Spring4.x中可以為子類注入子類對應的泛型型別的成員變數的引用

目錄：

package generic;
import org.springframework.beans.factory.annotation.Autowired;
/**
 * @author chenpeng
 * @date 2018/6/3 13:42
 */
public class BaseService<T> {
    @Autowired//整個類不使用註解，該地方使用註解是為了讓子類繼承這個註解
protected BaseRepository<T> repository;
    public void 
 
save(){
        System.out.println("add....");
System.out.println(repository);
}
}

@Service
public class UserService extends BaseService<User> {

}

public class BaseRepository<T> {


}

@Repository
public class UserRepository extends BaseRepository<User> {

}

public class GenericTest {
    public static void 
 
main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("bean_generic.xml");
UserService userService = (UserService) context.getBean("userService");
userService.save();
}
}