struts2编程的入门示例
本文讲述了struts2入门Demo示例。分享给大家供大家参考。具体如下：
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?
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.
希望本文所述对大家的Struts程序设计有所帮助。
本文地址：http://www.45fan.com/bcdm/23242.html