JavaScript tags in HTML document throws a parsing error

HTML2PDF, PHP

PHP Fatal error: Uncaught Spipu\Html2Pdf\Exception\HtmlParsingException: The HTML tag provided is invalid in /vendor/spipu/html2pdf/src/Parsing/TagParser.php:44

Fixes: For HTML2PDF < 5.x (html2pdf.class.php)

/**
* tag : script
* mode : OPEN
*
* @param  array $param
* @return boolean
*/
protected function _tag_open_Script($param)
{
return $this-&gt;_tag_open_B($param, 'script');
}

/**
* tag : script
* mode : CLOSE
*
* @param  array $param
* @return boolean
*/
protected function _tag_close_script($param)
{
return $this-&gt;_tag_close_B($param);
}

Difference between Java Servlet and JSP

Java Development

Servlet is html in java whereas JSP is java in html. Servlets run faster compared to JSP. … JSP is a webpage scripting language that can generate dynamic content while Servlets are Java programs that are already compiled which also creates dynamic web content. In MVC, jsp acts as a view and servlet acts as a controller.

Servlet example: Hello.java

response.setContentType("text/html");
    PrintWriter writer = response.getWriter();
    
    writer.println("<html>");
    writer.println("<head>");
    writer.println("<title>This is my .java file to .class file. Sample Application Servlet Page</title>");
    writer.println("</head>");
    writer.println("<body bgcolor=white>");
    
    writer.println("<table border=\"0\">");
    writer.println("<tr>");
    writer.println("<td>");
    writer.println("<img src=\"images/tomcat.gif\">");
    writer.println("</td>");
    writer.println("<td>");
    writer.println("<h1>Sample Application Servlet</h1>");
    writer.println("This is the output of a servlet that is part of");
    writer.println("the Hello, World application.");
    writer.println("</td>");
    writer.println("</tr>");
    writer.println("</table>");

JSP example: hello.jsp

<table border="0">
<tr>
<td align=center>
<img src="images/tomcat.gif">
</td>
<td>
<h1><%= new String("Sample Application JSP Page") %></h1>
This is the output of a JSP page that is part of the Hello, World
application.
</td>
</tr>
</table>

Convert .class to .java

Java Development

cd to the folder that contains .class file, type the command below (without .class extension). The class will be de-compiled to java code 

C:\Path-to-Class-File\classes\mypackage&gt;javap -c Hello

You’ll see the code of .java file that look like this in the terminal.

Compiled from &quot;Hello.java&quot;
public final class mypackage.Hello extends javax.servlet.http.HttpServlet{
public mypackage.Hello();
  Code:
   0:   aload_0
   1:   invokespecial   #1; //Method javax/servlet/http/HttpServlet.&quot;&lt;init&gt;&quot;:()V

   4:   return

public void doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.Http
ServletResponse)   throws java.io.IOException, javax.servlet.ServletException;
...

How to write an Object to a file

Java Development

Java object can be written into a file for future reference. This process is called Serialization (translating data structures or object state into a format that can be store). In order to do that, we have to implement the Serializable interface, and use ObjectOutputStream to write object into a file.

FileOutputStream fout = new FileOutputStream("c:\\temp\\address.txt");
ObjectOutputStream oos = new ObjectOutputStream(fout);
oos.writeObject(address);

Adding JUnit and Hamcrest for Testing in Java

Java Development
package test.string;

import java.lang.String;
import static org.junit.Assert.assertThat;
import org.junit.Test;

public class StringFormatTestCase {
    @Test
    public void testNumberFormattingWithLeadingZeros() {
        final String formatted = String.format("%04d", 1);
        assertThat(formatted, equalTo("0001"));
    }

    @Test
    public void testDoubleFormattingWithTwoDecimalPoints() {
        final String formatted = String.format("%.2f", 12.324234d);
        assertThat(formatted, equalTo("12.32"));
    }
}

Errors

Error:(3, 33) java: package org.junit does not exist
Error:(3, 2) java: static import only from classes and interfaces
Error:(5, 25) java: package org.junit does not exist
Error:(6, 12) java: package org.junit does not exist
Error:(12, 10) java: cannot find symbol
    symbol:   class Before
    location: class edu.kit.ipd.swt1.StringFormatTestCase 
    Error:(17, 11) java: cannot find symbol
[...]

In order to fix it we had to Open Module Settings for that project and manually add jar Dependencies junit-4.12.jar and hamcrest-core-1.3.jar which are contained in the IntelliJ installation lib directory (C://Program Files/JetBrains/lib/xxx.