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一、概述

项目不大的话，我们可以选择ftp+nginx的方式来实现文件服务器，如果文件需求量大的话，建议使用分布式文件服务器（如minio或者阿里云OSS等），它对横向扩展的支持比较好。

二、前置知识

三、代码示例

public static void  readFile(){
		int HttpResult; // 服务器返回的状态
	    try {
			String filePath = "http://192.168.1.25/File/file/20180913/netmethod.txt";
	    	URL url =new URL(filePath); // 创建URL
            URLConnection urlconn = url.openConnection(); // 试图连接并取得返回状态码
            urlconn.connect();
            HttpURLConnection httpconn =(HttpURLConnection)urlconn;
            HttpResult = httpconn.getResponseCode();
            if(HttpResult != HttpURLConnection.HTTP_OK) {//(HTTPResult为200的时候说明地址是访问到了)
                System.out.print("无法连接到");
            }else{
            	/*读取.txt文件*/
            	InputStream inputStream  = urlconn.getInputStream();
            	InputStreamReader reader = new InputStreamReader(inputStream,"utf-8");
            	BufferedReader br = new BufferedReader(reader);
            	StringBuilder builder = new StringBuilder();
            	String str = null;
            	while ((str = br.readLine())!=null) {
            		builder.append(str);
            		builder.append(System.getProperty("line.separator"));
				}
            	System.out.println(builder.toString());
            	/*读取Excel
            	 * int filesize = urlconn.getContentLength(); // 取数据长度
            	XSSFWorkbook xssfWorkbook = new XSSFWorkbook(urlconn.getInputStream());
            	int numberOfSheets = xssfWorkbook.getNumberOfSheets();
            	System.out.println(numberOfSheets);*/
            }
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	
}