配gzip的过滤器进行压缩解决表单加载慢问题

一个客户的表单上字段超过五百，经浏览器的调试器发现主要问题是从服务器取数据花费了大量时间，下载内容大小约1.2M，下载时间在10s左右，导致样式加载完大约在17s左右（不清除浏览器缓存）。最终考虑利用gzip压缩来解决数据量大的问题。

web.xml配置过滤器：

 <filter>

    <filter-name>Compress</filter-name>

    <filter-class>weaver.filter.GZIPFilter</filter-class>

  </filter>

  <filter-mapping>

    <filter-name>Compress</filter-name>

    <url-pattern>*.js</url-pattern>

  </filter-mapping>

  <filter-mapping>

    <filter-name>Compress</filter-name>

    <url-pattern>*.css</url-pattern>

  </filter-mapping>

  <filter-mapping>

    <filter-name>Compress</filter-name>

    <url-pattern>*.jsp</url-pattern>

  </filter-mapping>

过滤器代码：

package weaver.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;

public class GZIPFilter

  implements Filter

{

  public void doFilter(ServletRequest paramServletRequest, ServletResponse paramServletResponse, FilterChain paramFilterChain)

    throws IOException, ServletException

  {

    if ((paramServletRequest instanceof HttpServletRequest)) {

      HttpServletRequest localHttpServletRequest = (HttpServletRequest)paramServletRequest;

      HttpServletResponse localHttpServletResponse = (HttpServletResponse)paramServletResponse;

      String str = localHttpServletRequest.getHeader("accept-encoding");

      if ((str != null) && (str.indexOf("gzip") != -1))

      {

        GZIPResponseWrapper localGZIPResponseWrapper = new GZIPResponseWrapper(localHttpServletResponse);

        paramFilterChain.doFilter(paramServletRequest, localGZIPResponseWrapper);

        localGZIPResponseWrapper.finishResponse();

        return;

      }

      paramFilterChain.doFilter(paramServletRequest, paramServletResponse);

    }

  }

  public void init(FilterConfig paramFilterConfig)

  {

  }

  public void destroy()

  {

  }

}

经测试，表单速度加载提升一倍，客户表示认可。

巴特西

配gzip的过滤器进行压缩解决表单加载慢问题

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