java 通过url下载图片

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private static  String Download(String urlList) {
        URL url = null;
        String filepath="";
        try {
            url = new URL(urlList);
            DataInputStream dataInputStream = new DataInputStream(url.openStream());
            String newpaht =path+getCurrentDateTime();//+"\\"+urlList.substring(urlList.lastIndexOf("/")+1, urlList.length());//+".jpg";
            try{
				File file = new File(newpaht);
				if(!file.exists()){
					file.mkdirs();					
				}
			}catch(Exception ex){
				System.out.println(ex);
			}
            filepath=newpaht+"\\"+urlList.substring(urlList.lastIndexOf("/")+1, urlList.length())+".jpg";
            FileOutputStream fileOutputStream = new FileOutputStream(new File(filepath));
            ByteArrayOutputStream output = new ByteArrayOutputStream();
 
            byte[] buffer = new byte[1024];
            int length;
 
            while ((length = dataInputStream.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            fileOutputStream.write(output.toByteArray());
            dataInputStream.close();
            fileOutputStream.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
		return filepath;
    }

测试

  public static void main(String[] args) {
	        String url = "https://img.zcool.cn/community/01f9ea56e282836ac72531cbe0233b.jpg";
	        Download(url);
	    }

引用

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;