Tomcat6设置gzip压缩 Java解压缩gzip

Tomcat6设置gzip压缩 Java解压缩gzip

 

          Tomcat的配置文件conf/server.xml添加如下的后四个属性即可设置将资源进行gzip压缩，有效提高响应速度：

 <Connector port="7087" protocol="HTTP/1.1"

               connectionTimeout="20000"

               redirectPort="8443"                 

               compression="on"

               compressionMinSize="2048"

               noCompressionUserAgents="gozilla,traviata"               compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain,image/gif,image/jpeg,image/png" />

利用http://gzip.zzbaike.com/ 测试，出现404 Not found错误好吧，自己测试搜的别人的代码：

import org.apache.commons.httpclient.HttpClient;

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

 

public class HttpTester {

 

   public static void main(String[] args) throws Exception{

        HttpClient http = new HttpClient();

        GetMethod get = new GetMethod("http://www.baidu.com/");

           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.getResponseContentLength());

                    String html = get.getResponseBodyAsString();

                    System.out.println(html);

                    System.out.println(html.getBytes().length);

               }

          }finally{

                  get.releaseConnection();

          }

      }

  }

要想编译运行这段代码，必须引入3个包：commons-httpclient-3.0.1.jar    commons-logging-1.1.1.jar     和   commons-codec-1.4.jar

并且String html = get.getResponseBodyAsString(); 最好替换为 InputStream is = get.getResponseBodyAsStream();然后再处理这个输入流(可以利用ByteArrayBuffer，但是需要引入httpcore-4.1.jar也可以不用，反正各种方法)

另一种测试方法，利用基本的J2SE，不用引入任何第三方包，也是搜的别人的：

public class Test2 {

 public static void main(String[] args) {

       try {

            URL url = new URL("http://www.baidu.com/");

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestProperty("Accept-Encoding", "gzip,deflate");//如果这里不设置，返回的就不是gzip的数据了，也就不用解压缩了

            conn.connect();

            InputStream in = conn.getInputStream();

            BufferedReader bin = new BufferedReader(new InputStreamReader(in,"GB2312"));

  

            //GZIPInputStream gzin = new GZIPInputStream(in);

         // BufferedReader bin = new BufferedReader(new InputStreamReader(gzin, "GB2312"));  

          String s = null;

          while((s=bin.readLine())!=null){

          System.out.println(s);

          }

            bin.close();

     } catch (Exception e) {

           e.printStackTrace();

    }

  }

}

解压缩就是上面注释掉的两行代码