Java double URL Reader？

Question

有人能帮助我使用Java URL阅读器吗？

我已经用Java创建了一个URL阅读器，它读取链接并将其发送到特定的文件。如何从两个URL中读取代码并将其保存到特定文件中？

下面是我的代码：

import java.net.*;
import java.io.*;

public class URLReader {

public static void main(String[] args) throws Exception {

    URL oracle = new URL("http://www.oracle.com/");
    URLConnection yc = oracle.openConnection();
    BufferedReader in = new BufferedReader(new InputStreamReader(
    yc.getInputStream()));

    String inputLine;
    BufferedWriter psout = new BufferedWriter(new FileWriter("D:\\final.txt"));
    while ((inputLine = in.readLine()) != null) {
    psout.write(inputLine);
    System.out.println(inputLine);
    }
    in.close();
    psout.close();
   }
}

Answer 1

如果您计划写入单个文件，则可以将其提取到一个方法中，并在FileWriter中使用append参数

private static void saveURL(String urlString) throws MalformedURLException, IOException {
   URL url = new URL(urlString);
   URLConnection yc = url.openConnection();
   BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));

   String inputLine;
   BufferedWriter psout = new BufferedWriter(new FileWriter("final.txt", true));

   // write file...

}

Answer 2

如果我理解您的问题，您希望将来自两个不同URL的内容写入到同一个文件中。您可以拥有一个URL对象列表，然后对该列表进行读/写迭代。

List<URL> al = new ArrayList<>();
      URL oracle = new URL("http://www.oracle.com/");
      URL google =new  URL("http://www.google.com");
      al.add(oracle);
      al.add(google);
      BufferedReader in=null;
      BufferedWriter psout=null;
      for(URL url: al){
      URLConnection yc = url.openConnection();
      in = new BufferedReader(new InputStreamReader(
      yc.getInputStream()));
      String inputLine;
     psout = new BufferedWriter(new FileWriter("final.txt"));
      while ((inputLine = in.readLine()) != null) {
      psout.write(inputLine);
      System.out.println(inputLine);
      }

      }      in.close();
      psout.close();