WEBWORK:我写的webwork2中的cookie拦截器

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我写的webwork2中的cookie拦截器

作者:jscud

转载文章,转载自:
http://www.jscud.com/srun/news/viewhtml/4_2005_1/17.htm

webwork中没有cookie的映射,只有session的映射. 参考了moxie的cookie拦截器,自己写了一个拦截器. :P

拦截器代码如下:

package com.cnscud.util.interceptor;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.cnscud.util.WebCookies;
import com.opensymphony.webwork.ServletActionContext;
import com.opensymphony.xwork.ActionInvocation;
import com.opensymphony.xwork.interceptor.AroundInterceptor;
import com.opensymphony.xwork.util.OgnlValueStack;
/**
* Cookie拦截器,在Action里增加getWebCookies
*
* 参考moxie的cookie测试拦截器.
*
* @author scud 2004.10
*
*/
public class WebCookiesInterceptor extends AroundInterceptor
{
    protected void after(ActionInvocation arg0, String arg1) throws Exception
    {
    }
    protected void before(ActionInvocation arg0) throws Exception
    {
        HttpServletResponse response = ServletActionContext.getResponse();
        HttpServletRequest request = ServletActionContext.getRequest();

        Cookie[] cookies = request.getCookies();
        if (cookies != null && cookies.length > 0)
        {
            final OgnlValueStack stack = ServletActionContext.getContext().getValueStack();

            WebCookies aWCs = new WebCookies(request,response,cookies);
            stack.setValue(WebCookies.KEY_WEBCOOKIES,aWCs);
        }
    }
}

WebCookies的代码如下:

package com.cnscud.util;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.*;
/*
* WebCookies类
*
* 写一个cookie类来代替Cookie就不用依赖javax.servlet.http了 (TODO)
*
* @author scud 2004.10
*
*/
public class WebCookies
{
 /** ValueStack里面的键值 */
 public static final String KEY_WEBCOOKIES = "webCookies";
 private HttpServletRequest request;
 private HttpServletResponse response;
 private Cookie[] cookies;
 private Map cookieMap = new HashMap(20);
 /**
 * 构造函数
 *
 * @param request
 * @param response
 * @param cookies
 */
 public WebCookies(HttpServletRequest request, HttpServletResponse response,
 Cookie[] cookies)
 {
 this.request = request;
 this.response = response;
 setCookies(cookies);
 }
 /**
 * 设置Cookie数组
 *
 * @param cookies
 */
 public void setCookies(Cookie[] cookies)
 {
 cookieMap.clear();
 this.cookies = cookies;
 for (int i = 0; i < cookies.length; i++)
 {
 Cookie acookie = cookies[i];
 cookieMap.put(acookie.getName(), acookie);
 }
 }
 /**
 * 得到cookie数组
 *
 * @return cookie的数组
 */
 public Cookie[] getCookies()
 {
 return cookies;
 }
 /**
 * 得到某个cookie
 *
 * @param sKey 键名
 * @return 对应的cookie
 */
 public Cookie getCookie(String sKey)
 {
 if (null == cookieMap)
 {
 return null;
 }
 Object ac = cookieMap.get(sKey);
 if (null != ac)
 {
 return (Cookie) ac;
 }
 return null;
 }
 public Cookie get(String sKey)
 {
 return getCookie(sKey);
 }

 public Map getCookieMap()
 {
 return cookieMap;
 }
 /**
 * 添加一个cookie设置到HttpServletResponse中去
 *
 * @param aCookie
 */
 public void addCookie(Cookie aCookie)
 {
 //调用response的addCookie
 if (null != response)
 {
 response.addCookie(aCookie);
 }
 }
}

基础Action的代码如下: (其他action继承此Action即可)

package test;
import com.cnscud.util.WebCookies;
import com.opensymphony.xwork.ActionSupport;

public class CookieAction extends ActionSupport
{
    protected WebCookies webcookies;
    public void setWebCookies(WebCookies webcookies)
    {
        this.webcookies = webcookies;
    }


    public WebCookies getWebCookies()
    {
        return webcookies;
    }

}

Xwork的配置如下,可以根据自己的需求改动,我是所有action都截取cookie

<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" "http://www.opensymphony.com/xwork/xwork-1.0.dtd">
<xwork>
<include file="webwork-default.xml"/>

<package name="helloWorld" extends="webwork-default">

 <interceptors>
 <interceptor name="webCookiesInterceptor" class="com.cnscud.util.interceptor.WebCookiesInterceptor" />
 <interceptor-stack name="cookieStatck">
 <interceptor-ref name="webCookiesInterceptor"/>
 <interceptor-ref name="defaultStack"/>
 </interceptor-stack>
 </interceptors>
 <default-interceptor-ref name="cookieStatck" />
 <action name="startCookie" class="test.StartAction">
 <result name="success" type="dispatcher">
 <param name="location">/start.jsp</param>
 </result>
 </action>

 <action name="resultCookie" class="test.ResultAction">
 <result name="success" type="dispatcher">
 <param name="location">/result.jsp</param>
 </result>
 </action>
</package>



</xwork>

result的页面:

<%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib uri="webwork" prefix="ww" %>
<html>
<head>
 <title>My JSP 'result.jsp' result page</title>
</head>

<body>
cookie Hello:
<ww:property value="webCookies.cookieMap['Hello'].value" />
 
 Cookie Hello2:
<ww:property value="webCookies.cookieMap.Hello2.value" />
 
testValue:<ww:property value="testValue" />
 
</body>
</html>

ResultAction代码如下:

package test;

import javax.servlet.http.Cookie;

public class ResultAction extends CookieAction
{

    private String testValue;

    public String execute() throws Exception
    {
        //for test
        Cookie[] cs = webcookies.getCookies();



        return SUCCESS;
    }

    public void setTestValue(String testValue)
    {
        this.testValue = testValue;
    }

    public String getTestValue()
    {
        return testValue;
    }

}