压缩extjs

1.使用gzip.exe打包压缩后的JS文件，最后生成xx.js.gz，把xx.js.gz文件改成xx.gzjs。

   压缩实例： ext3.2.0 ext-all.js （662KB）, gzip.exe压缩后为ext-all.gzjs（181KB）。 
   gzip使用方法:gzip.exe拷贝到 ext-all.js 同一目录

   在命令行下输入： gzip -9 ext-all.js ext-all.js.gz  修改ext-all.js.gz的后缀名ext-all.gzjs

2.web.xml中加入过滤器

<filter> 
      <filter-name>GzipJsFilter</filter-name> 
      <filter-class>net.kangsoft.util.GzipJsFilter</filter-class> 
      <init-param> 
          <param-name>headers</param-name> 
          <param-value>Content-Encoding=gzip</param-value> 
      </init-param> 
</filter> 
<filter-mapping> 
   <filter-name>GzipJsFilter</filter-name> 
   <url-pattern>*.gzjs</url-pattern> 
</filter-mapping> 

 3.加入过滤类

package com.tfyy.yx.util;

import java.io.IOException; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.Map; 
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 GzipJsFilter 
implements Filter 
{ 
@SuppressWarnings("unchecked")
Map headers = new HashMap(); 

public void destroy() { } 

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) 

throws IOException, ServletException { 
    if (req instanceof HttpServletRequest) 
      doFilter((HttpServletRequest)req, (HttpServletResponse)res, chain); 
    else 
      chain.doFilter(req, res); 
} 

@SuppressWarnings("unchecked")
public void doFilter(HttpServletRequest request, HttpServletResponse response, 

FilterChain chain) 
    throws IOException, ServletException 
{ 
    request.setCharacterEncoding("UTF-8"); 
    for (Iterator it = this.headers.entrySet().iterator(); it.hasNext(); ) { 
      Map.Entry entry = (Map.Entry)it.next(); 
      response.addHeader((String)entry.getKey(), (String)entry.getValue()); 
    } 
    chain.doFilter(request, response); 
} 

@SuppressWarnings("unchecked")
public void init(FilterConfig config) throws ServletException { 
    String headersStr = config.getInitParameter("headers"); 
    String[] headers = headersStr.split(","); 
    for (int i = 0; i < headers.length; ++i) { 
      String[] temp = headers[i].split("="); 
      this.headers.put(temp[0].trim(), temp[1].trim()); 
    } 
} 
}

 

4.在需导入js的页面head里面添加导入文件，

如：<script type="text/javascript" src="js/ext3/ext-all.gzjs"></script>

评论

2 楼 silvernet 2010-09-23  

需要IIS开启gzip压缩吧

1 楼 379548695 2010-08-13  

这个很有用顶了。以前直接在tomcat里面配置的。最近换到6.0之后配置了好像不起作用。楼主这个刚才我测试了。180kb