添加自定义校验：ElementNotBlank

src/main/java/cn/meteor/beyondclouds/core/validation/constraints/ElementNotBlank.java

+package cn.meteor.beyondclouds.core.validation.constraints;
+
+import cn.meteor.beyondclouds.core.validation.validator.ElementNotBlankValidator;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.*;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+/**
+ * 被验证的参数集合的元素不能为空
+ * @author meteor
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE })
+@Documented
+@Constraint(validatedBy = ElementNotBlankValidator.class)
+public @interface ElementNotBlank {
+
+    String message() default "element cannot blank";
+
+    Class<?>[] groups() default { };
+
+    Class<? extends Payload>[] payload() default { };
+
+
+    @Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE })
+    @Retention(RUNTIME)
+    @Documented
+    @interface List {
+        ElementNotBlank[] value();
+    }
+}

src/main/java/cn/meteor/beyondclouds/core/validation/constraints/NullOrNotBlank.java

@@ -4,11 +4,12 @@ import cn.meteor.beyondclouds.core.validation.validator.NullOrNotBlankValidator;
 
 import javax.validation.Constraint;
 import javax.validation.Payload;
-import javax.validation.constraints.AssertTrue;
-import java.lang.annotation.*;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 import static java.lang.annotation.ElementType.*;
-import static java.lang.annotation.ElementType.TYPE_USE;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
 /**
@@ -33,6 +34,6 @@ public @interface NullOrNotBlank {
     @Retention(RUNTIME)
     @Documented
     @interface List {
-        AssertTrue[] value();
+        NullOrNotBlank[] value();
     }
 }

src/main/java/cn/meteor/beyondclouds/core/validation/validator/ElementNotBlankValidator.java

+package cn.meteor.beyondclouds.core.validation.validator;
+
+import cn.meteor.beyondclouds.core.validation.constraints.ElementNotBlank;
+import org.springframework.util.StringUtils;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+import java.util.Collection;
+
+/**
+ * ElementNotBlank参数校验器
+ * @author meteor
+ */
+public class ElementNotBlankValidator implements ConstraintValidator<ElementNotBlank, Collection<String>> {
+
+    @Override
+    public boolean isValid(Collection<String> value, ConstraintValidatorContext context) {
+        if (null == value) {
+            return true;
+        }
+        for (String str : value) {
+            if (StringUtils.isEmpty(str)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

src/main/java/cn/meteor/beyondclouds/modules/blog/form/BlogForm.java

 package cn.meteor.beyondclouds.modules.blog.form;
 
+import cn.meteor.beyondclouds.core.validation.constraints.ElementNotBlank;
 import cn.meteor.beyondclouds.core.validation.constraints.NullOrNotBlank;
 import cn.meteor.beyondclouds.core.validation.groups.InsertGroup;
 import cn.meteor.beyondclouds.core.validation.groups.UpdateGroup;
@@ -7,6 +8,7 @@ import lombok.Data;
 
 import javax.validation.constraints.NotEmpty;
 import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
 import java.util.List;
 
 /**
@@ -39,8 +41,12 @@ public class BlogForm {
     @NullOrNotBlank(message = "请传入有效的博客内容", groups = UpdateGroup.class)
     private String content;
 
+    @Size(min = 1, message = "请至少传一个topicId", groups = {InsertGroup.class, UpdateGroup.class})
+    @ElementNotBlank(message = "topicId内容不能为空", groups = {InsertGroup.class, UpdateGroup.class})
     private List<String> topicIds;
 
+    @Size(min = 1, message = "请至少传一个tagId", groups = {InsertGroup.class, UpdateGroup.class})
+    @ElementNotBlank(message = "tagId内容不能为空", groups = {InsertGroup.class, UpdateGroup.class})
     private List<String> tagIds;
 
     @NotNull(message = "浏览权限不能为空", groups = InsertGroup.class)