Guice注入泛型类型

Question

我正在尝试用Guice注入泛型类型。我有存储库

public class Cursor<T> {

    @Inject
    protected Repository<T> repository;

所以当我创建光标时

Answer 1

您必须使用TypeLiteral：

import com.google.inject.AbstractModule;
import com.google.inject.TypeLiteral;

public class MyModule extends AbstractModule {

  @Override
  protected void configure() {
    bind(new TypeLiteral<Repository<User>>() {}).to(UserRepository.class);
  }
}

获取游标的实例

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.TypeLiteral;

public class Main {

  public static void main(String[] args) {
    Injector injector = Guice.createInjector(new MyModule());
    Cursor<User> instance = 
        injector.getInstance(Key.get(new TypeLiteral<Cursor<User>>() {}));
    System.err.println(instance.repository);
  }
}

更多详细信息请参见常见问题解答。