添加了重量自定义注解

src/main/java/jty/expressdistributionsystem/DTO/GoodsDTO.java

@@ -4,6 +4,7 @@ import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
+import jty.expressdistributionsystem.validation.inter.ValidQuality;
 import lombok.Data;
 
 @Data
@@ -18,7 +19,8 @@ public class GoodsDTO {
     private String name;
 
     @NotBlank(message = "快递重量不能为空")
-    private String quality;
+    @ValidQuality
+    private Double quality;
 
     @NotBlank(message = "发货地不能为空")
     private String addressFrom;

src/main/java/jty/expressdistributionsystem/entity/Goods.java

@@ -7,6 +7,7 @@ import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
+import jty.expressdistributionsystem.validation.inter.ValidQuality;
 import lombok.Data;
 
 import java.io.Serial;
@@ -42,5 +43,6 @@ public class Goods implements Serializable {
 
     @TableField("quality")
     @NotBlank(message = "快递重量不能为空")
-    private String quality;
+    @ValidQuality
+    private Double quality;
 }

src/main/java/jty/expressdistributionsystem/validation/QualityValidator.java

@@ -0,0 +1,13 @@
+package jty.expressdistributionsystem.validation;
+
+import jakarta.validation.ConstraintValidator;
+import jakarta.validation.ConstraintValidatorContext;
+import jty.expressdistributionsystem.validation.inter.ValidQuality;
+
+public class QualityValidator implements ConstraintValidator<ValidQuality, Double> {
+
+    @Override
+    public boolean isValid(Double value, ConstraintValidatorContext context) {
+        return value != null && value > 0; // 确保数值不为null且大于0
+    }
+}

src/main/java/jty/expressdistributionsystem/validation/inter/ValidQuality.java

@@ -0,0 +1,21 @@
+package jty.expressdistributionsystem.validation.inter;
+
+import jakarta.validation.Constraint;
+import jakarta.validation.Payload;
+import jty.expressdistributionsystem.validation.QualityValidator;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Constraint(validatedBy = QualityValidator.class) // 指定验证器
+@Target({ ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE, ElementType.PARAMETER })
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValidQuality {
+    String message() default "快递重量必须大于0";
+
+    Class<?>[] groups() default {};
+
+    Class<? extends Payload>[] payload() default {};
+}