finished

initial/src/main/java/hello/Application.java

@@ -0,0 +1,13 @@
+package hello;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+
+        SpringApplication.run(Application.class, args);
+    }
+}

initial/src/main/java/hello/Greeting.java

@@ -0,0 +1,21 @@
+package hello;
+
+public class Greeting{
+
+    private int id;
+    private String content;
+
+    public Greeting(int id, String content){
+        this.id = id;
+        this.content = content;
+    }
+
+    public String getContent() {
+        return content;
+    }
+    public int getId() {
+        return id;
+    }
+
+
+}

initial/src/main/java/hello/GreetingController.java

@@ -0,0 +1,15 @@
+package hello;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class GreetingController {
+
+    @RequestMapping(method = RequestMethod.GET, value = "/greeting")
+    public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name){
+        return new Greeting(1, "Hello " + name);
+    }
+}