struts1实现简单的登录功能实例（附源码）

2019-11-26 12:31:48

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来源：转载

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环境：MyEclipse 14

1 struts1 框架搭建

在MyEclipse新建web project 取名为struts1_login，此时是一个空文档就不截图了然后在project上右键->选择myeclipse->add struts capabilities

单击上面Install Apache Struts(1.x)Facet

点击next

选择*.do ，改下包名改成与你项目相关的。如我的包名为com.lichang.struts1

点击next

点击完成，在我们的WEB-INF下就会多出struts-config.xml文件

以上就是让myeclipse帮我们加入框架的大概过程。项目的整体结构如下：

至此我们的struts1 框架搭建完成2 接着我们就开始编程来实现了。

2 接着我们就开始编程来实现了。

web.xml 如下：

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>struts1_login</display-name> <welcome-file-list>  <welcome-file>index.html</welcome-file>  <welcome-file>index.htm</welcome-file>  <welcome-file>index.jsp</welcome-file>  <welcome-file>default.html</welcome-file>  <welcome-file>default.htm</welcome-file>  <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet>  <servlet-name>action</servlet-name>  <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>  <init-param>   <param-name>config</param-name>   <param-value>/WEB-INF/struts-config.xml</param-value>  </init-param>  <init-param>   <param-name>debug</param-name>   <param-value>3</param-value>  </init-param>  <init-param>   <param-name>detail</param-name>   <param-value>3</param-value>  </init-param>  <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping>  <servlet-name>action</servlet-name>  <url-pattern>*.do</url-pattern> </servlet-mapping></web-app>

然后在struts.xml配置LoginAction 代码如下：

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"><struts-config>  <form-beans>    <form-bean name="loginForm" type="com.lichang.struts1.LoginActionForm"/>  </form-beans>    <action-mappings>  <!-- path:指定访问时的路径  type：指定Action所在的类（一般是：包名.类名） name：指定和哪个表单（和jsp中Javabean  差不多的东西）对应，该例中name就和com.lichang.struts1.LoginActionForm类对应-->    <action path="/login"         type="com.lichang.struts1.LoginAction"        name="loginForm"            scope="request"            >      <forward name="success" path="/login_success.jsp" />      <forward name="error" path="/login_error.jsp"/>        </action>  </action-mappings> <message-resources parameter="com.lichang.struts1.ApplicationResources" /> </struts-config>

index.jsp代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html style="text-align:center"> <head style="text-align:center"> <title>index page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0">  <!--<link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" > --> </head> <body style="text-align:center"> <form action="login.do" method="post">用户：<input type="text" name="username"><br>密码：<input type="password" name="password"></br> <input type="submit" value="登录"> </form> </body></html>

login_error.jsp代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>    <title>error page</title>  <meta http-equiv="pragma" content="no-cache">  <meta http-equiv="cache-control" content="no-cache">  <meta http-equiv="expires" content="0">    <!--  <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >  --> </head> <body>    <%--   <%=request.getAttribute("msg") %>  --%>  ${msg } </body></html>

login_success.jsp代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>  <title>success page</title>  <meta http-equiv="pragma" content="no-cache">  <meta http-equiv="cache-control" content="no-cache">  <meta http-equiv="expires" content="0">      <!--  <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >  --> </head>  <body>   ${username },登录成功 </body></html>

LoginAction.java代码如下：

package com.lichang.struts1;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;//这个类充当控制器public class LoginAction extends Action {  public ActionForward execute(ActionMapping mapping, ActionForm form,      HttpServletRequest request, HttpServletResponse response)      throws Exception {    //从actionForm中获取username和password    LoginActionForm laf = (LoginActionForm)form;    String username = laf.getUsername();    String password = laf.getPassword();    //调用业务逻辑类    UserManager userManager = new UserManager();    try {      userManager.login(username, password);      return mapping.findForward("success");    }catch(UserNotFoundException e) {      e.printStackTrace();      request.setAttribute("msg", "用户不能找到，用户名称=" + username );    }catch(PasswordErrorException e) {      e.printStackTrace();      request.setAttribute("msg", "密码错误");    }    return mapping.findForward("error");  }}

LoginActionForm.java代码如下：

package com.lichang.struts1;import org.apache.struts.action.ActionForm;/** * * ActionForm(表单用于获取用户输入的数据，相当于jsp中的Javabean) * 不过sturts1在底层上实现了一些特别的方法以至于当Java程序员定义了Javabean并继承ActionForm并实现setXXX()方法时 * 用户表单中元素的值就被一一赋给我们自己定义的变量。如public void setUsername(String username)方法就可把form中username * 赋给username变量 * */public class LoginActionForm extends ActionForm {    private String username;    private String password;  public String getUsername() {    return username;  }  public void setUsername(String username) {    this.username = username;  }  public String getPassword() {    return password;  }  public void setPassword(String password) {    this.password = password;  }      }

UserManager.java代码如下：

package com.lichang.struts1;//这个类就是用来处理用户登录的业务逻辑public class UserManager {  public void login(String username, String password) {    if (!"admin".equals(username)) {      throw new UserNotFoundException();     }        if (!"admin".equals(password)) {      throw new PasswordErrorException();    }      }}

UserNotFoundException.java代码如下：

package com.lichang.struts1;public class UserNotFoundException extends RuntimeException {  public UserNotFoundException() {    // TODO Auto-generated constructor stub  }  public UserNotFoundException(String message) {    super(message);    // TODO Auto-generated constructor stub  }  public UserNotFoundException(Throwable cause) {    super(cause);    // TODO Auto-generated constructor stub  }  public UserNotFoundException(String message, Throwable cause) {    super(message, cause);    // TODO Auto-generated constructor stub  }}

PasswordErrorException.java代码如下：

package com.lichang.struts1;public class PasswordErrorException extends RuntimeException {  public PasswordErrorException() {    // TODO Auto-generated constructor stub  }  public PasswordErrorException(String message) {    super(message);    // TODO Auto-generated constructor stub  }  public PasswordErrorException(Throwable cause) {    super(cause);    // TODO Auto-generated constructor stub  }  public PasswordErrorException(String message, Throwable cause) {    super(message, cause);    // TODO Auto-generated constructor stub  }}

运行部分截图

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