Web server failed to start Port 8080 was already in use

In this post, We will try to understand the Web server failed to start Port 8080 was already in use error and how to fix it. Why Port 8080 was already in use? In the network, an IP address identifies each machine. Similarly, The network port identifies the application or process running on a machine. When an…

iText HTML to PDF in Java with Examples

Let’s learn how to convert HTML to pdf using java and itext pdf library. Itext PDF library lets you convert HTML to PDF documents. In this post, we will take a look at a simple example for HTML to PDF conversion. itext pdf dependencies To add support for itext-pdf dependencies, you need to add the…

Handling Date objects in Thymeleaf

In this post, We will see how to format and work with date objects in thymeleaf templates using the #dates utility with an example. Introduction Before getting in further, read a little about thymeleaf and how it can help build dynamic web applications. The #dates object in thymeleaf deals with date objects in thymeleaf model….

Derby Embedded Database for Spring Boot

In this post, We will see how we can use Apache Derby embedded database with Spring Boot applications with an example. Introduction Apache Derby is a pure java implementation of a relational database. Also, it complies to JDBC and RDBMS standards. For this reason, we can easily embed Derby into applications. Derby Dependencies for Spring…

Spring Boot Interview Questions 2021

Let’s go through some of the important spring Boot interview questions for beginners. We gathered these questions from some of the top MNCs across the globe. What is Spring Boot? Spring Boot is an opinionated view of the Spring ecosystem and third-party libraries to kickstart an application development with ease. Spring Boot makes this possible…

Comparators and equality in Thymeleaf

Even though we do not pay attention to these operations much, Comparators and equality operators are the key aspects in thymeleaf expressions. In this post, we will see how these operators can be used. Comparison Operators (Comparators) You can compare values and expressions using the >, <, >= and <= Comparators. These operators behave the same way as they would behave in most…

Thymeleaf Expressions in Spring Boot

Thymeleaf let us create dynamic views via extensive use of expressions in the template files. The simple form of expressions fall into four main categories. Variable expressions Variable expressions are the most commonly used ones in thymeleaf templates. These expressions help bind the data from the template context(model) into the resulting html(view). For example, The…

Thymeleaf Literals and Constants in Spring Boot

In this post, We will see how to use String literals,numeric and boolean constants in thymeleaf templates with an example in a spring boot application. Spring Boot can support any primitive data type to be a literal in an expression. To clarify, all number types, Char types, boolean type and ofcourse strings. Text literals in…

Thymeleaf Fragments in Spring Boot Application

Thymeleaf fragments let you break down your templates into reusable layout elements. For example, Several pages may have different content but still have the same header and footer. In these cases, Writing these into a separate template file and reusing it is not a bad idea. Fragments in Action Let’s take this snippet from a…

Thymeleaf Form POST Handling in Spring Boot

In this post, we will take a look how to handle form POST request submission from thymeleaf template in Spring boot and how to bind form elements to a Model object. Typical Form handling For applications that use Thymeleaf views, AJAX may be overkill. But form handling is not simple. At least in the context…