在Spring中指定包含值的列表的最简单方法是什么? [英] What is the easiest way to specify a list with values in Spring?
问题描述
假设我有一个很大的值列表aa bb cc dd ee ff gg等,我需要在春天作为构造函数传递
Assume I'm having a large list of values aa bb cc dd ee ff gg etc., which I need to pass as a constructor in spring
如果我需要配置为字符串数组,这在春天很容易,因为我们可以将值指定为逗号分隔为aa,bb,cc等。
If I need to configure as string array it is easy in spring as we can just specify the values as comma separated as aa, bb, cc etc.,
如果我需要配置作为列表,我需要做如下所示
If I need to configure as list I need to do like below
<bean name="myBean" class="MyClass">
<constructor-arg>
<list>
<value>aa</value>
<value>bb</value>
<value>cc</value>
<value>dd</value>
</list>
</constructor-arg>
</bean>
当值增加时,它占据了一个巨大的线条,看起来很难看。
When the number of values increased it occupies a huge lines and it looks ugly.
有人可以帮助我如何将大值作为构造函数传递给字符串中的列表吗?
Could some one please help me how we can pass large values as list in string as constructor?
推荐答案
传递给列表的值是否来自属性文件?
如果是这样,您可以使用以下内容:
Are the values being passed to the list comming from a properties file? If so, you can use the something like this:
<bean name="myBean" class="MyClass">
<constructor-arg>
<bean class="org.springframework.util.StringUtils" factory-method="commaDelimitedListToSet">
<constructor-arg type="java.lang.String" value="${list.value}"/>
</bean>
</constructor-arg>
</bean>
以下.properties文件
with the following .properties file
list.value=aa,bb,cc,dd
如果没有,你显然可以直接传递:
And if not, you can apparently just pass then directly :
<bean name="myBean" class="MyClass">
<constructor-arg>
<bean class="org.springframework.util.StringUtils" factory-method="commaDelimitedListToSet">
<constructor-arg type="java.lang.String" value="aa,bb,cc,dd"/>
</bean>
</constructor-arg>
</bean>
这篇关于在Spring中指定包含值的列表的最简单方法是什么?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!