Java有什么办法读取网络文件，代码是什么

Java读取网络文件

输入url地址读取txt文件

/**
 * Created by qqg on 2018/1/3.
 */
import java.io.BufferedReader;
    
import java.io.FileNotFoundException;
    
import java.io.IOException;
    
import java.io.InputStreamReader;
    
import java.net.HttpURLConnection;
    
import java.net.URL;
    
import java.net.URLConnection;

public class w{

    private static String openFile(String filePath) {
    
        int HttpResult;
     // 服务器返回的状态
        String ee = new String();

        try
        {
    
            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) {
    
                System.out.print("无法连接到");

            }
 else {
    
                int filesize = urlconn.getContentLength();
     // 取数据长度
                InputStreamReader isReader = new InputStreamReader(urlconn.getInputStream(),"UTF-8");
    
                BufferedReader reader = new BufferedReader(isReader);
    
                StringBuffer buffer = new StringBuffer();
    
                String line;
     // 用来保存每行读取的内容
                line = reader.readLine();
 // 读取第一行
                while (line != null) {
     // 如果 line 为空说明读完了
                    buffer.append(line);
     // 将读到的内容添加到 buffer 中
                    buffer.append(" ");
     // 添加换行符
                    line = reader.readLine();
 // 读取下一行
                }
    
                System.out.print(buffer.toString());
    
                ee = buffer.toString();

            }

        }

        catch (FileNotFoundException e) {
    
            e.printStackTrace();

        }

        catch (IOException e) {
    
            e.printStackTrace();

        }
    
        return  ee;

    }

    public static void main(String[] args){
        System.out.print(w.openFile("http://******/hrmsstatic/SensitiveWord.txt"));

    }

}

Java读取网络文件问题 protocol = http host = null

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

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