Google Guice绑定不支持Integer和Long

import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;

public class IntegerLongBindingExample {
    public static void main(String[] args) {
        Injector injector = Guice.createInjector(new IntegerLongModule());
        IntegerService integerService = injector.getInstance(IntegerService.class);
        LongService longService = injector.getInstance(LongService.class);

        System.out.println(integerService.getInteger());
        System.out.println(longService.getLong());
    }
}

class IntegerService {
    private Integer integer;

    @Inject
    public IntegerService(Integer integer) {
        this.integer = integer;
    }

    public Integer getInteger() {
        return integer;
    }
}

class LongService {
    private Long l;

    @Inject
    public LongService(Long l) {
        this.l = l;
    }

    public Long getLong() {
        return l;
    }
}

class IntegerProvider implements Provider<Integer> {
    @Override
    public Integer get() {
        return 42;
    }
}

class LongProvider implements Provider<Long> {
    @Override
    public Long get() {
        return 123456789L;
    }
}

class IntegerLongModule extends AbstractModule {
    @Override
    protected void configure() {
        bind(Integer.class).toProvider(IntegerProvider.class).in(Singleton.class);
        bind(Long.class).toProvider(LongProvider.class).in(Singleton.class);
    }
}