下载服务器文件到本地

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
 
public class DownLoad {   

  public static void downloadFile(URL theURL, String filePath) throws IOException {  

     File dirFile = new File(filePath);
        if(!dirFile.exists()){//文件路径不存在时，自动创建目录
          dirFile.mkdir();
        }

      //从服务器上获取图片并保存
      URLConnection  connection = theURL.openConnection();
      InputStream in = connection.getInputStream();  
      FileOutputStream os = new FileOutputStream(filePath+"\123.png"); 

      byte[] buffer = new byte[4 * 1024];  
      int read;  
      while ((read = in.read(buffer)) > 0) {  
          os.write(buffer, 0, read);  
           }  
        os.close();  
        in.close();
      }   

      public static void main(String[] args) {   
        String urlPath = "http://1.1.9.59:8089/image/123.png";   
        String filePath = "d:\excel";   
        URL url = new URL(urlPath);   
          try {   
              downloadFile(url,filePath);   
           } catch (IOException e) {   
            e.printStackTrace();   
         }   
      }   
 
}