去除url中自带的jsessionid

最新推荐文章于 2025-06-29 20:07:33 发布

aishuxi9261

最新推荐文章于 2025-06-29 20:07:33 发布

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文章标签： java web.xml

原文链接：http://www.cnblogs.com/xuzhenmin/p/3761104.html

本文介绍了一种在web应用中通过自定义过滤器RemoveUrlSessionFilter去除URL中jsessionid的方法，该过滤器实现了Servlet的Filter接口，通过判断是否从URL中获取sessionID来决定是否清除session。

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web.xml中配置Filter：

<filter>
   <filter-name>jsessionid</filter-name>
   <filter-class>
    cn.iautos.mall.filter.RemoveUrlSessionFilter
   </filter-class>
</filter>
<filter-mapping>
   <filter-name>jsessionid</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>

java代码如下：

package cn.iautos.mall.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import javax.servlet.http.HttpSession;

/**
 * 去除url中的jsessionid
 * @author xuzhenmin
 * @version 2014-5-30  下午2:33:34
 */
public class RemoveUrlSessionFilter implements Filter {

   
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // skip non-http requests
        if (!(request instanceof HttpServletRequest)) {
             chain.doFilter(request, response);
            return;
         }

         HttpServletRequest httpRequest = (HttpServletRequest) request;
         HttpServletResponse httpResponse = (HttpServletResponse) response;

        // clear session if session id in URL
        if (httpRequest.isRequestedSessionIdFromURL()) {
             HttpSession session = httpRequest.getSession();
            if (session != null) session.invalidate();
         }

        // wrap response to remove URL encoding
         HttpServletResponseWrapper wrappedResponse = new HttpServletResponseWrapper(httpResponse) {
             @Override
            public String encodeRedirectUrl(String url) {
                return url;
             }

         
            public String encodeRedirectURL(String url) {
                return url;
             }

           
            public String encodeUrl(String url) {
                return url;
             }

           
            public String encodeURL(String url) {
                return url;
             }
         };

        // process next request in chain
         chain.doFilter(request, wrappedResponse);
     }

    /**
      * Unused.
     */
    public void init(FilterConfig config) throws ServletException {
     }

    /**
      * Unused.
     */
    public void destroy() {
     }
}

转载于:https://www.cnblogs.com/xuzhenmin/p/3761104.html