Java--URL编程

通过URL地址下载服务器上的文件

/**
 * URL编程测试
 * 通过URL地址下载服务器上的文件
 */
public class URLTest {

    public static void main(String[] args) {
        //服务器图片地址
        String imageUrl = "http://img33.igusoft.com/upl2oads/2021/fw253zpi41m.jpg";
        //获取URL对象
        URL url = null;
        HttpURLConnection connection = null;
        InputStream is = null;
        FileOutputStream fos = null;
        try {
            url = new URL(imageUrl);
            connection = (HttpURLConnection) url.openConnection();
            connection.connect();
            is = connection.getInputStream();
            fos = new FileOutputStream("美女图片.jpg");
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = is.read(buffer)) != -1) {
                fos.write(buffer, 0, len);
            }
            System.out.println("图片下载成功");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            //关闭流
            if (fos != null) {
                try {
                    fos.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (is != null) {
                try {
                    is.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (connection != null) {
                connection.disconnect();
            }
        }
    }
}