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:

import java.io.*; //used to access the FileOutputStream,InputStream,and OutputStream class
import java.net.*; // used to access the URL class
 
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.

    try {
 
      URL u = new URL("http://www.sourcecodester.com/tutorials/java/8858/drag-and-drop-icon-java.html"); //source of the html file
      OutputStream out = new FileOutputStream("source.html"); //filename of the html file after downloading
      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.

      DTD html = DTD.getDTD("html"); //parsing the document
      System.out.println(html.getName()); //get the name of type of document

Close the InputStream and OutputStream.

      in.close(); // close the InputStream 
      out.flush(); //flush the OutputStream 
      out.close(); //close the OutputStream

5. In the catch method, the source code below will trap the error.

     catch (Exception e) {
      System.err.println("Error reading web page");
    }

Here's the full code of this tutorial:

import java.io.*; //used to access the FileOutputStream,InputStream,and OutputStream class
import java.net.*; // used to access the URL class
 
import javax.swing.text.html.parser.DTD; //this library parses an html file to become a document
 
public class saveWebPage{
 
  public static void main(String[] args) {
 
    try {
 
      URL u = new URL("http://www.sourcecodester.com/tutorials/java/8858/drag-and-drop-icon-java.html"); //source of the html file
      OutputStream out = new FileOutputStream("source.html"); //filename of the html file after downloading
      InputStream in = u.openStream(); //reading the html file
      DTD html = DTD.getDTD("html"); //parsing the document
      System.out.println(html.getName()); //get the name of type of document
      in.close(); // close the InputStream 
      out.flush(); //flush the OutputStream 
      out.close(); //close the OutputStream 
    }
     catch (Exception e) {
      System.err.println("Error reading web page");
    }
 
  }
 
}

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

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