Sefa Demirtaş

Sefa Demirtaş

#springboot

Spring boot projesi nasıl oluşturulur?

Spring boot projesi nasıl oluşturulur?
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7 min read
#springboot

Bu yazımda temel spring boot projesi nasıl ayağa kaldırılır. Aşama aşama anlatmaya çalışacağım.

Yazımın daha anlaşılır olabilmesi maven , rest api ve java hakkında bilginizin olması avantaj sağlayacaktır. Eğer bu konularda kendinizi eksik hissediyorsanız. İlgili konuları gözden geçirebilirsiniz.

Spring Initializer

https://start.spring.io/ web sitesini üzerinden bir spring boot projesi başlata bilirsiniz.

  • Project kısmından Maven
  • Language kısmından Java
  • Spring Boot kısmından ise 3.2.2 kararlı sürümünü seçiyoruz.
  • Project Metadata
    • Group: com.example
    • Artifact: demo
    • Name: demo
    • Description: Demo project for Spring Boot
    • Package name: com.example.demo
    • Packaging Jar
    • Java: 17
  • **Dependencies:**Spring Web

Bir rest api uygulaması oluşturabilmeniz için spring-boot-starter-web dependency(bağımlılık) projenize dahil etmeniz gerekir

Image

pom.xml

Gerekli spring boot uygulama özellikleirnizi sağladıysanız pom.xml dosyanız şu şekilde görülecektir.

pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>3.2.2</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>17</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

Class Path Dependencies(Sınıf Yolu Bağımlılıkları)

spring-boot-starter-web

<dependencies>
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
   </dependency>
</dependencies>

Main Metod

  • @SpringBootApplication spring boot projesi olduğunu belirtir.
  • src/java/main dizinin de bulunur.
src/java/main
package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

}

Rest Basit Bir Uç Noktası

  • RestController bir class ın bir rest kontrolü olacağını ve dışarı uç olarak görev yapacağını belirtir.
  • RequestMapping istek URL nin nerden yapılabileceğini belirtir.
  • String Hello World isteği gönderen bir method
src/java/main
package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

	@RequestMapping(value="/")
	public String hello() {
		return "Hello Word";
	}
}

Jar Dosyası Haline Getirme

terminal
❯ mvn clean install
terminal
❯ mvn clean install
[INFO] Scanning for projects...
[INFO] 
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- clean:3.3.2:clean (default-clean) @ demo ---
[INFO] Deleting /Users/sefademirtas/Desktop/spring-demo/demo/target
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ demo ---
[INFO] Copying 1 resource from src/main/resources to target/classes
[INFO] Copying 0 resource from src/main/resources to target/classes
[INFO] 
[INFO] --- compiler:3.11.0:compile (default-compile) @ demo ---
[INFO] Changes detected - recompiling the module! :source
[INFO] Compiling 1 source file with javac [debug release 17] to target/classes
[INFO] 
[INFO] --- resources:3.3.1:testResources (default-testResources) @ demo ---
[INFO] skip non existing resourceDirectory /Users/sefademirtas/Desktop/spring-demo/demo/src/test/resources
[INFO] 
[INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ demo ---
[INFO] Changes detected - recompiling the module! :dependency
[INFO] Compiling 1 source file with javac [debug release 17] to target/test-classes
[INFO] 
[INFO] --- surefire:3.1.2:test (default-test) @ demo ---
[INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.example.demo.DemoApplicationTests
15:15:49.279 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils -- Could not detect default configuration classes for test class [com.example.demo.DemoApplicationTests]: DemoApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
15:15:49.323 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper -- Found @SpringBootConfiguration com.example.demo.DemoApplication for test class com.example.demo.DemoApplicationTests

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.2.2)

