本文講述了struts2入門Demo示例。分享給大家供大家參考。具體如下：
1.新建Web Project, 名稱:struts2Demo;
2.建立一個用戶庫struts2, 包含最少的struts2的最少的6個jar文件;
其實呢, 對于MyEclipse8以上來說, 是不必須的, 因為它直接支持struts2了.不需要另外導包.
3.用Build Path將struts2的庫加進來;
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; //表單中的姓名 private String upass; //表單中的密碼 //執行方法 @Override public String execute() throws Exception { System.out.println("姓名:"+uname); System.out.println("密碼:"+upass); if (uname.equals("leaf") && upass.equals("leaf")) { return "success"; } return "error"; } //記住, 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; } }6.三個頁面文件:
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"> 用戶名:<input type="text" name="uname"><br> 密 碼:<input type="text" name="upass"><br> <input type="submit" value="登陸" /> </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> 出錯!</body> </html>
7.配置struts.xml. (對于MyEclipse6來說, 只能從別的地方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.可以運行一下了, 是不是很簡單?
下面是取得request, session, application這些東西的方法.
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; //表單中的姓名 private String upass; //表單中的密碼 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 //第二種取的方法; 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; } //執行方法 public String execute() throws Exception { if (uname.equals("leaf") && upass.equals("leaf")) { request.setAttribute("userName", uname); return "success"; } request.setAttribute("accessError", uname+"這個用戶或密碼不正確!"); return "error"; } //記住, 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; } }這些只是初步了, 后面再學習一些關于標簽, 動態方法之類的東西.
希望本文所述對大家的Struts程序設計有所幫助。
新聞熱點
疑難解答
