一 为什么需要分派action
二 快速入门
1、创建一个web工程
2、引入struts并配置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="com.yourcompany.struts.form.UserForm" />
</form-beans>
<global-exceptions />
<global-forwards />
<!-- parameter用于区分用户的不同的请求 -->
<action-mappings >
<action
attribute="userForm"
input="/WEB-INF/login.jsp"
name="userForm"
parameter="flag"
path="/loginandLogout"
scope="request"
type="com.yourcompany.struts.action.LoginandLogoutAction"
cancellable="true" >
<forward name="loginok" path="/WEB-INF/ok.jsp" />
<forward name="gologin" path="/WEB-INF/login.jsp" />
</action>
</action-mappings>
<message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>
3、JSP页面
3.1 login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'login.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="/dispatch/loginandLogout.do?flag=userlogin" method="post">
u:<input type="text" name="username"><br/>
p:<input type="password" name="password"><br/>
<input type="submit" value="login">
</form>
</body>
</html>
3.2 ok.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'login.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<h1>登录成功</h1>
<a href="/dispatch/loginandLogout.do?flag=userloginout">退出系统</a>
</body>
</html>
4 LoginandLogoutAction
LoginandLogoutAction
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.yourcompany.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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 com.yourcompany.struts.form.UserForm;
/**
* MyEclipse Struts
* Creation date: 10-21-2017
*
* XDoclet definition:
* @struts.action validate="true"
*/
public class LoginandLogoutAction extends DispatchAction {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
//使用分派action往往需要自己重新命名函数，这个函数用于响应登录请求
public ActionForward userlogin(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
UserForm userForm=(UserForm) form;
if("123".equals(userForm.getPassword())){
return mapping.findForward("loginok");
}
else
{
return mapping.findForward("gologin");
}
}
//这个函数用于响应注销请求
public ActionForward userloginout(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
//把用户的session清空
request.getSession().invalidate();
return mapping.findForward("gologin");
}
}
5 UserForm
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.yourcompany.struts.form;
import org.apache.struts.action.ActionForm;
/**
* MyEclipse Struts
* Creation date: 10-21-2017
*
* XDoclet definition:
* @struts.form name="userForm"
*/
public class UserForm extends ActionForm {
private String username;
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;
}
private String password;
}