Java writes the Http server download tool

This tool is relatively simple, used to cooperate with another tool for file transfer, nonsense, on the code

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();
    }
  }
}

This tool enables you to download a file with a specified number of lines from the HTTP server without causing the contents of the downloaded file to be garbled due to coding problems
The three tools are done, and the next step is to combine the three tools to transfer HTTP and FTP files to HDFS

(link: #)

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