2024-02-15T15:15:49.483+03:00  INFO 55122 --- [           main] com.example.demo.DemoApplicationTests    : Starting DemoApplicationTests using Java 21 with PID 55122 (started by sefademirtas in /Users/sefademirtas/Desktop/spring-demo/demo)
2024-02-15T15:15:49.483+03:00  INFO 55122 --- [           main] com.example.demo.DemoApplicationTests    : No active profile set, falling back to 1 default profile: "default"
2024-02-15T15:15:49.962+03:00  INFO 55122 --- [           main] com.example.demo.DemoApplicationTests    : Started DemoApplicationTests in 0.579 seconds (process running for 1.056)
OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
WARNING: A Java agent has been loaded dynamically (/Users/sefademirtas/.m2/repository/net/bytebuddy/byte-buddy-agent/1.14.11/byte-buddy-agent-1.14.11.jar)
WARNING: If a serviceability tool is in use, please run with -XX:+EnableDynamicAgentLoading to hide this warning
WARNING: If a serviceability tool is not in use, please run with -Djdk.instrument.traceUsage for more information
WARNING: Dynamic loading of agents will be disallowed by default in a future release
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.247 s -- in com.example.demo.DemoApplicationTests
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] 
[INFO] --- jar:3.3.0:jar (default-jar) @ demo ---
[INFO] Building jar: /Users/sefademirtas/Desktop/spring-demo/demo/target/demo-0.0.1-SNAPSHOT.jar
[INFO] 
[INFO] --- spring-boot:3.2.2:repackage (repackage) @ demo ---
[INFO] Replacing main artifact /Users/sefademirtas/Desktop/spring-demo/demo/target/demo-0.0.1-SNAPSHOT.jar with repackaged archive, adding nested dependencies in BOOT-INF/.
[INFO] The original artifact has been renamed to /Users/sefademirtas/Desktop/spring-demo/demo/target/demo-0.0.1-SNAPSHOT.jar.original
[INFO] 
[INFO] --- install:3.1.1:install (default-install) @ demo ---
[INFO] Installing /Users/sefademirtas/Desktop/spring-demo/demo/pom.xml to /Users/sefademirtas/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.pom
[INFO] Installing /Users/sefademirtas/Desktop/spring-demo/demo/target/demo-0.0.1-SNAPSHOT.jar to /Users/sefademirtas/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.958 s
[INFO] Finished at: 2024-02-15T15:15:50+03:00
[INFO] ------------------------------------------------------------------------

Başarılı bir işlem olduğunu BUILD SUCCESS ifadesinden anlayabiliriz.

------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
  • Şimdi ise oluşturduğumuz jar dosyasını çalıştıralım

Oluşturduğumuz jar dosyası demo/target altında bulunur. demo-0.0.1-SNAPSHOT.jar

spring-demo/demo/target
~/Desktop/spring-demo/demo/target 

❯ ls -l
total 38504
drwxr-xr-x  4 sefademirtas  staff       128 Feb 15 15:15 classes
-rw-r--r--  1 sefademirtas  staff  19706166 Feb 15 15:15 demo-0.0.1-SNAPSHOT.jar
-rw-r--r--  1 sefademirtas  staff      2580 Feb 15 15:15 demo-0.0.1-SNAPSHOT.jar.original
drwxr-xr-x  3 sefademirtas  staff        96 Feb 15 15:15 generated-sources
drwxr-xr-x  3 sefademirtas  staff        96 Feb 15 15:15 generated-test-sources
drwxr-xr-x  3 sefademirtas  staff        96 Feb 15 15:15 maven-archiver
drwxr-xr-x  3 sefademirtas  staff        96 Feb 15 15:15 maven-status
drwxr-xr-x  4 sefademirtas  staff       128 Feb 15 15:15 surefire-reports
drwxr-xr-x  3 sefademirtas  staff        96 Feb 15 15:15 test-classes
  • Jar dosyasını çalıştırma
spring-demo/demo/target
~/Desktop/spring-demo/demo/target 

❯ java -jar demo-0.0.1-SNAPSHOT.jar
spring-demo/demo/target
~/Desktop/spring-demo/demo/target 

❯ java -jar demo-0.0.1-SNAPSHOT.jar

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.2.2)

2024-02-15T15:23:53.533+03:00  INFO 58538 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication v0.0.1-SNAPSHOT using Java 17.0.8 with PID 58538 (/Users/sefademirtas/Desktop/spring-demo/demo/target/demo-0.0.1-SNAPSHOT.jar started by sefademirtas in /Users/sefademirtas/Desktop/spring-demo/demo/target)
2024-02-15T15:23:53.535+03:00  INFO 58538 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to 1 default profile: "default"
2024-02-15T15:23:53.983+03:00  INFO 58538 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2024-02-15T15:23:53.989+03:00  INFO 58538 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2024-02-15T15:23:53.989+03:00  INFO 58538 --- [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.18]
2024-02-15T15:23:54.006+03:00  INFO 58538 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2024-02-15T15:23:54.007+03:00  INFO 58538 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 428 ms
2024-02-15T15:23:54.179+03:00  INFO 58538 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port 8080 (http) with context path ''
2024-02-15T15:23:54.186+03:00  INFO 58538 --- [           main] com.example.demo.DemoApplication         : Started DemoApplication in 0.842 seconds (process running for 1.064)
Image
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