问题描述
我已经开始使用 Spring 3 开发一个新项目,并且我正在使用注释.我喜欢我可以连接我的类来注入依赖项,但我知道让 context:component-scan
从基础包开始是一种不好的做法.
I've begun work on a new project using Spring 3 and I'm using annotations. I love that I can wire up my classes to get dependencies injected, but I know it's a bad practice to have context:component-scan
start at the base package.
我正在使用一个 DispatcherServlet
,它有自己的 xml 配置文件.这也是一个 context:component-scan
.当我第一次开始学习 Spring 时,我的组件扫描中有重叠,并且看到了多次创建的 bean.我想避免这种情况.
I'm using a DispatcherServlet
which has its own xml configuration file. In that is also a context:component-scan
. When I first started learning Spring I had overlap in my component scans and saw beans created multiple times. I'd like to avoid that.
有什么好方法可以组织我的包或组件扫描以覆盖所有 bean 而不会重复?
What is a good way to organize either my packages or my component scans to cover all the beans without duplication?
目前我有这样的包:
my.package.controller
my.package.dao
my.package.entity
my.package.service
my.package.util
如果我在所有这些包中都有 bean,那么简单的方法似乎是把 <context:component-scan base-package="my.package"></context:component-scan>
进入 applicationContext.xml 并完成.
If I have beans in all those packages then it seems like the easy way out would be to put <context:component-scan base-package="my.package"></context:component-scan>
into applicationContext.xml and be done with it.
扫描调度程序的xml中的my.package.controller
和applicationContext.xml中的其余部分(不包括my.package.controller)会更好吗?
Would it be better to scan my.package.controller
in the dispatcher's xml and the rest (excluding my.package.controller) in applicationContext.xml?
或者我应该将所有带注释的课程安排在一个区域,而将其他所有内容安排在另一个区域?比如:
Or should I arrange all my annotated classes in one area and everything else in another? Something like:
my.package.spring.controller
my.package.spring.dao
my.package.spring.entity
my.package.spring.service
my.package.spring.util
my.package.notannotated
my.package.notannotated2
我正在使用 @Autowired 将日志记录添加到我的大部分类(如果不是全部的话),所以我不知道我会有任何不会被注释的类.
I'm using @Autowired to add logging to most if not all of my classes so I don't know that I'll have any classes that won't be annotated.
我讨厌卡在配置上...我宁愿卡在代码中,所以如果有人可以提供任何提示,我很乐意欢迎他们.
I hate getting stuck on configuration...I'd rather be stuck in code, so if someone can offer any tips I'd readily welcome them.
谢谢!
推荐答案
是的 - 在您的主要上下文中扫描除控制器之外的所有内容
Yes - in your main context scan everything except controllers
<context:component-scan base-package="my.package">
<context:exclude-filter type="regex" expression="my.package.controller.*"/>
</context:component-scan>
在您的 DispatcherServlet 上下文中,只需扫描控制器包.
and in your DispatcherServlet context just scan the controller package.
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