springboot_validation : @InitBinder

springboot_validation/src/main/java/hello/itemservice/ItemServiceApplication.java

@@ -1,13 +1,21 @@
 package hello.itemservice;
 
+import hello.itemservice.web.validation.ItemValidator;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.validation.Validator;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 @SpringBootApplication
-public class ItemServiceApplication {
+public class ItemServiceApplication { // implements WebMvcConfigurer
 
 	public static void main(String[] args) {
 		SpringApplication.run(ItemServiceApplication.class, args);
 	}
 
+	// global 설정
+//	@Override
+//	public Validator getValidator() {
+//		return new ItemValidator();
+//	}
 }

springboot_validation/src/main/java/hello/itemservice/web/validation/ValidationItemControllerV2.java

@@ -10,6 +10,8 @@ import org.springframework.validation.BindingResult;
 import org.springframework.validation.FieldError;
 import org.springframework.validation.ObjectError;
 import org.springframework.validation.ValidationUtils;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.servlet.mvc.support.RedirectAttributes;
 
@@ -25,6 +27,11 @@ public class ValidationItemControllerV2 {
     private final ItemRepository itemRepository;
     private final ItemValidator itemValidator;
 
+    @InitBinder
+    public void init(WebDataBinder dataBinder) {
+        dataBinder.addValidators(itemValidator);
+    }
+
     @GetMapping
     public String items(Model model) {
         List<Item> items = itemRepository.findAll();
@@ -179,7 +186,7 @@ public class ValidationItemControllerV2 {
         return "redirect:/validation/v2/items/{itemId}";
     }
 
-    @PostMapping("/add")
+//    @PostMapping("/add")
     public String addItemV5(@ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) {
 
         itemValidator.validate(item, bindingResult);
@@ -196,6 +203,21 @@ public class ValidationItemControllerV2 {
         return "redirect:/validation/v2/items/{itemId}";
     }
 
+    @PostMapping("/add")
+    public String addItemV6(@Validated @ModelAttribute Item item, BindingResult bindingResult, RedirectAttributes redirectAttributes, Model model) {
+
+        // 검증 실패시
+        if (bindingResult.hasErrors()) {
+            return "validation/v2/addForm";
+        }
+
+        // 검증 성공시
+        Item savedItem = itemRepository.save(item);
+        redirectAttributes.addAttribute("itemId", savedItem.getId());
+        redirectAttributes.addAttribute("status", true);
+        return "redirect:/validation/v2/items/{itemId}";
+    }
+
 
     @GetMapping("/{itemId}/edit")
     public String editForm(@PathVariable Long itemId, Model model) {