Java の例 - Web スクレイピング

/*
 author by w3cschool.cc
 Main.java
 */import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileWriter;import java.io.InputStreamReader;import java.net.URL;public class Main {
   public static void main(String[] args) 
   throws Exception {
      URL url = new URL("http://www.w3cschool.cc");
      BufferedReader reader = new BufferedReader
      (new InputStreamReader(url.openStream()));
      BufferedWriter writer = new BufferedWriter
      (new FileWriter("data.html"));
      String line;
      while ((line = reader.readLine()) != null) {
         System.out.println(line);
         writer.write(line);
         writer.newLine();
      }
      reader.close();
      writer.close();
   }}