java中通过ip地址读取文件
public void testReadFile() { try { URL url = new URL("http://172.31.77.220:8080/data/files/F_000001/F_000001_10743.xlsx"); URLConnection openConnection = url.openConnection(); InputStream inputStream = openConnection.getInputStream(); } catch (Exception e) { e.printStackTrace(); } }
protocol = http host = null错误
上述代码写成 URL url = new URL("http:/172.31.77.220:8080/data/files/F_000001/F_000001_10743.xlsx");这样会报这个错误
应该是双斜杠才正确