Java Spring：如何使用 @Value 注释注入内联字符串列表
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Spring: how to inject an inline list of strings using @Value annotation
提问by Brice Roncace
How do I inject a list of string values using the @Valueannotation. I'm using Spring 4.1.2.
如何使用@Value注释注入字符串值列表。我正在使用 Spring 4.1.2。
I've tried:
我试过了：
@Value(value = "top, person, organizationalPerson, user")
private List<String> userObjectClasses
and then based on the spring el documentation for inline lists:
然后基于内联列表的spring el 文档：
@Value(value = "{top, person, organizationalPerson, user}")
private List<String> userObjectClasses
These attempts only inject a string literal of the value given as the only element in the list.
这些尝试仅注入作为列表中唯一元素给出的值的字符串文字。
EDIT
编辑
In this case, I'd like to be able to simply hard-code the values rather than read from a property file. This approach seems a little less smelly than:
在这种情况下，我希望能够简单地对值进行硬编码，而不是从属性文件中读取。这种方法似乎比以下方法臭一点：
private List<String> userObjectClasses = Arrays.asList(new String[] {"top", "person", "organizationalPerson", "user"});
In the past, I've used spring's XML configuration to wire up beans, and in that case I could do (assuming the bean had a public setter for the userObjectClassesproperty):
过去，我使用 spring 的 XML 配置来连接 bean，在这种情况下我可以这样做（假设 bean 有一个公共的userObjectClasses属性设置器）：
<property value="userObjectClass">
<list>
<value>top</value>
<value>person</value>
<value>organizationalPerson</value>
<value>user</value>
</list>
</property>
Is there an analog to this when using annotation based configuration?
使用基于注释的配置时是否有类似的情况？
采纳答案by Yuri
list.of.strings=first,second,thirdtook from properties file for e.g.
list.of.strings=first,second,third从属性文件中获取例如
Then using SpEL:
然后使用SpEL：
@Value("#{'${list.of.strings}'.split(',')}")
private List<String> list;
EDIT
编辑
Then I don't think that you need to use annotation for such type of tasks. You could do all work just like you've menitioned or in the @PostConstructin order to initialize some fields.
那么我认为您不需要对此类任务使用注释。您可以像您提到的那样或在@PostConstruct中完成所有工作以初始化某些字段。
