java编写Http服务器下载工具

这个工具比较简单，用于配合另外一个工具进行文件传送,废话少说，上代码

import java.net.URL;
import java.net.URLConnection;
import java.io.File;
import java.io.InputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.commons.io.FileUtils;

public class HttpUtil{
 private String httppath = "";

public void setHttpPath(String httppath){
   this.httppath = httppath;
 }

public String getHttpPath(){
   return this.httppath;
 }

public HttpUtil(String httppath){
   this.httppath = httppath;
 }

public InputStream getStream(String url){
   InputStream inStream = null;
   try{
     URL httpurl = new URL(url);
     URLConnection conn = httpurl.openConnection();
     inStream = conn.getInputStream();
   }catch (Exception e){
     e.printStackTrace();
     return null;
   }
   return inStream;
 }

public int downLoad(String url,String localName ,int lines) throws FileNotFoundException, IOException{
   FileOutputStream fos = null;
   InputStream inStream = null;
   int ret = 0;
   try{
     URL httpurl = new URL(url);
     URLConnection conn = httpurl.openConnection();
     inStream = conn.getInputStream();
     fos = new FileOutputStream(localName);
     byte[] b = new byte[102400];
     int j = 0;
     while(inStream.read(b) != -1 && lines > 0){
       for(int i = j; i < b.length; i++){
         if(b[i] == '\n'){
           fos.write(b, j, i - j + 1);
           lines--;
           if(lines <= 0){
             break;
           }
           j = i + 1;
           continue;
         }
       }
     }
   }catch (Exception e){
     e.printStackTrace();
     ret = -1;
   }finally {
     fos.close();
     inStream.close();
     return ret;
   }
 }

public static void main(String[] args){
   String httppath = "";
   int lines = 0;
   String localName = "";
   try{
     httppath = args[0];
     localName = args[1];
     lines = Integer.parseInt(args[2]);
   }catch (Exception e){
     e.printStackTrace();
     return;
   }
   try{
     HttpUtil hu = new HttpUtil(httppath);
     hu.downLoad(hu.getHttpPath(),localName ,lines);
   }catch (Exception e){
     e.printStackTrace();
   }
 }
}

这个工具实现了从HTTP服务器上下载指定行数的文件，并且不会因为编码的问题引起下载的文件内容乱码
三个工具已经搞定，下一次就是把这三个工具结合起来将HTTP、FTP的文件转移到HDFS上

hadoop工具
ftp工具

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