initial spring rest example

.gitignore

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+# Eclipse
+.classpath
+.project
+.settings/
+
+# Intellij
+.idea/
+*.iml
+*.iws
+
+# Mac
+.DS_Store
+
+# Maven
+log/
+target/

pom.xml

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+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>javaintro.ws21.geoguesser</groupId>
+    <artifactId>javaintro-geoguesser</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <version>2.6.3</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <version>2.6.3</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>2.6.3</version>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/example/restservice/Greeting.java

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+package com.example.restservice;
+
+public class Greeting {
+    private final long id;
+    private final String content;
+
+    public Greeting(long id, String content) {
+        this.id = id;
+        this.content = content;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+}

src/main/java/com/example/restservice/GreetingController.java

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+package com.example.restservice;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+@RestController
+public class GreetingController {
+    private static final String template = "Hello, %s!";
+    private final AtomicLong counter = new AtomicLong();
+
+    @GetMapping("/greeting")
+
+    public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
+        return new Greeting(counter.incrementAndGet(), String.format(template, name));
+    }
+}

src/main/java/com/example/restservice/RestServiceApplication.java

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+package com.example.restservice;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class RestServiceApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(RestServiceApplication.class, args);
+	}
+}

src/main/resources/application.properties

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+