Guava Google在Java中使用Reflections

Question

I am trying to use Reflections in my Java project (also using Spring boot), and I have to get all the classes of a package that implements an interface.

public static Object[] getClasses(String packageName) throws IOException
  {
    Reflections r = new Reflections(packageName);
    Set<Class<? extends EntityXML>> allClasses = r.getSubTypesOf(EntityXML.class);
    return (Object[]) allClasses.toArray();
  }

But it returns me always this error.

java.lang.NoSuchMethodError: com.google.common.collect.Sets$SetView.iterator()Lcom/google/common/collect/UnmodifiableIterator;
        at org.reflections.Reflections.expandSuperTypes(Reflections.java:380)
        at org.reflections.Reflections.<init>(Reflections.java:126)
        at org.reflections.Reflections.<init>(Reflections.java:168)
        at org.reflections.Reflections.<init>(Reflections.java:141)
        at gcs.fds.focus.lib.utils.FindPackages.getClasses(FindPackages.java:14)
        ...

I try to import the google.guava package to avoid this error, and it fix it, but I would like not to import it, because it is a package without use in my project.

Any idea about how to avoid this error?

Answer 1

Okey I solved!

I deleted the google.guava dependency, and I make a

mvn dependency:tree

where I could see that other of my dependencies imports also google.guava, but version 19 which I read that makes this conflict. (everit.json dependency), so I exclude the google.guava from this dependency and it works!

<dependency>
    <groupId>org.everit.json</groupId>
    <artifactId>org.everit.json.schema</artifactId>
    <version>1.3.0</version>
    <exclusions>
        <exclusion>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
        </exclusion>
    </exclusions>
</dependency>