BAEL-2988 Move the code from spring-rest-simple to spring-mvc-simple-… (#7914)

* BAEL-2988 Move the code from spring-rest-simple to spring-mvc-simple-2, based on the review feedback.

* BAEL-2988 revert previous changes in the spring-rest-simple

spring-mvc-simple-2/src/main/java/com/baeldung/spring/config/MvcConfig.java

@@ -0,0 +1,22 @@
+package com.baeldung.spring.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.format.FormatterRegistry;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import com.baeldung.spring.config.converter.StringToEnumConverter;
+
+@Configuration
+@EnableWebMvc
+public class MvcConfig implements WebMvcConfigurer {
+
+    public MvcConfig() {
+        super();
+    }
+
+    @Override
+    public void addFormatters(FormatterRegistry registry) {
+        registry.addConverter(new StringToEnumConverter());
+    }
+}

spring-mvc-simple-2/src/main/java/com/baeldung/spring/config/converter/StringToEnumConverter.java

@@ -0,0 +1,20 @@
+package com.baeldung.spring.config.converter;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.spring.model.Modes;
+
+@Component
+public class StringToEnumConverter implements Converter<String, Modes> {
+    @Override
+    public Modes convert(String source) {
+        // Remove the try-catch block if we want to handle the exception globally in GlobalControllerExceptionHandler
+        try {
+            return Modes.valueOf(source.toUpperCase());
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+
+    }
+}

spring-mvc-simple-2/src/main/java/com/baeldung/spring/enums/EnumController.java

@@ -0,0 +1,24 @@
+package com.baeldung.spring.enums;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.spring.model.Modes;
+
+@RestController
+@RequestMapping("/enums")
+public class EnumController {
+
+    @GetMapping("/mode2str")
+    public String getStringToMode(@RequestParam("mode") Modes mode) {
+        return "good";
+    }
+
+    @GetMapping("/findbymode/{mode}")
+    public String findByEnum(@PathVariable Modes mode) {
+        return "good";
+    }
+}

spring-mvc-simple-2/src/main/java/com/baeldung/spring/exceptions/GlobalControllerExceptionHandler.java

@@ -0,0 +1,16 @@
+package com.baeldung.spring.exceptions;
+
+import org.springframework.core.convert.ConversionFailedException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+@ControllerAdvice
+public class GlobalControllerExceptionHandler {
+    @ExceptionHandler(ConversionFailedException.class)
+    public ResponseEntity<String> handleConflict(RuntimeException ex) {
+        // Remove the try-catch block in the StringToEnumConverter if we want to handle the exception here
+        return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);
+    }
+}

spring-mvc-simple-2/src/main/java/com/baeldung/spring/model/Modes.java

@@ -0,0 +1,5 @@
+package com.baeldung.spring.model;
+
+public enum Modes {
+    ALPHA, BETA;
+}