struts1實現簡單的登陸功能（附源碼）

時間 2019-11-13

標籤 struts1 struts 實現簡單登陸功能源碼欄目 Struts 简体版

原文原文鏈接

環境：MyEclipse 14 發佈時間： 2017-04-20 21:04:55css

1 struts1 框架搭建

在MyEclipse新建web project 取名爲struts1_login，此時是一個空文檔就不截圖了而後在project上右鍵->選擇myeclipse->add struts capabilitieshtml

單擊上面Install Apache Struts(1.x)Facetjava

點擊next程序員

選擇*.do ，改下包名改爲與你項目相關的。如個人包名爲com.lichang.struts1web

點擊nextapache

點擊完成，在咱們的WEB-INF下就會多出struts-config.xml文件編程

以上就是讓myeclipse幫咱們加入框架的大概過程。項目的總體結構以下：app

至此咱們的struts1 框架搭建完成

2 接着咱們就開始編程來實現了。

web.xml 以下：框架

<?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>

而後在struts.xml配置LoginAction 代碼以下：

<?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:指定訪問時的路徑   type：指定Action所在的類（通常是：包名.類名） name：指定和哪一個表單（和jsp中Javabean
    差很少的東西）對應，該例中name就和com.lichang.struts1.LoginActionForm類對應-->
        <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代碼以下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>eclipse

<!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">

</head>

<body style="text-align:center">
<form action="login.do" method="post">
用戶：<input type="text" name="username"><br>
密碼：<input type="password" name="password"></br>
<input type="submit" value="登陸">
</form>
</body>
</html>

login_error.jsp代碼以下：

<%@ 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">
    -->

  </head>
  <body>
        <%--  
    <%=request.getAttribute("msg") %>
    --%>
    ${msg }
  </body>
</html>

login_success.jsp代碼以下：

<%@ 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">
    -->

  </head>
  
  <body>
     ${username },登陸成功
  </body>
</html>

LoginAction.java代碼以下：

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;
//這個類充當控制器
public class LoginAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        //從actionForm中獲取username和password
        LoginActionForm laf = (LoginActionForm)form;
        String username = laf.getUsername();
        String password = laf.getPassword();
        //調用業務邏輯類
        UserManager userManager = new UserManager();
        try {
            userManager.login(username, password);
            return mapping.findForward("success");
        }catch(UserNotFoundException e) {
            e.printStackTrace();
            request.setAttribute("msg", "用戶不能找到，用戶名稱=" + username );
        }catch(PasswordErrorException e) {
            e.printStackTrace();
            request.setAttribute("msg", "密碼錯誤");
        }
        return mapping.findForward("error");
    }
}

LoginActionForm.java代碼以下：

package com.lichang.struts1;

import org.apache.struts.action.ActionForm;

/**
 *
 * ActionForm(表單用於獲取用戶輸入的數據，至關於jsp中的Javabean)
 * 不過sturts1在底層上實現了一些特別的方法以致於當Java程序員定義了Javabean並繼承ActionForm並實現setXXX()方法時
 * 用戶表單中元素的值就被一一賦給咱們本身定義的變量。如public void setUsername(String username)方法就可把form中username
 * 賦給username變量
 *
 */

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代碼以下：

package com.lichang.struts1;
//這個類就是用來處理用戶登陸的業務邏輯
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代碼以下：

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代碼以下：

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
    }

}