feat : rest api 바우처 전체조회

Author: eugene225

src/main/java/org/prgrms/kdtspringdemo/voucher/controller/VoucherRestController.java

@@ -0,0 +1,31 @@
+package org.prgrms.kdtspringdemo.voucher.controller;
+
+import org.prgrms.kdtspringdemo.voucher.domain.Voucher;
+import org.prgrms.kdtspringdemo.voucher.domain.dto.VoucherViewDto;
+import org.prgrms.kdtspringdemo.voucher.service.VoucherService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/v1/voucher")
+public class VoucherRestController {
+    private final VoucherService voucherService;
+
+    public VoucherRestController(VoucherService voucherService) {
+        this.voucherService = voucherService;
+    }
+
+    @GetMapping("/vouchers")
+    ResponseEntity<List<VoucherViewDto>> showAllVouchers() {
+        final List<VoucherViewDto> vouchers = voucherService.findAll().stream()
+                .map(VoucherViewDto::new).toList();
+        return new ResponseEntity<>(vouchers, HttpStatus.OK);
+
+    }
+
+}