一段下载的代码

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package cn.javase.util;

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

public class Download {
public static void download(String downloadPath, File toFile) {
  InputStream in = null;
  OutputStream out = null;
  try {
   URL url = new URL(downloadPath);
   URLConnection connection = url.openConnection();
   System.out.println(connection.getContentLength());
   in = connection.getInputStream();
   out = new FileOutputStream(toFile);
   byte[] bytes = new byte[8192];
   while (in.read(bytes) != -1) {
    out.write(bytes);
   }
   out.flush();
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   try {
    if (in != null) {
     in.close();
    }
    if (out != null) {
     out.close();
    }
   } catch (IOException e) {

}
}
}
}

package cn.javase.util;

import java.io.File;

public class Test {
public static void main(String[] args) {
String downPath = "http://localhost/JavaSE/upload/课程.png" ;
Download.download(downPath, new File("D:/")) ;
}

}

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