commit

batch-quartz/src/main/java/com/spring/common/validation/CronExpressionValidator.java

@@ -0,0 +1,32 @@
+package com.spring.common.validation;
+
+import java.text.ParseException;
+import java.util.Date;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+
+import org.quartz.CronExpression;
+
+public class CronExpressionValidator implements ConstraintValidator<ValidCronExpression, String> {
+
+    @Override
+    public boolean isValid(String cronExpression, ConstraintValidatorContext context) {
+        if (cronExpression == null || cronExpression.isEmpty()) {
+            return false;
+        }
+        boolean result = false;
+        if(CronExpression.isValidExpression(cronExpression)){
+            try {
+                CronExpression targetExpression = new CronExpression(cronExpression);
+                if (targetExpression.getNextValidTimeAfter(new Date(System.currentTimeMillis())) != null) {
+                    result = true;
+                }
+            } catch (ParseException e) {
+                result = false;
+            }
+        }
+        return result;
+    }
+
+}

batch-quartz/src/main/java/com/spring/common/validation/ValidCronExpression.java

@@ -0,0 +1,20 @@
+package com.spring.common.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Documented
+@Constraint(validatedBy = CronExpressionValidator.class)
+@Target({ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValidCronExpression {
+    String message() default "Invalid cron expression";
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}