struts2Demo

1.新建Web Project, 名称:struts2Demo;

2.建立一个用户库struts2, 包含最少的struts2的最少的6个jar文件;

其实呢, 对于MyEclipse8以上来说, 是不必须的, 因为它直接支持struts2了.不需要另外导包.

3.用Build Path将struts2的库加进来;

4.在web.xml中加入以下配置:

[?xml version="1.0" encoding="UTF-8"?>
[web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" >

[!-- struts2的配置 -->
[filter>
[filter-name>struts2[/filter-name>
[filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter[/filter-class>
[/filter>
[filter-mapping>
[filter-name>struts2[/filter-name>
[url-pattern>/*[/url-pattern>
[/filter-mapping>

[welcome-file-list>
[welcome-file>index.jsp[/welcome-file>
[/welcome-file-list>
[/web-app>

5.建立Action,

package com.yenange.action;
import com.opensymphony.xwork2.Action;
public class LoginAction implements Action {
private String uname; //表单中的姓名
private String upass; //表单中的密码
//执行方法
@Override
public String execute() throws Exception {
System.out.println("姓名:"+uname);
System.out.println("密码:"+upass);
if (uname.equals("leaf") && upass.equals("leaf")) {
return "success";
}
return "error";
}
//记住, 要有get和set方法
public String getUpass() {
return upass;
}
public void setUpass(String upass) {
this.upass = upass;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
}

6.三个页面文件:

//index.jsp
[%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
[html>
[head>
[title>My JSP 'index.jsp' starting page[/title>
[/head>
[body>
[form action="login">
用户名:[input type="text" name="uname">[br>
密码:[input type="text" name="upass">[br>
[input type="submit" value="登陆" />
[/form>
[/body>
[/html>
//welcome.jsp
[%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
[html>
[head>
[title>My JSP 'welcome.jsp' starting page[/title>
[/head>
[body>
welcome struts2

[/body>
[/html>
//fail.jsp;
[%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
[html>
[head>
[title>My JSP 'welcome.jsp' starting page[/title>
[/head>
[body>
出错!

[/body>
[/html>

7.配置struts.xml. (对于MyEclipse6来说, 只能从别的地方copy)

[?xml version="1.0" encoding="UTF-8" ?>
[!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd" >
[struts>
[package name="default" namespace="/" extends="struts-default">
[action name="login" class="com.yenange.action.LoginAction">
[result name="success">/welcome.jsp[/result>
[result name="error">/fail.jsp[/result>
[/action>
[/package>
[!-- Add packages here -->
[/struts>

8.到此完成.可以运行一下了, 是不是很简单?

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http://sl514.blog.163.com/blog/static/66327412008121365039/

下面是取得request, session, application这些东西的方法.

package com.yenange.action;
import java.util.Map;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.SessionAware;
import org.apache.struts2.util.ServletContextAware;
import com.opensymphony.xwork2.Action;

public class LoginAction implements Action,ServletRequestAware,SessionAware,ServletContextAware {
private String uname; //表单中的姓名
private String upass; //表单中的密码
HttpServletRequest request; //常用的request
Map session; //常用的session,有不同, 但是不需要管
ServletContext application; //常用的application
//第二种取的方法;
HttpServletRequest request2 = ServletActionContext.getRequest();
HttpServletResponse response2 = ServletActionContext.getResponse();
HttpSession session2 = request2.getSession();

@Override
public void setServletRequest(HttpServletRequest req) {
this.request=req;
}
@Override
public void setSession(Map session) {
this.session=session;
}
@Override
public void setServletContext(ServletContext application) {
this.application=application;
}
//执行方法
public String execute() throws Exception {
if (uname.equals("leaf") && upass.equals("leaf")) {
request.setAttribute("userName", uname);
return "success";
}
request.setAttribute("accessError", uname+"这个用户或密码不正确!");
return "error";
}
//记住, 要有get和set方法
public String getUpass() {
return upass;
}
public void setUpass(String upass) {
this.upass = upass;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
}

//这些只是初步了, 后面再学习一些关于标签, 动态方法之类的东西.