Java读取网络文件代码实例

本篇文章小编给大家分享一下Java读取网络文件代码实例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

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