feat: HelloController 구현

api/src/main/kotlin/com/few/api/web/controller/hello/_HelloController.kt

@@ -0,0 +1,46 @@
+package com.few.api.web.controller.hello
+
+import com.few.api.web.controller.hello.request._HelloBody
+import com.few.api.web.controller.hello.request._HelloParam
+import com.few.api.web.support.ApiResponse
+import com.few.api.web.support.ApiResponseGenerator
+import com.few.api.web.support.MessageCode
+import org.springframework.http.HttpStatus
+import org.springframework.validation.annotation.Validated
+import org.springframework.web.bind.annotation.*
+
+@Validated
+@RestController
+@RequestMapping("/api/v1/hello")
+class _HelloController {
+
+    /**
+     * @param param 객체로 파라미터를 받는 경우
+     * @param club RequestParam을 사용하는 경우
+     */
+    @GetMapping
+    fun helloGet(
+        param: _HelloParam?,
+        @RequestParam(required = true) club: String
+    ): ApiResponse<ApiResponse.SuccessBody<Map<String, String>>> {
+        val name = param?.name ?: "few"
+        val age = param?.age ?: 0
+        val club = club
+        val data =
+            mapOf("hello" to "world", "name" to name, "age" to age.toString(), "club" to club)
+        return ApiResponseGenerator.success(data, HttpStatus.OK)
+    }
+
+    @PostMapping
+    fun helloPost(
+        @RequestBody body: _HelloBody
+    ): ApiResponse<ApiResponse.SuccessBody<Map<String, String>>> {
+        val data = mapOf("hello" to "world", "name" to body.name)
+        return ApiResponseGenerator.success(data, HttpStatus.OK, MessageCode.RESOURCE_CREATED)
+    }
+
+    @GetMapping("/error")
+    fun helloError(): ApiResponse<ApiResponse.Success> {
+        throw RuntimeException("Hello Error")
+    }
+}

api/src/main/kotlin/com/few/api/web/controller/hello/request/_HelloBody.kt

@@ -0,0 +1,5 @@
+package com.few.api.web.controller.hello.request
+
+data class _HelloBody(
+    val name: String
+)

api/src/main/kotlin/com/few/api/web/controller/hello/request/_HelloParam.kt

@@ -0,0 +1,6 @@
+package com.few.api.web.controller.hello.request
+
+data class _HelloParam(
+    val name: String?,
+    val age: Int?
+)