org.apache.commons.collections.map.MultiValueMap .
To download the JAR file containing org.apache.commons.collections.map.MultiValueMap , you must download the library. This specific class has historical significance within the library and its location depends on whether you are using the older 3.x series or the modern 4.x releases. Quick Download Links
For (Current): Download commons-collections4-4.4.jar .
In the latest versions (4.1+), MultiValueMap has been deprecated . Developers are encouraged to use the more robust MultiValuedMap interface and its implementations, such as ArrayListValuedHashMap . MultiValueMap (Apache Commons Collections 4.5.0 API)
You can obtain the necessary JAR files from these official sources: