Save Web Page to a File in Java

Submitted by donbermoy on Monday, December 15, 2014 - 16:12.
This tutorial will teach you how to create a program that can save a web page into a file using Java. So, now let's start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of saveWebPage.java. 2. Import the following package library:
  1. import java.io.*; //used to access the FileOutputStream,InputStream,and OutputStream class
  2. import java.net.*; // used to access the URL class
  3.  
  4. import javax.swing.text.html.parser.DTD; //this library parses an html file to become a document
3. We will have a try and catch method. In the try method, we will initialize variables in our Main, u as the URL that has http://www.sourcecodester.com/tutorials/java/8858/drag-and-drop-icon-java.html, out for the OutputStream, and in for the InputStream.
  1.     try {
  2.        
  3.       URL u = new URL("http://www.sourcecodester.com/tutorials/java/8858/drag-and-drop-icon-java.html"); //source of the html file
  4.       OutputStream out = new FileOutputStream("source.html"); //filename of the html file after downloading
  5.       InputStream in = u.openStream(); //reading the html file
4. To parse the content of the HTML file, we will use the DTD class and named it as html variable.
  1.       DTD html = DTD.getDTD("html"); //parsing the document
  2.       System.out.println(html.getName()); //get the name of type of document
Close the InputStream and OutputStream.
  1.       in.close(); // close the InputStream
  2.       out.flush(); //flush the OutputStream
  3.       out.close(); //close the OutputStream
5. In the catch method, the source code below will trap the error.
  1.      catch (Exception e) {
  2.       System.err.println("Error reading web page");
  3.     }
Here's the full code of this tutorial:
  1. import java.io.*; //used to access the FileOutputStream,InputStream,and OutputStream class
  2. import java.net.*; // used to access the URL class
  3.  
  4. import javax.swing.text.html.parser.DTD; //this library parses an html file to become a document
  5.  
  6. public class saveWebPage{
  7.  
  8.   public static void main(String[] args) {
  9.  
  10.     try {
  11.        
  12.       URL u = new URL("http://www.sourcecodester.com/tutorials/java/8858/drag-and-drop-icon-java.html"); //source of the html file
  13.       OutputStream out = new FileOutputStream("source.html"); //filename of the html file after downloading
  14.       InputStream in = u.openStream(); //reading the html file
  15.       DTD html = DTD.getDTD("html"); //parsing the document
  16.       System.out.println(html.getName()); //get the name of type of document
  17.       in.close(); // close the InputStream
  18.       out.flush(); //flush the OutputStream
  19.       out.close(); //close the OutputStream
  20.     }
  21.      catch (Exception e) {
  22.       System.err.println("Error reading web page");
  23.     }
  24.  
  25.   }
  26.  
  27. }
For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below. Best Regards, Engr. Lyndon Bermoy IT Instructor/System Developer/Android Developer/Freelance Programmer Mobile: 09488225971 Landline: 826-9296 E-mail:[email protected] Add and Follow me on Facebook: https://www.facebook.com/donzzsky Visit and like my page on Facebook at: https://www.facebook.com/BermzISware
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Save Web Page to a File in Java
IO
Web Page
HTML
java

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