MVC循序渐进(struts实现的登录)（五）

MVC循序渐进(环境篇) eclipse+tomcat（一）

MVC循序渐进(jsp model1实现的登录)（二）

MVC循序渐进(jsp model2实现的登录)（三）

MVC循序渐进(webwork实现的登录)（四）

为了以后比较分析，我把所有的实现代码放到一个web应用程序中，所以看这篇文章前请看以上系列文章。

一、安装struts

http://struts.apache.org/download.cgi 下载最新版本的jakarta-struts-1.2.4.zip解压

我们用到的jar包

lib目录下所有jar包 拷贝到WEB-INF/lib 文件夹下。

二、配置

webapp\WEB-INF\web.xml

webapp\WEB-INF\struts-config.xml

webapp\WEB-INF\web.xml

***************************************************************

<?xml version="1.0" encoding="ISO-8859-1"?>

<!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>Examples</display-name>

<description>Examples. </description>

<servlet>

<servlet-name>webwork</servlet-name>

<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet>

<servlet-name>LoginServlet</servlet-name>

<servlet-class>model2.LoginServlet</servlet-class>

</servlet>

<servlet>

<servlet-name>action</servlet-name>

<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

<init-param>

<param-name>config/struts</param-name>

<param-value>/WEB-INF/struts-config.xml</param-value>

</init-param>

<init-param>

<param-name>debug</param-name>

<param-value>2</param-value>

</init-param>

<init-param>

<param-name>detail</param-name>

<param-value>2</param-value>

</init-param>

<load-on-startup>2</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>webwork</servlet-name>

<url-pattern>*.webwork</url-pattern>

</servlet-mapping>

<servlet-mapping>

<servlet-name>action</servlet-name>

<url-pattern>*.struts</url-pattern>

</servlet-mapping>

<servlet-mapping>

<servlet-name>LoginServlet</servlet-name>

<url-pattern>/model2/LoginServlet</url-pattern>

</servlet-mapping>

<taglib>

<taglib-uri>webwork</taglib-uri>

<taglib-location>/WEB-INF/lib/webwork-2.1.7.jar</taglib-location>

</taglib>

</web-app>

***************************************************************

webapp\WEB-INF\struts-config.xml

***************************************************************

<?xml version="1.0" encoding="iso-8859-1"?>

<!DOCTYPE struts-config PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"

"http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>

<data-sources />

<form-beans>

<form-bean name="loginForm" type="struts.LoginForm" />

</form-beans>

<global-exceptions />

<global-forwards/>

<action-mappings>

<action path="/login"

type="struts.LoginAction"

name="loginForm" scope="request">

<forward name="error" path="/login.jsp" />

<forward name="succeed" path="/succeed.jsp" />

</action>

</action-mappings>

<message-resources parameter="MessageResources" />

</struts-config>

***************************************************************

三、程序

webapp\WEB-INF\src\struts\ LoginForm.java

webapp\WEB-INF\src\struts\ LoginAction.java

webapp\struts\login.jsp

webapp\struts\ succeed.jsp

webapp\WEB-INF\src\struts\ LoginForm.java

***************************************************************

package struts;

import org.apache.struts.action.ActionForm;

public class LoginForm extends ActionForm {

private String username;

private String password;

public void setUsername(String username) {

this.username = username;

}

public String getUsername() {

return this.username;

}

public void setPassword(String password) {

this.password = password;

}

public String getPassword() {

return this.password;

}

}

***************************************************************

webapp\WEB-INF\src\struts\ LoginAction.java

***************************************************************

package struts;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

public class LoginAction extends Action {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

throws Exception {

boolean isSucceed = false;

String msg = "";

String username = ((LoginForm) form).getUsername();

String password = ((LoginForm) form).getPassword();

if (username != null) {

System.out.println("登陆处理开始.........");

username = username.trim();

password = password.trim();

if (username.equals("") && username.equals("")) {

isSucceed = false;

msg = "用户名或密码为空";

} else {

isSucceed = true;

}

if (isSucceed) {

if (username.equals("zkjbeyond")

&& password.equals("zkjbeyond")) {

isSucceed = true;

HttpSession session = request.getSession();

msg = "登陆成功";

session.setAttribute("username", username);

} else {

isSucceed = false;

msg = "用户名密码不正确";

}

}

} else {

isSucceed = false;

msg = "请输入用户名密码";

}

System.out.println(username);

System.out.println(msg + isSucceed);

System.out.println("登陆处理结束.........");

if (isSucceed) {

return mapping.findForward("succeed");

} else {

request.setAttribute("msg", msg);

return mapping.findForward("error");

}

}

}

***************************************************************

webapp\struts\login.jsp

***************************************************************

<%@ page language="java" pageEncoding="GB2312" %>

<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">

<html>

<head>

<title>Lomboz JSP</title>

</head>

<%

//request.setCharacterEncoding("GBK");

Object obj=request.getAttribute("msg");

String msg="";

if(obj!=null)

msg=obj.toString();

%>

<body bgcolor="#FFFFFF">

<form action="login.struts" method="post">

<div>

<span style="width:70;">用户名：</span>

<span><input type="text" name="username"></span>

</div>

<div>

<span style="width:70;">密 码：</span>

<span><input type="password" name="password"></span>

</div>

<div>

<span style="width:70;"></span>

<span><input type="submit"></span>

</div>

<div style="color:red;">

<%

if(!msg.equals(""))

out.println(msg);

%>

</div>

</form>

</body>

</html>

***************************************************************

webapp\struts\ succeed.jsp

***************************************************************

<%@ page language="java" pageEncoding="GB2312" %>

<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">

<html>

<head>

<title>succeed</title>

</head>

<body bgcolor="#FFFFFF">

<%

Object username=session.getAttribute("username");

if(username!=null)

out.println("用户名为："+username);

else

response.sendRedirect("login.jsp");

%>

</body>

</html>

***************************************************************

http://localhost:8080/webapp/struts/login.jsp 访问

• ·让你电脑上的不再有盗版软件——解决方案
• ·MAX SDK的INode的变换矩阵,以及Ob
• ·一个写给Notebook用户的小程序 IpAd
• ·整合以内容为基础的Portlet
• ·这是原来写的如何判断点与有向线段关系的程序，有
• ·在Windows中从DC读取文本行高的问题
• ·一个ASP（JScript）简单SQL语句构建
• ·[Perl]FTP自动上传文件的脚本以及配置文
• ·Linux下GetModuleFileName
• ·A simple class for conv