diff --git a/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/parameters/ValidateParametersController.java b/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/parameters/ValidateParametersController.java
new file mode 100644
index 0000000..0fad8af
--- /dev/null
+++ b/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/parameters/ValidateParametersController.java
@@ -0,0 +1,39 @@
+package io.reflectoring.validation.controller.parameters;
+
+import javax.validation.ConstraintViolationException;
+import javax.validation.constraints.Min;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@Validated
+class ValidateParametersController {
+
+  @GetMapping("/validatePathVariable/{id}")
+  ResponseEntity<String> validatePathVariable(@PathVariable("id") @Min(5) int id) {
+    return ResponseEntity.ok("valid");
+  }
+
+  @GetMapping("/validateRequestParameter")
+  ResponseEntity<String> validateRequestParameter(@RequestParam("param") @Min(5) int param) {
+    return ResponseEntity.ok("valid");
+  }
+
+  @ExceptionHandler(ConstraintViolationException.class)
+  @ResponseStatus(HttpStatus.BAD_REQUEST)
+  @ResponseBody
+  String handleConstraintViolationException(ConstraintViolationException e) {
+    return "not valid due to validation error: " + e.getMessage();
+  }
+
+
+}
diff --git a/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/requestbody/ValidateRequestBodyController.java b/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/requestbody/ValidateRequestBodyController.java
new file mode 100644
index 0000000..78fc604
--- /dev/null
+++ b/spring-boot/validation/src/main/java/io/reflectoring/validation/controller/requestbody/ValidateRequestBodyController.java
@@ -0,0 +1,19 @@
+package io.reflectoring.validation.controller.requestbody;
+
+import javax.validation.Valid;
+
+import io.reflectoring.validation.Input;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+class ValidateRequestBodyController {
+
+  @PostMapping("/validateBody")
+  ResponseEntity<String> validateBody(@Valid @RequestBody Input input) {
+    return ResponseEntity.ok("valid");
+  }
+
+}