1./WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<!--
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<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" "http://www.springframework.org/dtd/spring-beans.dtd">
<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="http://www.springframework.org/tags"%>
<%@ 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">${status.errorMessage}</font><br>
</spring:bind>
<input type="submit" value="確定"/>
</form>
注意：輸入錯誤會再回到這個頁面中。
</body>
</html>
4./index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
begin......
<%
response.sendRedirect("login.do");
%>
</body>
</html>
5./success.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head><title>Login Success</title></head>
<body>
<H1><c:out value="用戶名﹕${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;
}
}