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
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