struts2验证码

验证码大多是jsp,servlet写的. 我拿来主义了, 再自己完善了一下(我一直努力想要站在巨人的肩膀)

 

首先是页面 test.jsp

<%@ 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> 

 

 

接下来是Action了 ImageCodeCheck.java

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; 

  } 

} 

 

 

struts的配置很普通 struts.xml

<?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>

 

 

然后就是web的配置了 web.xml

<?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> 

重点在验证码的配置

 

 

本文转自chainli 51CTO博客，原文链接：http://blog.51cto.com/lichen/157515，如需转载请自行联系原作者