Java判断远程服务器上文件是否存在（跨服务器）

来源：互联网发布：安卓mac修改工具编辑：程序博客网时间：2024/05/19 21:44

　          //方法一：　　　　　  URL serverUrl = new URL("http://localhost:8090/Demo/clean.sql");            HttpURLConnection urlcon = (HttpURLConnection) serverUrl.openConnection();            String message = urlcon.getHeaderField(0);            if (StringUtils.hasText(message) && message.startsWith("HTTP/1.1 404")) {                System.out.println("不存在");            }else{                System.out.println("存在"+message);            }                        //方法二：            URL url = new URL("http://localhost:8090/Demo/clean.sql");            HttpURLConnection urlcon2 = (HttpURLConnection) url.openConnection();            Long TotalSize=Long.parseLong(urlcon2.getHeaderField("Content-Length"));              if (TotalSize>0){                System.out.println("存在");                            }else{                System.out.println("不存在");            }

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