/** * 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")); } }
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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