struts实现的简单的登录

关于struts实现基本的登录步骤：

1.1导入相关的jar包

注：将这些包放入WEB-INF的lib包下，然后将包导入项目中

2.对WEB-INF包下的web.xml进行配置，引入过滤器

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
 3   <display-name></display-name>
 4   <filter>
 5     <filter-name>struts2</filter-name>
 6     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 7   </filter>
 8   <filter-mapping>
 9     <filter-name>struts2</filter-name>
10     <url-pattern>/*</url-pattern>
11   </filter-mapping>
12   <welcome-file-list>
13     <welcome-file>index.jsp</welcome-file>
14   </welcome-file-list>
15 </web-app>

3.配置好web.xml之后，在src目录下创建struts.xml文件

4.接下来就是配置struts.xml文件

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5     
 6 <struts>
 7      <!-- extends必须写，直接或者间接继承struts-default  namespace从逻辑
 8      上实现了action的模块化管理-->
 9      <package name="login" extends="struts-default" namespace="/">
10           <!-- name是请求名称；class对应action的路径名称完全限定名=包名+类名 -->
11           <action name="login" class="com.sxt.action.Login">
12                  <!-- result是结果集  name和对应action中的返回值匹配  默认是success -->
13                  <result name="success">/index.jsp</result> 
14           </action>
15      </package>
16 </struts>

5.通过上续的操作，准备步骤就做的差不多了，接下来就是实现实体类的封装，代码如下：

 1 package com.sxt.action;
 2 
 3 import com.opensymphony.xwork2.ActionSupport;
 4 
 5 @SuppressWarnings("serial")
   <!--继承父类ActionSupport-->
 6 public class Login  extends ActionSupport{
 7         private String username;
 8         private String password;
 9         public String getUsername()
10         {
11             return username;
12         }
13         public void setUsername(String username)
14         {
15             this.username = username;
16         }
17         public String getPassword()
18         {
19             return password;
20         }
21         public void setPassword(String password)
22         {
23             this.password = password;
24         }
25         //对值进行判读，如果不是设定的值，则报错，这里自己可以随意赋值
26         public String execute() throws Exception
27         {
28             if("hello".equals(this.getUsername().trim())&&"word".equals(this.getPassword().trim()))
29             {
30                 return "success";
31             }
32             else
33             {
34                 this.addFieldError("username", "username or password error!!!!");
35                 return "failer";
36             }
37         }
38         @Override
39         public void validate() {    //验证
40            
41             if(null==this.getUsername()|| "".equals(this.getUsername().trim()))
42             {
43                 this.addFieldError("username", "username request");
44             }
45             if(null==this.getPassword()||"".equals(this.getPassword().trim()))
46             {
47                 this.addFieldError("password", "password request");
48             }
49         }
50        
51 }

6.添加login.jsp

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 <%@taglib prefix="s" uri="/struts-tags" %>
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'main.jsp' starting page</title>
13     
14     <meta http-equiv="pragma" content="no-cache">
15     <meta http-equiv="cache-control" content="no-cache">
16     <meta http-equiv="expires" content="0">    
17     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
18     <meta http-equiv="description" content="This is my page">
19     <!--
20     <link rel="stylesheet" type="text/css" href="styles.css">
21     -->
22 
23   </head>
24   
25   <body>
26       <s:form action="login">
27       <s:textfield name="username" label="username"></s:textfield>
28       <s:password name="password" label="password"></s:password>
29       <s:submit name="submit"></s:submit>
30     </s:form>  
31   </body>
32 </html>

7.添加main.jsp进行输出

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'index.jsp' starting page</title>
13     <meta http-equiv="pragma" content="no-cache">
14     <meta http-equiv="cache-control" content="no-cache">
15     <meta http-equiv="expires" content="0">    
16     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
17     <meta http-equiv="description" content="This is my page">
18     <!--
19     <link rel="stylesheet" type="text/css" href="styles.css">
20     -->
21   </head>
22   
23   <body>
24     username:${requestScope.username}<br>
25     password:${requestScope.password}
26   </body>
27 </html>

8.运行结果如图：

此前我判定的账号密码是hello和word，所以此处输入hello和word，对应的如果不是自己设定的值，则会报错，运行结果如下:

一个简单的登录注册就完成了！有问题欢迎与各位探讨，这里只是实现简单的登录注册，没有连接数据库，但是自己可以试下。