struts2验证码

< %@ page  contentType ="text/html; charset=GBK"% > 
< html > 
   < head > 
     < title >test image code </title> 
< script  type ="text/javascript" > 
function reloadImg(){ 
var i = Math.random(); 
document.getElementById("imgCode").src="imgcode?"+i; 
} 
</script> 
   </head> 
   < body > 
     < form  action ="imageCodeCheck.action"  method ="POST"  name ="form1" > 
       < img  id ="imgCode"  src ="imgcode"  border ="0" > 
       < input  type ="text"  name ="thecode"  /> < a  href ="javascript:reloadImg();" >看不清？ </a> 
       < font  color ="red" >${requestScope.imgCodeError } </font> 
       < br > 
       < input  type ="submit"  name ="submit"  value =" 提 交 "  /> 
     </form> 
   </body> 
</html> 

package com.lichen.action; 

import java.util.Map; 

import javax.servlet.http.HttpServletRequest; 

import org.apache.struts2.interceptor.ServletRequestAware; 
import org.apache.struts2.interceptor.SessionAware; 

import cn.com.enorth.util.imgcode.ImageCodeUtils; 

import com.opensymphony.xwork2.ActionSupport; 

public  class ImageCodeCheck  extends ActionSupport  implements 
    ServletRequestAware, SessionAware { 

   private HttpServletRequest request; 
   private Map session; 

  @Override 
   public String execute()  throws Exception { 
     if (ImageCodeUtils.isGoodCode(request,  "thecode")) { 
       return SUCCESS; 
    }  else { 
      request.setAttribute( "imgCodeError",  "验证码输入不正确"); 
    } 
     return INPUT; 
  } 

  @Override 
   public  void setServletRequest(HttpServletRequest request) { 
     this.request = request; 
  } 

  @Override 
   public  void setSession(Map session) { 
     this.session = session; 
  } 
} 

<? 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 > 
   < constant  name ="struts.i18n.encoding"  value ="GBK" > </ constant > 
   < constant  name ="struts.locale"  value ="zh_CN" > </ constant > 
   < package  name ="struts2"  extends ="struts-default" > 
     < action  name ="imageCodeCheck"  class ="com.lichen.action.ImageCodeCheck"  > 
       < result  name ="success"  >index.jsp </ result > 
       < result  name ="input"  >test.jsp </ result > 
     </ action > 
   </ package > 
</ struts >

<? 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 --> 
   < filter > 
     < filter-name >struts2 </ filter-name > 
     < filter-class > 
      org.apache.struts2.dispatcher.FilterDispatcher 
     </ filter-class > 
   </ filter > 
   < filter-mapping > 
     < filter-name >struts2 </ filter-name > 
     < url-pattern >/* </ url-pattern > 
   </ filter-mapping > 
     
    <!--  spring --> 
   < context-param > 
     < param-name >contextConfigLocation </ param-name > 
     < param-value >classpath*:applicationContext-*.xml </ param-value > 
   </ context-param > 

   < listener > 
     < listener-class > 
      org.springframework.web.context.ContextLoaderListener 
     </ listener-class > 
   </ listener > 

  <!--  hibernate 的session 创建关闭 --> 
   < filter > 
     < filter-name >hibernateFilter </ filter-name > 
     < filter-class > 
      org.springframework.orm.hibernate3.support.OpenSessionInViewFilter 
     </ filter-class > 
   </ filter > 
   < filter-mapping > 
     < filter-name >hibernateFilter </ filter-name > 
     < url-pattern >/* </ url-pattern > 
   </ filter-mapping > 
     
    <!--  验证码 --> 
     < servlet > 
         < servlet-name >imagecodeservlet </ servlet-name > 
         < servlet-class >cn.com.enorth.util.imgcode.ImageCodeServlet </ servlet-class > 
         < init-param > 
             < param-name >type </ param-name > 
             < param-value >1 </ param-value > 
         </ init-param > 
         < init-param > 
             < param-name >length </ param-name > 
             < param-value >4 </ param-value > 
         </ init-param > 
     </ servlet > 
     < servlet-mapping > 
         < servlet-name >imagecodeservlet </ servlet-name > 
         < url-pattern >/imgcode </ url-pattern > 
     </ servlet-mapping > 
     
     < welcome-file-list > 
         < welcome-file >index.jsp </ welcome-file > 
     </ welcome-file-list > 
</ web-app >