参数校验

src/main/java/com/greenorange/promotion/annotation/EnumValue.java

@@ -0,0 +1,19 @@
+package com.greenorange.promotion.annotation;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+// 自定义校验注解
+@Constraint(validatedBy = EnumValidator.class)
+@Target({ ElementType.FIELD, ElementType.PARAMETER, ElementType.METHOD })
+@Retention(RetentionPolicy.RUNTIME)
+public @interface EnumValue {
+    String message() default "无效的用户角色"; // 错误信息
+    Class<?>[] groups() default {}; // 组别
+    Class<? extends Payload>[] payload() default {}; // 负载
+    Class<? extends Enum<?>> enumClass(); // 枚举类类型
+}