Java 包导入别名
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Java Package Import Alias
提问by Dirk Rother
Is it possible in Java to import packages and give this package import a specific name?
是否可以在 Java 中导入包并给这个包导入一个特定的名称？
I currently have a class, which uses some DTO's from a backend and a service package. In both packages the DTO's have the same name. And I think this isn't quite readable:
我目前有一个类，它使用来自后端和服务包的一些 DTO。在这两个包中，DTO 的名称相同。而且我认为这不太可读：
com.backend.mypackage.a.b.c.d.UserDto userBackend = new com.backend.mypackage.a.b.c.d.UserDto();
com.service.mypackage.a.b.c.d.UserDto userService = new com.service.mypackage.a.b.c.d.UserDto();
mapper(userBackend, userService);
This is a small example. The class is actually quite complex and has a lot more code in it.
这是一个小例子。该类实际上非常复杂，其中包含更多代码。
Does Java have something like import com.backend.mypackage.a.b.c.d.UserDto as userDtoBackendso i can shorten my source code?
Java 有没有类似的东西，import com.backend.mypackage.a.b.c.d.UserDto as userDtoBackend所以我可以缩短我的源代码？
采纳答案by folkol
No, you can not do "import x as y;" in Java.
不，您不能执行“将 x 导入为 y”；在爪哇。
What you CAN do is to extend the class, or write a wrapper class for it, and import that one instead.
您可以做的是扩展该类，或为其编写一个包装类，然后导入该类。
import com.backend.mypackage.a.b.c.UserDto;
public class ImportAlias {
static class UserDtoAlias extends com.backend.mypackage.a.b.c.d.UserDto {
}
public static void main(String[] args) {
UserDto userBackend = new UserDto();
UserDtoAlias userService = new UserDtoAlias();
mapper(userBackend, userService);
}
private static void mapper(UserDto userBackend, UserDtoAlias userService) {
// ...
}
}
回答by user253751
There is no way to do this in Java.
在 Java 中没有办法做到这一点。
