refactor: ObjectMapper 와 JsonView 통합

mvc/src/main/java/webmvc/org/springframework/web/servlet/view/JsonView.java

@@ -1,17 +1,29 @@
 package webmvc.org.springframework.web.servlet.view;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import java.util.Map;
 import web.org.springframework.http.MediaType;
 
 public class JsonView implements View {
 
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
     @Override
     public void render(final Map<String, ?> model, final HttpServletRequest request, HttpServletResponse response)
         throws Exception {
-        final String body = JsonWriterObjectMapper.writeJson(model);
+        final String body = writeJson(model);
         response.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
         response.getWriter().write(body);
     }
+
+    private String writeJson(final Map<String, ?> objects) {
+        try {
+            return objectMapper.writeValueAsString(objects);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("Json 객체 변환 과정에서 예외가 발생했습니다.");
+        }
+    }
 }