1./WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
?xmlns="?xmlns:xsi="?xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
?<!--
<!DOCTYPE web-app
??? PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
??? "<web-app>
-->
?
?<!--
?<context-param>
??? ?<param-name>contextConfigLocation</param-name>
??? ?<param-value>/WEB-INF/application-servlet.xml</param-value>
? ?</context-param>
?<listener>
???? <listener-class>
?????? org.springframework.web.context.ContextLoaderListener
???? </listener-class>
? ?</listener>
? ?-->
?<servlet>
??????? <servlet-name>hello</servlet-name>
??????? <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>??
??<init-param>
????????? <param-name>contextConfigLocation</param-name>
????????? <param-value>/WEB-INF/application-servlet.xml</param-value>
???? ?</init-param>
??<load-on-startup>1</load-on-startup>
??? </servlet>
?
??? <servlet-mapping>
??????? <servlet-name>hello</servlet-name>
??????? <url-pattern>*.do</url-pattern>
??? </servlet-mapping>
?
<!--
?<taglib>
???? ?<taglib-uri>/spring</taglib-uri>
???? ?<taglib-location>/WEB-INF/spring.tld</taglib-location>
?</taglib>
-->?
</web-app>
2./WEB-INF/application-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "<beans>
??? <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
??????? <property name="mappings">
??????????? <props>
??????????????? <prop key="/login.do">loginAction</prop>
??????????? </props>
??????? </property>
??? </bean>
???
??? <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
??????? <property name="viewClass">
??????????? <value>org.springframework.web.servlet.view.JstlView</value>
??????? </property>
??????? <property name="prefix">
??????????? <value>/</value>
??????? </property>
??????? <property name="suffix">
??????????? <value>.jsp</value>
??????? </property>
??? </bean>
???
??? <bean id="loginAction" class="onlyfun.caterpillar.LoginAction">
??????? <property name="commandName">
??????? ?<value>command</value>
??</property>
??<property name="commandClass">
??????????? <value>onlyfun.caterpillar.LoginForm</value>
??????? </property>
??????? <property name="successView">
??????????? <value>success</value>
??????? </property>
??????? <property name="formView">
??????????? <value>form</value>
??????? </property>
???????<property name="user">??????????
????????????<ref local="user" />
??????? </property>
??? </bean>?
???
???<bean id="user" class="onlyfun.caterpillar.User">
?????<property name="username">
??????? ?<value>111</value>
?????</property>
?????<property name="password">
??????? ?<value>111</value>
?????</property>
????</bean>
</beans>
3./form.jsp
<%@taglib prefix="spring" uri=">
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head><title>Login</title></head>
<body>
?<spring:bind path="command.*">
??????? <font color="red"><b>${status.errorMessage}</b></font><br>
??? </spring:bind>
?? ? ??請輸入使用者名稱與密碼：<p>?? ?
??? <form name="loginform" action="login.do" method="post">
???? <spring:bind path="command.username">??
???????? ?名稱 <input type="text" name="${status.expression}" value="${status.value}"/>
???????? ?<font color="red">${status.errorMessage}</font><br>
???? </spring:bind>
???? <spring:bind path="command.password">?
???????? ?密碼 <input type="password" name="${status.expression}" value="${status.value}"/>
???????? ?<font color="red">${status.errorMessage}</font><br>
???? </spring:bind>
??????? <input type="submit" value="確定"/>
??? </form>
? ??? 注意：輸入錯誤會再回到這個頁面中。 ?
</body>
</html>
4./index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
? <head>
? </head>
? <body>??
??? begin......
??? <%
???? response.sendRedirect("login.do");
??? %>
? </body>
</html>
5./success.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri=">
<html>
<head><title>Login Success</title></head>
<body>
??? <H1><c:out value="用戶名﹕${user}"/></H1>
</body>
</html>
6./WEB-INF/classes/onlyfun/caterpillar/LoginAction.class
package onlyfun.caterpillar;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.*;
public class LoginAction extends SimpleFormController {?
????private User user;
??? protected ModelAndView onSubmit(Object command,BindException errors) throws Exception {
?????? LoginForm form = (LoginForm) command;?
???????String username = user.getUsername();
?????? String password = user.getPassword();
?????? if(username.equals(form.getUsername()) &&
??? ???? password.equals(form.getPassword())) {
????????? return new ModelAndView(this.getSuccessView(),"user", form.getUsername());
?????? }
?????? else {
??? ??? errors.reject("loginfail", "使用者名稱或密碼錯誤");
??? ??? if(!(username.equals(form.getUsername()))){
??? ???? errors.rejectValue("username", "error", null, "使用者名稱錯誤");
??? ??? }
??? ???if(!(password.equals(form.getPassword()))){
??? ???? errors.rejectValue("password", "error", null, "密碼錯誤");
??? ??? }?? ???
?????????? return new ModelAndView(this.getFormView(),errors.getModel());
?????? }
??? }
????public User getUser() {
?????return user;
????}
????public void setUser(User user) {
?????this.user = user;
????}
}
7./WEB-INF/classes/onlyfun/caterpillar/LoginForm.class
package onlyfun.caterpillar;
public class LoginForm {
??? private String username;
??? private String password;
???
??? public void setUsername(String username) {
?????? this.username = username;
??? }
???
??? public void setPassword(String password) {
?????? this.password = password;
??? }
???
??? public String getUsername() {
?????? return username;
??? }
???
??? public String getPassword() {
?????? return password;
??? }
}
8./WEB-INF/tags/spring.tld
9./WEB-INF/tags/c.tld
10./WEB-INF/classes/onlyfun/caterpillar/User.class
package onlyfun.caterpillar;
public class User {
?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;
?}
}