关于Tomcat GZip的疑问-优快云博客

本文探讨了在Tomcat服务器中如何正确配置GZIP压缩功能，特别是针对JSON响应的压缩问题。作者尝试了多种方法包括修改contentType及在web.xml中添加mime-mapping，但返回JSON对象时仍无法实现压缩。

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为了减少网络流量
采用Tomcat Gzip压缩格式

               compression="on" 
               compressionMinSize="2048" 
               noCompressionUserAgents="gozilla, traviata" 
               compressableMimeType="text/html,application/xhtml+xml,application/xml,text/xml,text/javascript,text/css,text/plain,application/x-javascript,application/javascript,text/xhtml,text/json,application/json,application/x-www-form-urlencoded,text/javaScript"

其他都可以了,可是唯独通过action 返回 json对象不支持此压缩.
返回json 是采用
this.getResponse().setContentType("text/javascript;charset=utf-8");
方式传回的.

还试过web.xml 加
<mime-mapping>
<extension>action</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
都不行(用的struts2,因此扩展名为action)

测试gzip 效果代码


import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;


/**
* HTTP客户端测试类
* @author liudong
*/
public class HttpTester {

/**
* @param args
*/
public static void main(String[] args) throws Exception{
	HttpClient http = new HttpClient
   GetMethod get = new GetMethod(url);

try{
    get.addRequestHeader("accept-encoding", "gzip,deflate");
    get.addRequestHeader("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Alexa Toolbar; Maxthon 2.0)");
    int er = http.executeMethod(get);
    if(er==200){
     //System.out.println(get.get);
     String html = get.getResponseBodyAsString();
     System.out.println(html.getBytes().length);
     System.out.println(html);
    }
   }finally{
    get.releaseConnection();
   }
}

}