这是我现有的配置正常:
<bean id="foo"
class="foo.Foo">
<constructor-arg>
<list value-type="org.springframework.core.io.Resource">
<value>classpath:bar/01.lookup</value>
<value>classpath:bar/02.lookup</value>
<value>classpath:bar/03.lookup</value>
</list>
</constructor-arg>
</bean>
但是,我有数百个这样的.lookup文件,所以我在类Foo
中创建了一个构造函数,它需要一个文件夹的路径,我的天真方法是:
<bean id="foo"
class="foo.Foo">
<constructor-arg>
<bean class="org.springframework.core.io.FileSystemResource">
<constructor-arg>
<value>classpath:bar</value>
</constructor-arg>
</bean>
</constructor-arg>
</bean>
我希望调用listFiles
并遍历所有.lookup
文件,但这似乎不起作用,我得到一个NullPointerException,因为传递的路径没有被解析为目录。 / p>
答案 0 :(得分:2)
您需要使用PathMatchingResourcePatternResolver
,请参阅文档:
https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/io/support/PathMatchingResourcePatternResolver.html
代码示例:
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
Resource[] resources = resolver.getResources("classpath*:bar/*.lookup") ;
for (Resource resource: resources){
... process resource here ...
}