exception : HandlerExceptionResolver

exception/src/main/java/hello/exception/WebConfig.java

@@ -2,14 +2,17 @@ package hello.exception;
 
 import hello.exception.filter.LogFilter;
 import hello.exception.interceptor.LogInterceptor;
+import hello.exception.resolver.MyHandlerExceptionResolver;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.HandlerExceptionResolver;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 import javax.servlet.DispatcherType;
 import javax.servlet.Filter;
+import java.util.List;
 
 @Configuration
 public class WebConfig implements WebMvcConfigurer {
@@ -22,6 +25,11 @@ public class WebConfig implements WebMvcConfigurer {
                 .excludePathPatterns("/css/**", "*.ico", "/error", "/error-page/**"); // 오류 페이지 경로 추가
     }
 
+    @Override
+    public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
+        resolvers.add(new MyHandlerExceptionResolver());
+    }
+
     @Bean
     public FilterRegistrationBean<Filter> logFilter() {
         FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<>();

exception/src/main/java/hello/exception/WebServerCustomizer.java

@@ -6,7 +6,7 @@ import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Component;
 
-@Component
+//@Component
 public class WebServerCustomizer implements WebServerFactoryCustomizer<ConfigurableWebServerFactory> {
     @Override
     public void customize(ConfigurableWebServerFactory factory) {

exception/src/main/java/hello/exception/api/ApiExceptionController.java

@@ -16,6 +16,8 @@ public class ApiExceptionController {
 
         if (id.equals("ex")) {
             throw new RuntimeException("잘못된 사용자");
+        } else if (id.equals("bad")) {
+            throw new IllegalArgumentException("잘못된 입력 값");
         }
 
         return new MemberDto(id, "hello " + id);

exception/src/main/java/hello/exception/resolver/MyHandlerExceptionResolver.java

@@ -0,0 +1,29 @@
+package hello.exception.resolver;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Slf4j
+public class MyHandlerExceptionResolver implements HandlerExceptionResolver {
+
+    @Override
+    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+
+        try {
+            if (ex instanceof IllegalArgumentException) {
+                log.info("IllegalArgumentException resolver to 400");
+                response.sendError(HttpServletResponse.SC_BAD_REQUEST, ex.getMessage());
+                return new ModelAndView();
+            }
+        } catch (IOException e) {
+            log.error("resolver ex ", e);
+        }
+
+        return null;
+    }
+}