[JAVA] [Spring Boot] How to create a project (for beginners)
What to do this time
- Create a SpringBoot + Java8 + gradle project.
- After accessing localhost: 8080 in chrome, display "Hello World".
environment
--IntelliJ (free)
- Mac
- java8
Prototype a project with Spring Initializr
--Open the official page of Spring Initializr.
――Here, select the elements you need and create them.
--When you have made your selection, click the Generate button.
--A zip will be created in the location you specified, so unzip it.
Open project in IntelliJ
--Open the folder you just unzipped.
--Right-click on the build.gradle file and open it in IntelliJ.
Show Hello World
--Without any modification to the SampleApplication class created in the early stages Create a new Controller class in the same directory as the SampleApplication class.
HelloController.java
@RestController
public class HelloController {
@GetMapping("/")
public String index() {
return "hello world";
}
@PostMapping("/")
public String index2() {
return "Hello";
}
--When you access "localhost: 8080", the GET method is called and
The characters are displayed.
important point
--Thymeleaf is not required. --When you make a change to the code, you have to press "■ (Stop)". Since it will be started multiple times, let's erase it one by one and then run "▶". --When you want to create RestAPI, not "@Controller" Let's add "@RestController".
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