使用python和java两种方式来完成下载网页，并保存成文件，

这里要注意的是保存成utf-8,无ＢＯＭ的格式，事实上我觉得生成BOM的效果会更好，更加清晰，不过要找实现这个的代码还是比较麻烦就没有弄了

package com.jd.cis;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.http.impl.io.ChunkedInputStream;

public class GzipFetchHtmlTest {
    public static void main(String[] args) throws IOException
    {
//        ChunkedInputStream  aa =new ChunkedInputStream ();
//            HttpURLConnection conn=new HttpURLConnection();
            URL url=new URL("http://www.baidu.com");
            HttpURLConnection conn=(HttpURLConnection)url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
//            conn.setChunkedStreamingMode(2);
            conn.connect();
            BufferedReader reader=new BufferedReader(new InputStreamReader(conn.getInputStream()));
            System.out.println("======================");
            String lines;
            reader.mark(999999);
            while((lines=reader.readLine())!=null)
            {
                System.out.println(lines);
            }
            reader.reset();
//            FileWriter fw=new FileWriter("c:/baidu_url_fetch.html");
//            BufferedWriter  bf=new BufferedWriter (fw);
            BufferedWriter bf = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("c:/baidu_url_fetch.html"), "UTF-8"));

            while((lines=reader.readLine())!=null)
            {
               
                bf.write(lines);
                reader.mark(30000);
                if(reader.readLine()!=null){
                    bf.newLine();
                   
                }
                reader.reset();
            }
            bf.flush();
            bf.close();
            reader.close();
            conn.disconnect();
    }

}

以下是python代码，

#!/usr/bin/env python
#encoding=utf-8
import sys
reload(sys)
sys.setdefaultencoding("utf-8")

#url="http://www.yuncheng.com/searchcate.aspx?page=4&cate=%E5%9B%BE%E4%B9%A6&subcate=%E5%8E%9F%E5%88%9B%E6%96%87%E5%AD%A6&level3=%E7%8E%84%E5%B9%BB&level4=%E4%B8%9C%E6%96%B9%E7%8E%84%E5%B9%BB#hd "
#url=url.strip()
#import urllib2
#for i in xrange(2,30):
#    print i
#    html=urllib2.urlopen(url).read()
#    f=open("c:/22/%s.txt"%i,"w")
#    f.write(html)
#    f.close()
import codecs
import urllib2,types
url="http://www.baidu.com"
#f=open("c:/baidu_fetch_by_py.html","w")
f=codecs.open("c:/baidu_fetch_by_py.html","w",encoding='UTF-8')
html=urllib2.urlopen(url).read()
if type(html)==types.UnicodeType:
    html=html.encode("utf-8")
    print "html covert"
else:
    html=html.decode("gbk","ignore").encode("utf-8","ignore")
    print "convert html"
f.write(html)
f.close()

两个生成的文件在md5sum下校验是一样的

最后生成的文件的字节数也是一样的，

都是使用了语言内置的函数，没有外部依赖