如何读取和下载一个网页？

解决方法

下面的示例显示了如何使用net.URL类的URL()建构函数阅读和下载网页。

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.gitbook.net");
      BufferedReader reader = new BufferedReader
      (new InputStreamReader(url.openStream()));
      BufferedWriter writer = new BufferedWriter
      (new FileWriter("data.htmll"));
      String line;
      while ((line = reader.readLine()) != null) {
         System.out.println(line);
         writer.write(line);
         writer.newLine();
      }
      reader.close();
      writer.close();
   }
}

结果

上面的代码示例将产生以下结果。

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