Spring Boot & H2 - Environment Setup


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This chapter will guide you on how to prepare a development environment to start your work with Spring Framework. It will also teach you how to set up JDK, Tomcat and Eclipse on your machine before you set up Spring Framework −

Step 1 - Setup Java Development Kit (JDK)

Java SE is available for download for free. To download click here, please download a version compatible with your operating system.

Follow the instructions to download Java, and run the .exe to install Java on your machine. Once you have installed Java on your machine, you would need to set environment variables to point to correct installation directories.

Setting Up the Path for Windows 2000/XP

Assuming you have installed Java in c:\Program Files\java\jdk directory −

  • Right-click on 'My Computer' and select 'Properties'.

  • Click on the 'Environment variables' button under the 'Advanced' tab.

  • Now, edit the 'Path' variable and add the path to the Java executable directory at the end of it. For example, if the path is currently set to C:\Windows\System32, then edit it the following way

C:\Windows\System32;c:\Program Files\java\jdk\bin

Setting Up the Path for Windows 95/98/ME

Assuming you have installed Java in c:\Program Files\java\jdk directory −

  • Edit the 'C:\autoexec.bat' file and add the following line at the end −

SET PATH=%PATH%;C:\Program Files\java\jdk\bin

Setting Up the Path for Linux, UNIX, Solaris, FreeBSD

Environment variable PATH should be set to point to where the Java binaries have been installed. Refer to your shell documentation if you have trouble doing this.

For example, if you use bash as your shell, then you would add the following line at the end of your .bashrc

export PATH=/path/to/java:$PATH'

Alternatively, if you use an Integrated Development Environment (IDE) like Borland JBuilder, Eclipse, IntelliJ IDEA, or Sun ONE Studio, you will have to compile and run a simple program to confirm that the IDE knows where you have installed Java. Otherwise, you will have to carry out a proper setup as given in the document of the IDE.

Step 2 - Setup Eclipse IDE

All the examples in this tutorial have been written using Eclipse IDE. So we would suggest you should have the latest version of Eclipse installed on your machine.

To install Eclipse IDE, download the latest Eclipse binaries from www.eclipse.org/downloads. Once you download the installation, unpack the binary distribution into a convenient location. For example, in C:\eclipse on Windows, or /usr/local/eclipse on Linux/Unix and finally set PATH variable appropriately.

Eclipse can be started by executing the following commands on Windows machine, or you can simply double-click on eclipse.exe

%C:\eclipse\eclipse.exe 

Eclipse can be started by executing the following commands on Unix (Solaris, Linux, etc.) machine −

$/usr/local/eclipse/eclipse

Step 3 - Setup m2eclipse

M2Eclipse is eclipse plugin which is very useful integration for Apache Maven into the Eclipse IDE. We are using maven in this tutorial to build spring boot project and examples are run within eclipse using m2eclipse.

Install the latest M2Eclipse release by using the Install New Software dialog in Eclipse IDE, and point it to this p2 repository: https://download.eclipse.org/technology/m2e/releases/latest/

Step 4 - Setup Spring Boot Project

Now if everything is fine, then you can proceed to set up your Spring Boot. Following are the simple steps to download and install the Spring Boot Project on your machine.

  • Go to spring Initializr link to create a spring boot project, https://start.spring.io/.

  • Select project as Maven Project.

  • Select language as Java.

  • Select Spring Boot version as 2.5.3.

  • Set Project Metadata - Group as com.tutorialspoint, Artifact as springboot-h2, name as springboot-h2, Description as Demo project for Spring Boot and H2 Database and package name as com.tutorialspoint.springboot-h2.

  • Select packaging as Jar.

  • Select java as 11.

  • Add dependencies as Spring Web, Spring Data JPA, H2 Database and Spring Boot DevTools.

Now click on GENERATE Button to generate the project structure.

Spring Initializr

Once the maven based spring boot project is downloaded, then import the maven project into eclipse and rest eclipse will handle. It will download the maven dependencies and build the project to make it ready for further development.

Step 5 - POSTMAN for REST APIs Testing

POSTMAN is a useful tool to test REST Based APIs. To install POSTMAN, download the latest POSTMAN binaries from www.postman.com/downloads/. Once you download the installable, follow the instructions to install and use it.

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