Java GZip数据压缩传输到前台_java gzip返回前端-优快云博客

本文链接：https://blog.youkuaiyun.com/wangjian_an/article/details/51932039

本文介绍了一个名为GZipServlet的Java Servlet实例，该Servlet通过GZIP压缩算法将字符串数据进行压缩，并将其作为响应发送给客户端。文章展示了如何实现HTTP请求的GET及POST方法处理，重点在于使用GZIPOutputStream对数据进行压缩并设置适当的HTTP头部来告知浏览器接收的数据已被GZIP压缩。

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功能：利用sevrlet吧数据压缩在传输到前台

package cn.hncu.img;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.zip.GZIPOutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class GZipServlet extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doPost(request, response);
    }

    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to post.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //把字节数组str中的数据 压缩到  bos内存流当中

        String str="sssdadasdasdassssdadasdasda" +
                "ssssdadasdasdassssdadasdasdasss" +
                "sdadasdasdassssdadasdasdassssdadasdasdas";
        byte[] buf=str.getBytes();
        System.out.println("buf-length:"+buf.length);
        ByteArrayOutputStream bos=new ByteArrayOutputStream();
        GZIPOutputStream gout=new GZIPOutputStream(bos);
        gout.write(buf);
        gout.close();
        //从内存流array中把压缩后的数据拿出来
        byte dest[]=bos.toByteArray();
        System.out.println("des-length:"+dest.length);
        response.setHeader("Content-Encoding", "gzip");//告诉浏览器，当前发送的是gzip格式的内容
        response.setContentType("text/html");

        OutputStream out=response.getOutputStream();
        //out.write(src);
        out.write(dest);
        out.flush();
        out.close();

    }

}