摘要：這個工具比較簡單，用于配合另外一個工具進行文件傳送廢話少說，上代碼這個工具實現了從服務器上下載指定行數的文件，并且不會因為編碼的問題引起下載的文件內容亂碼三個工具已經搞定，下一次就是把這三個工具結合起來將的文件轉移到上工具工具

這個工具比較簡單，用于配合另外一個工具進行文件傳送,廢話少說，上代碼

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] == "
"){
                        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();
        }
    }
}

這個工具實現了從HTTP服務器上下載指定行數的文件，并且不會因為編碼的問題引起下載的文件內容亂碼
三個工具已經搞定，下一次就是把這三個工具結合起來將HTTP、FTP的文件轉移到HDFS上

hadoop工具
ftp工具