LoginAction
package k.action; import k.form.UserForm; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.actions.DispatchAction; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class LoginAction extends DispatchAction { public ActionForward userLogin(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { return mapping.findForward("login"); } public ActionForward doUserLogin(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { UserForm userForm = (UserForm) form; if ("1".equals(userForm.getPassword())) { return mapping.findForward("ok"); } else { return mapping.findForward("err"); } } public ActionForward userLoginOut(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { request.getSession().invalidate(); System.out.println("userLoginOut"); return mapping.findForward("login"); } public ActionForward userLoginOut2(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { request.getSession().invalidate(); System.out.println("userLoginOut2"); return mapping.findForward("login"); } }
struts-config.xml
<?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="userForm" type="k.form.UserForm"></form-bean> </form-beans> <action-mappings> <action name="userForm" path="/login" parameter="action" type="k.action.LoginAction" scope="request" attribute="userForm" input="index.jsp" validate="false"> <forward name="ok" path="/WEB-INF/jsp/ok.jsp"></forward> <forward name="err" path="/WEB-INF/jsp/err.jsp"></forward> <forward name="login" path="/WEB-INF/jsp/login.jsp"></forward> </action> </action-mappings> </struts-config>
login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>登录页面</h1> <form action="${APP_PATH}/login.do?action=doUserLogin" method="post"> 账号：<input type="text" name="userName" value="11哈哈"> <br> 密码： <input type="password" name="password" value="1"> <br> <input type="submit" value="submit"> <br> </form> </body> </html>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <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> <load-on-startup>2</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>EncodingFilter</filter-name> <filter-class>k.filter.EncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>EncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <display-name>StartSystemListener</display-name> <listener-class>k.filter.StartSystemListener</listener-class> </listener> </web-app>
EncodingFilter
package k.filter; import javax.servlet.*; import javax.servlet.http.HttpServlet; import java.io.IOException; public class EncodingFilter extends HttpServlet implements Filter { @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { servletRequest.setCharacterEncoding("utf-8"); servletResponse.setCharacterEncoding("utf-8"); // System.out.println("========== set utf-8 ok =========="); filterChain.doFilter(servletRequest, servletResponse); } @Override public void init(FilterConfig filterConfig) throws ServletException { } }
StartSystemListener
package k.filter; import javax.servlet.ServletContext; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; public class StartSystemListener implements ServletContextListener { @Override public void contextInitialized(ServletContextEvent sce) { //1.将项目上下文路径(request.getContextPath())放置到application域中. ServletContext application = sce.getServletContext(); String app_path = application.getContextPath(); application.setAttribute("APP_PATH", app_path); System.out.println("========== APP_PATH = " + app_path); WebHelper.setApp_Path(app_path); } @Override public void contextDestroyed(ServletContextEvent sce) { } }
WebHelper
package k.filter; public class WebHelper { public static String getApp_Path() { return APP_PATH; } public static void setApp_Path(String appPath) { APP_PATH = appPath; } private static String APP_PATH = ""; }
UserForm
package k.form; import org.apache.struts.action.ActionForm; public class UserForm extends ActionForm { private String name; private String password; public UserForm() { } public UserForm(String name, String password) { this.name = name; this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
err.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>登录失败</h1> <a href="${APP_PATH}/login.do?action=userLogin">返回登录</a> </body> </html>
ok.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>登录失败</h1> <a href="${APP_PATH}/login.do?action=userLogin">返回登录</a> </body> </html>
index,jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>$Title$</title> </head> <body> <jsp:forward page="WEB-INF/jsp/login.jsp"></jsp:forward> </body> </html>