I am going to show yo how to download PDF file from MySQL database using Spring Boot and iText library in Java programming language. Many applications require dynamic generation of PDF documents for reporting purpose, such as, generating statements for customers, readers buying online specific chapters of a book, etc. In my another tutorial I…

Here I am going to show you how to download excel file from MySQL using Spring framework. Generating excel report from MySQL database has few advantages over other file formats. Most of the people you are working with in your organization are familiar with excel file format, hence it needs a short learning curve. You…

Introduction Here I am going to show you how to use docker compose for dockerizing Spring Boot Microservices MySQL app. Docker Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Then, with a single command, you create and start all the services…

Introduction Here I am going to explain how to trace Spring Boot Microservices logs with Spring Cloud Sleuth and Zipkin Server. Spring Cloud Sleuth provides Spring Boot auto-configuration for distributed tracing. One of the problems most developers face difficulty of tracing logs as your microservices applications grow and requests propagate from one microservice to another…

Introduction Here in this tutorial I am going to show you how to create a simple Spring Boot application. Then how to build, package and run this Spring Boot application with Docker in Linux environment (CentOS). I am going to use both gradle and maven as build tools for running build on this Spring Boot…

Here I will tell you how to include the required gradle project into another project. Situation may occur when you need to have dependency of another gradle project into your current gradle project, but neither of these projects is a multi-module project. So in this case you can easily add the required project into your…

Introduction Here in this tutorial I am going to show you how to upload multiple files using Spring Boot REST API. I had also shown you in my another example how to upload single file using Spring Boot REST API framework. For uploading file(s) you can use any client, for example, browser or any REST…

Introduction I am going to discuss here how to perform asynchronous request processing via Spring’s DeferredResult class. A DeferredResult can be used when the application wants to produce the return value from a thread of its own choice. A DeferredResult is what is possibly not-yet-finished computation that will be available in future. Spring MVC 3.2…

Introduction This tutorial walks you through the process of consuming the configurations from the Spring cloud config server. So I will setup a config server and build a client application consumes the configuration on startup and then refreshes the configuration without restarting the client. Let’s say you have some configuration values, in application properties or…

Introduction The tutorial, GraphQL Spring MySQL CRUD example will show you how to build CRUD (Create, Read, Update, Delete) operations using GraphQL with Spring Boot framework. We will use MySQL database server for storing data and Spring Data JPA to perform database activities. My previous tutorials on GraphQL explained about how to wrap REST APIs…

Introduction In this tutorial, I will show you how to delete multiple rows from HTML table as well as from database server at one go. You might have seen tutorial how to display data from server to client side and how to select multiple rows on HTML table. I will put checkbox against each row…

Introduction Here I will create an example on how to check/uncheck individual/all checkbox on HTML table rows. You might have seen how to display data from server using Angular and alternate row color using CSS. I will put checkbox against each row on the table so that user will be able to select a particular…