feat: 添加字段校验器

src/main/java/com/youlai/boot/core/annotation/ValidField.java

@@ -0,0 +1,28 @@
+package com.youlai.boot.core.annotation;
+
+
+import com.youlai.boot.core.validator.FieldValidator;
+import jakarta.validation.Constraint;
+import jakarta.validation.Payload;
+
+import java.lang.annotation.*;
+
+@Documented
+@Constraint(validatedBy = FieldValidator.class)
+@Target({ElementType.FIELD, ElementType.PARAMETER})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValidField {
+
+
+    String message() default "非法字段";
+
+    Class<?>[] groups() default {};
+
+    Class<? extends Payload>[] payload() default {};
+
+    /**
+     * 允许的字段值
+     */
+    String[] allowedValues();
+
+}

src/main/java/com/youlai/boot/core/validator/FieldValidator.java

@@ -0,0 +1,33 @@
+package com.youlai.boot.core.validator;
+
+import com.youlai.boot.core.annotation.ValidField;
+import jakarta.validation.ConstraintValidator;
+import jakarta.validation.ConstraintValidatorContext;
+
+import java.util.Arrays;
+
+/**
+ * 字段校验器
+ *
+ * @author Ray.Hao
+ * @since 2024/11/18
+ */
+public class FieldValidator implements ConstraintValidator<ValidField, String> {
+
+    private String[] allowedValues;
+
+    @Override
+    public void initialize(ValidField constraintAnnotation) {
+        // 初始化允许的值列表
+        this.allowedValues = constraintAnnotation.allowedValues();
+    }
+
+    @Override
+    public boolean isValid(String value, ConstraintValidatorContext context) {
+        if (value == null) {
+            return true; // 如果字段允许为空，可以返回 true
+        }
+        // 检查值是否在允许列表中
+        return Arrays.asList(allowedValues).contains(value);
+    }
+}