java写的Http服务器下载工具

摘要：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，上代码这个工具实现了从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的文件转移到上工具工具

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

</>复制代码 
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] == "
"){
                        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