = "user" method = "Post">

<Spring: bind Path = "command. username">

<Spring: Message code = "username"> </spring: Message>

<Input type = "text" name = "$ {status. Expression}" value = "$ {status. Value}"/>

<Br>

<Font color = "red"> <B >$ {status. errormessage} </B> </font> <br>

</Spring: bind>

<Spring: bind Path = "command. Password">

<Spring: Message code = "password"> </spring: Message>

<Input type = "password" name = "$ {status. Expression}" value = "$ {status. Value}"/>

<Br>

<Font color = "red"> <B >$ {status. errormessage} </B> </font> <br>

</Spring: bind>

<Spring: bind Path = "command. password2">

<Spring: Message code = "password2"> </spring: Message>

<Input type = "password" name = "$ {status. Expression}" value = "$ {status. Value}"/>

<Br>

<Font color = "red"> <B >$ {status. errormessage} </B> </font> <br>

</Spring: bind>

<Input type = "Submit" value = "<spring: messagecode = 'submit '/>"/>

</Form>

</Body>

</Html>

<4> write success. jsp in mymvc/GC/jsp

<% @ Taglib prefix = "Spring" uri = "/Spring" %>

<% @ Page contenttype = "text/html; charset = GBK" %>

<HTML>

<Head> <title> <spring: Message code = "title"> </spring: Message> </title>

<Body>

<Spring: bind Path = "command. username">

<H3> <spring: Message code = "welcome"> </spring: Message> {status. value} <spring: Message code = "loginsuccess"/>

</Spring: bind>

</Body>

</Html>

<5> compile the bean that stores user login information and create the Java file user. Java in the com. gc. action package.

Package com. gc. Action;

Publicclass user {

Private string username = NULL;

Private string Password = NULL;

Private string password2 = NULL;

Public String GetPassword (){

Returnpassword;

}

Publicvoid setpassword (string password ){

This. Password = password;

}

Public String getpassword2 (){

Returnpassword2;

}

Publicvoid setpassword2 (string password2 ){

This. password2 = password2;

}

Public String GetUserName (){

Returnusername;

}

Publicvoid setusername (string username ){

This. Username = username;

}

}

<6> write user verification class uservalidator. Java under the com. gc. action package

Package com. gc. Action;

Import com. gc. Action. user;

Import org. springframework. validation. validator;

Import org. springframework. validation. errors;

Publicclass uservalidator implements validator {

Publicboolean supports (class clazz ){

Return clazz. Equals (user. Class );

}

Publicvoid validate (Object OBJ, errors ){

User user = (User) OBJ;

If (! "Tang". Equals (user. GetUserName ())){

Errors. rejectvalue ("username", "usernameerror", null, "incorrect user name ");

}

If (! & Quot; 123456 & quot;. Equals (user. GetPassword ())){

Errors. rejectvalue ("password", "passworderror", null, "Incorrect password ");

}

If (! User. GetPassword (). Equals (user. getpassword2 ())){

Errors. rejectvalue ("password2", "password2error", null, "two different passwords ");

}

}

}

<7> write the user logon logic login. Java in the com. gc. action package.

Package com. gc. Action;

Import java. util. Map;

Import org. Apache. log4j. Logger;

Import org. springframework. validation. bindexception;

Import org. springframework. Web. servlet. modelandview;

Import org. springframework. Web. servlet. MVC. simpleformcontroller;

Publicclass login extends simpleformcontroller {

Private logger = logger. getlogger (this. getclass (). getname ());

Public modelandview onsubmit (Object command, bindexception errors) throws exception {

User user = (User) command;

Map modle = errors. GetModel ();

Modle. Put ("user", user );

Returnnew modelandview (getsuccessview (), modle );

}

}

<8> write configuration file WEB-INF under mymvc/dispatcherServlet-servlet.xml directory

<? XML version = "1.0" encoding = "UTF-8"?>

<! Doctype beans public "-// spring // DTD bean // en"

"Http: www.springframework.org/dtd/spring-bean.dtd">

<Beans>

<! -- Define international messages -->

<Bean id = "messagesource" class = "org. springframework. Context. Support. resourcebundlemessagesource">

<Property name = "basename">

<Value> messages </value>

</Property>

</Bean>

<! -- Define ing -->

<Bean id = "urlmapping" class = "org. springframework. Web. servlet. handler. simpleurlhandlermapping">

<Property name = "mapping">

<Props>

<Prop key = "login. Do"> login </prop>

</Props>

</Property>

</Bean>

<! -- Define view and path -->

<Bean id = "viewresolver" class = "org. springframework. Web. servlet. View. internalresourceviewresolver">

<Property name = "viewclass">

<Value> org. springframework. Web. servlet. View. internalresourceview </value>

</Property>

<! -- JSP are placed in the WEB-INF/jsp directory -->

<Property name = "prefix">

<Value>/WEB-INF/jsp </value>

</Property>

<! -- JSP page suffixes are all four. jsp -->

<Property name = "suffix">

<Value>. jsp </value>

</Property>

</Bean>

<! -- Define Controller -->

<Bean id = "login" class = "com. gc. Action. login">

<Property name = "commandclass">

<Value> com. gc. Action. User </value>

</Property>

<! -- Specify the verification class -->

<Property name = "validator">

<Ref bean = "uservalidator"/>

</Property>

<! -- Specify the page to be returned for failure -->

<Property name = "formview">

<Value> login </value>

</Property>

<Property name = "successview">

<Value> success </value>

</Property>

</Bean>

<! -- Define the verification class -->

<Bean id = "uservalidator" class = "com. gc. Action. uservalidator"> </bean>

</Beans>

<9> write the resource file messages. properties and messages_en_us.properties in the mymvc/WEB-INF/src directory.
Messages. Properties

Title = springmvc instance

Username = enter the User Name:

Password = enter the password:

Password2 = Confirm Password:

Submit = submit

Welcome = welcome

Loginsuccess = logon successful

Usernameerror = incorrect user name

Passworderror = incorrect password

Doublepassword = two different passwords
After native2ascii tool Transcoding

Title = springmvc/u5b9e/u4f8b

Username =/u8f93/u5165/u7528/u6237/u540d:

Password =/u8f93/u5165/u5bc6/u7801:

Password2 =/u786e/u8ba4/u5bc6/u7801:

Submit =/u63d0/u4ea4

Welcome =/u6b22/u8fce

Loginsuccess =/u767b/u5f55/u6210/u529f

Usernameerror =/u7528/u6237/u540d/u4e0d/u6b63/u786e

Passworderror =/u5bc6/u7801/u4e0d/u6b63/u786e

Doublepassword = 2/u6b21/u5bc6/u7801/u4e0d/u4e00/u81f4
Messages_en_us.properties

Title = springmvc

Username = Username

Password = Password

Password2 = password2

Submit = submit

Welcome = welcome

Loginsuccess = loginsuccess

Usernameerror = usernameerror

Passworderror = passworderror

Doublepassword = doublepassworderror

This article from: http://fangyong2006.javaeye.com/blog/117563

 

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Related Keywords:
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