java 在 Spring 中使用双值验证
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validation with double value in Spring
提问by Ducthien
I want to check score which have value: 0.00 <= value<= 10.00
I used:
-Model(Score):
我想检查有值的分数：0.00 <= value<= 10.00
我用过：
-Model(Score):
@Range(min = (long) 0.0, max = (long) 10.0)
private double score;
-messages.properties:
-messages.properties：
Range.score.score=Please input 0<= score <=10
-servlet-context.xml:
-servlet-context.xml：
<beans:bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<beans:property name="basename" value="messages" />
</beans:bean>
But the value = 10.01 has passed the check.
Please help me.
但 value = 10.01 已通过检查。
请帮我。
回答by Ducthien
I resolve my proplem with:
我解决了我的问题：
@DecimalMax("10.0") @DecimalMin("0.0")
private double score;
Thank you lots @ Kayaman ,@hyness
非常感谢@Kayaman，@hyness
回答by hyness
There are two problems. First problem is you are trying to specify a data type in the attribute of the annotation. You don't need to specify the data type or fraction either, this annotation only takes whole numbers.
有两个问题。第一个问题是您试图在注释的属性中指定数据类型。您也不需要指定数据类型或分数，此注释只需要整数。
Also, as specified by many others, doubles and floats are not allowed to rounding errors, so you need to use a BigDecimal instead of a double. BigDecimal has a doubleValue() method to get the value as a double.
此外，正如许多其他人所指定的，双精度数和浮点数不允许舍入错误，因此您需要使用 BigDecimal 而不是双精度数。BigDecimal 有一个 doubleValue() 方法来获取双精度值。
@Range(min = 0, max = 10)
private BigDecimal score;
