在main函数中实现Servlet下载服务的客户端

场景:获取一个url从下载服务端下载文件到本地路径
1.本例服务端可以参考, 使用Servlet实现文件下载服务端
2.本例主要使用java.net.URL,java.net.URLConnection来实现网络连接下载

public class TestDownloadServlet {

	/**1.本地存储已经下载的文件目录 */
	private static final String localPath = "E:\\download\\";
	/**2.下载url */
	private static final String url = "http://127.0.0.1:8080/study/download?filename=8195B04F2E924C2E9596AC79488351EF.zip";
	/**3.需要下载的文件名*/
	private static final String fileName = "8195B04F2E924C2E9596AC79488351EF.zip";
	
	public static void main(String[] args) {
		System.out.println("测试开始.....");
		try {
			downloadLocal(url);
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.out.println("测试结束.....");
	}

	/** 4.建立请求连接并从网络流中读取数据*/
	public static void downloadLocal(String urls) throws IOException {
		
		String local = localPath + fileName;
		URL url = new URL(urls);
		URLConnection con = url.openConnection();
		FileOutputStream out = new FileOutputStream(local);
		InputStream ins = con.getInputStream();
		byte[] b = new byte[1024 * 8];
		int i = 0;
		while ((i = ins.read(b)) != -1) {
			out.write(b, 0, i);
		}
		ins.close();
		out.close();
	}
}

以上,TKS.