【Struts 分派Action】DispatchAction
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>
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