Struts2:one

Struts2：mvc形式框架

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>租房-用户登录</title>

<LINK rel=stylesheet type=text/css href="images/style.css">
</head>

<BODY>
	<DIV id=header class=wrap>

		<DIV id=logo>
			<IMG src="images/logo.gif" width="193px;" height="74px;">
		</DIV>
	</DIV>

	<DIV id=regLogin class=wrap>
		<DIV class=dialog>
			<DIV class=box>
				<H4>用户登录</H4>

				<FORM id=user method="post" action="LoginAction">


					<DIV class=infos>
						<TABLE class=field>
							<TBODY>
								<TR>
									<TD colSpan=2></TD>
								</TR>
								<TR>
									<TD class=field>用 户 名：</TD>
									<TD><input type="text" class="text"
										name="loginUser.userId" /></TD>
								</TR>
								<TR>
									<TD class=field>密 码：</TD>
									<TD><input type="password" class="text"
										name="loginUser.userName" /></TD>
								</TR>

							</TBODY>
						</TABLE>
						<DIV class=buttons>

							<input type="submit" value="登录"> <INPUT
								onclick='document.location="regs.htm"' value=取消 type=button>

						</DIV>
					</DIV>

				</FORM>
			</DIV>
		</DIV>
	</DIV>
	<DIV id=footer class=wrap>
		<DL>
			<DT>神君租房 © 2010 九天神君 京ICP证1000001号</DT>
			<DD>关于我们 -联系方式 -意见反馈-帮助中心</DD>
		</DL>
	</DIV>
</BODY>

</HTML>

首先，一个前端的登陆请求发往后端

<!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>
	<display-name>Archetype Created Web Application</display-name>
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>
			org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
		</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

进入过滤器

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" 
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<package name="default" namespace="/" extends="struts-default">


		<interceptors>
			<interceptor name="myInterceptor" class="com.hc.dao.HcIntercept"></interceptor>
		</interceptors>

<!-- <default-action-ref name="HousesAction"></default-action-ref> -->

		<action name="DeleteAction" class="com.hc.action.UpdateAction"
			method="delete">
			<result type="redirectAction">AdminAction</result>
		</action>

		<action name="AdminAction" class="com.hc.action.AdminAction"
			method="admin">
			<result>admin.jsp</result>
		</action>

		<action name="AlterAction" class="com.hc.action.UpdateAction"
			method="alter">
			<result>update.jsp</result>
		</action>

		<action name="UpdateAction" class="com.hc.action.UpdateAction"
			method="update">
			<interceptor-ref name="defaultStack"></interceptor-ref>
			<interceptor-ref name="token"></interceptor-ref>
			<result type="redirectAction">AdminAction</result>
			<result name="invalid.token" type="redirectAction">AdminAction</result>
		</action>

		<action name="RegisterAction" class="com.hc.action.AddAction"
			method="register">
			<interceptor-ref name="defaultStack"></interceptor-ref>
			<interceptor-ref name="token"></interceptor-ref>
			<result>login.jsp</result>
			<result name="invalid.token">register.jsp</result>
		</action>

		<action name="AddAction" class="com.hc.action.AddAction"
			method="add">
			<interceptor-ref name="defaultStack"></interceptor-ref>
			<interceptor-ref name="token"></interceptor-ref>
			<result type="redirectAction">HousesAction</result>
			<result name="invalid.token">add.jsp</result>
		</action>

		<action name="LoginAction" class="com.hc.action.LoginAction"
			method="login">
			<result name="SUCCESS" type="redirectAction">HousesAction</result>
			<result name="INPUT">/login.jsp</result>
		</action>

		<action name="HousesAction" class="com.hc.action.HousesAction"
			method="houses">
			<!-- <result>houses.jsp</result> -->
			<result>index.jsp</result>
		</action>

		<action name="DetailsAction" class="com.hc.action.DetailsAction"
			method="details">
			<interceptor-ref name="defaultStack"></interceptor-ref>
			<interceptor-ref name="myInterceptor"></interceptor-ref>
			<result name="login">login.jsp</result>
			<result>details.jsp</result>
		</action>

	</package>

</struts>

进入所配置的路径内

package com.hc.action;

import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.hc.dao.HouseDao;
import com.hc.entity.User;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {

	HttpSession session = ServletActionContext.getRequest().getSession();
	private User loginUser;

	public String login() {

		String succ = "INPUT";

		if (HouseDao.doLogin(loginUser)) {

			session.setAttribute("loginUser", loginUser);

			succ = "SUCCESS";
		}
		return succ;

	}

	public User getLoginUser() {
		return loginUser;
	}

	public void setLoginUser(User loginUser) {
		this.loginUser = loginUser;
	}

}

action调用dao方法，判断此用户信息是否正确，是否是系统用户

dao连接数据库，进行SQL形式查询操作

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