java下载网络文件

import java.net.HttpURLConnection;
import java.net.URL;

private void readNetFile(String fileUrl) {
		// fileUrl为http或https链接
        InputStream inputStream = null;
        HttpURLConnection conn = null;
        URL url;
        try {
            url = new URL(fileUrl);
            conn = (HttpURLConnection) url.openConnection();
            // 设置超时间为5秒
            conn.setConnectTimeout(5 * 1000);
            // 得到输入流
            inputStream = conn.getInputStream();
            //生成本地文件之类的省略了
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
            try {
                if (inputStream != null) {
                    inputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }