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struts2入门Demo示例

程序员文章站 2023-01-29 11:10:51
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...

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;

struts2入门Demo示例

struts2入门Demo示例

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.

struts2入门Demo示例

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。