fix: 에러 발생시 json -> xml 형식으로 바뀌는 문제 해결

-> MappingJackson2XmlHttpMessageConverter 우선순위 조정 -> 가장 후순위로

mens-core/src/main/java/kr/xit/core/spring/config/WebMvcConfig.java

@@ -1,6 +1,8 @@
 package kr.xit.core.spring.config;
 
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import javax.servlet.DispatcherType;
@@ -22,6 +24,9 @@ import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.Ordered;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.xml.AbstractXmlHttpMessageConverter;
+import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
 import org.springframework.web.filter.CommonsRequestLoggingFilter;
 import org.springframework.web.method.support.HandlerMethodArgumentResolver;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
@@ -65,6 +70,16 @@ public class WebMvcConfig implements WebMvcConfigurer {
 
     private final CorsProperties corsProperties;
 
+    /**
+     * MappingJackson2XmlHttpMessageConverter 순서를 가장 후순위로 조정
+     * @param converters
+     */
+    @Override
+    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
+        // XML 관련 HttpMessageConverter 의 우선순위를 최하위로 낮추는 메소드
+        reorderXmlConvertersToEnd(converters);
+    }
+
     @Override
     public void addInterceptors(InterceptorRegistry registry) {
         registry.addInterceptor(new AuthentificationInterceptor())
@@ -167,6 +182,23 @@ public class WebMvcConfig implements WebMvcConfigurer {
         resolvers.add(new PageableArgumentResolver());
     }
 
+    /**
+     * MappingJackson2XmlHttpMessageConverter 를 가장 후순위로 조정하는 메소드
+     * @param converters
+     */
+    private void reorderXmlConvertersToEnd(List<HttpMessageConverter<?>> converters) {
+        List<HttpMessageConverter<?>> xml = new ArrayList<>();
+        for (Iterator<HttpMessageConverter<?>> iterator =
+            converters.iterator(); iterator.hasNext();) {
+            HttpMessageConverter<?> converter = iterator.next();
+            if ((converter instanceof AbstractXmlHttpMessageConverter)
+                || (converter instanceof MappingJackson2XmlHttpMessageConverter)) {
+                xml.add(converter);
+                iterator.remove();
+            }
+        }
+        converters.addAll(xml);
+    }
 
 //    /**
 //     * HandlerExceptionResolver 를 상속받은 resolver 등록