api sample

src/main/java/com/kamco/cd/kamcoback/common/api/HelloApiController.java

@@ -1,4 +1,25 @@
 package com.kamco.cd.kamcoback.common.api;
 
+import com.kamco.cd.kamcoback.common.api.HelloDto.Res;
+import com.kamco.cd.kamcoback.common.service.HelloService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequiredArgsConstructor
+@RestController
+@RequestMapping("/api/hello")
 public class HelloApiController {
+
+    private final HelloService helloService;
+
+    @GetMapping
+    public HelloDto.Res hello(HelloDto.Req req) {
+        req.valid();
+
+        Res res = helloService.sayHello(req);
+
+        return res;
+    }
 }

src/main/java/com/kamco/cd/kamcoback/common/api/HelloDto.java

@@ -1,9 +1,36 @@
 package com.kamco.cd.kamcoback.common.api;
 
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
 public class HelloDto {
 
-  public static class Req{
-    private String id;
-  }
+    @Getter
+    @Setter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class Req {
+        private String id;
 
+        public void valid() {
+            if (id == null) {
+                throw new IllegalArgumentException(id);
+            }
+        }
+    }
+
+    @Getter
+    public static class Res {
+        private String id;
+        private String name;
+
+        @Builder
+        public Res(String id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+    }
 }