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這期內(nèi)容當中小編將會給大家?guī)碛嘘P使用struts1如何實現(xiàn)一個登錄功能,文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
環(huán)境:MyEclipse 14
1 struts1 框架搭建
在MyEclipse新建web project 取名為struts1_login,此時是一個空文檔就不截圖了然后在project上右鍵->選擇myeclipse->add struts capabilities
單擊上面Install Apache Struts(1.x)Facet
點擊next
選擇*.do ,改下包名改成與你項目相關的。如我的包名為com.lichang.struts1
點擊next
點擊完成,在我們的WEB-INF下就會多出struts-config.xml文件
以上就是讓myeclipse幫我們加入框架的大概過程。項目的整體結構如下:
至此我們的struts1 框架搭建完成2 接著我們就開始編程來實現(xiàn)了。
2 接著我們就開始編程來實現(xiàn)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 代碼如下:
<?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:指定訪問時的路徑 type:指定Action所在的類(一般是:包名.類名) name:指定和哪個表單(和jsp中Javabean 差不多的東西)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代碼如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html > <head > <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 > <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="登錄"> </form> </body> </html>
login_error.jsp代碼如下:
<%@ 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代碼如下:
<%@ 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 },登錄成功 </body> </html>
LoginAction.java代碼如下:
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; //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(diào)用業(yè)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代碼如下:
package com.lichang.struts1; import org.apache.struts.action.ActionForm; /** * * ActionForm(表單用于獲取用戶輸入的數(shù)據(jù),相當于jsp中的Javabean) * 不過sturts1在底層上實現(xiàn)了一些特別的方法以至于當Java程序員定義了Javabean并繼承ActionForm并實現(xiàn)setXXX()方法時 * 用戶表單中元素的值就被一一賦給我們自己定義的變量。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代碼如下:
package com.lichang.struts1; //這個類就是用來處理用戶登錄的業(yè)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代碼如下:
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 } }
運行部分截圖
登錄界面
用戶名不存在
上述就是小編為大家分享的使用struts1如何實現(xiàn)一個登錄功能了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業(yè)資訊頻道。
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