Spring 的 PropertyPlaceHolderConfigurer 不会忽略无法解析的文件
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Spring's PropertyPlaceHolderConfigurer won't ignore unresolvable files
提问by kgautron
I am using spring's PropertyPlaceHolderConfigurer as follows :
我使用 spring 的 PropertyPlaceHolderConfigurer 如下：
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="locations">
<list>
<value>classpath:default.properties</value>
<value>file:${user.home}/webextractor.properties</value>
</list>
</property>
</bean>
Despite having set the ignoreUnresolvablePlaceholdersproperty to true, I still get a FileNotFoundExceptionon /home/kaykay/webextractor.properties. I know I could just create this file and leave it empty, but I'd like to know what is wrong here.
尽管已经设置的ignoreUnresolvablePlaceholders属性true，我仍然获得FileNotFoundException上/home/kaykay/webextractor.properties。我知道我可以创建这个文件并将其留空，但我想知道这里有什么问题。
回答by AxxA Osiris
The ignoreUnresolvablePlaceholdersset to true will ignore placeholders that are not set and not throw an exception.
For example if you have the following property in your class @Value("${person.age}")and no corresponding value set in your properties file.
该ignoreUnresolvablePlaceholders设置为true，将忽略未设置占位符，而不是抛出异常。例如，如果您的类中有以下属性，@Value("${person.age}")而您的属性文件中没有设置相应的值。
The ignoreResourceNotFoundproperty set to true will have the behavior you expected, that is ignore a resource that isn't found.
ignoreResourceNotFound设置为 true的属性将具有您预期的行为，即忽略未找到的资源。
Hope this helped.
希望这有帮助。
回答by Ashish
I have gone through your problem , I think Osiris is right about the property ignoreUnresolvablePlaceholders. But in case of your , you should to set the property ignoreResourceNotFoundtrue. So that , if the file is not existing then it will ignore that file.
我已经解决了你的问题，我认为 Osiris 对财产的看法是正确的ignoreUnresolvablePlaceholders。但是对于您的 ，您应该将属性设置为ignoreResourceNotFoundtrue。因此，如果该文件不存在，那么它将忽略该文件。
Modified code will be
修改后的代码将是
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="ignoreResourceNotFound" value="true" />
<property name="locations">
<list>
<value>classpath:default.properties</value>
<value>file:${user.home}/webextractor.properties</value>
</list>
</property>
</bean>
try this code and let me know.
试试这个代码，让我知道。
