1.Spring automatic scanning needs to be added as follows
This "context: component", which means, to enable automatic scanning feature in the Spring bean configuration file. base-package is specified storage components, Spring will scan the folder and find Bean (annotated as @Component) and registered to Spring container.
<context:component-scan base-package="com.yiibai.customer" />
Path packet may use wildcards apparatus, as follows:. Com * all files in the package com.
2. Auto Scan comment
By default, Spring lowercase characters in the first member - the 'CustomerService' to 'CustomerService'. The assembly can be retrieved to the name "customerService", the name can be retrieved by bean @Service ( "AAA") becomes AAA, annotations are several types:
@Component – 指示自动扫描组件。
@Repository – 表示在持久层DAO组件。
@Service – 表示在业务层服务组件。
@Controller – 表示在表示层控制器组件。
Note: Some @Repository, @Service or @Controller are annotated as @Component. Therefore, we can only use @Component automatically scan all the components? Yes, Spring will automatically scan @Component notes of all components.
3. Notes Filter
Comprising:
<context: the include filter-type = "cases. 5" expression = "follows" />
does not include:
<context: the exclude filter-type = "cases. 5" expression = "follows" />
type types are as follows:
1、type=annotation，必须由注解，过滤器扫描使用指定注解所标注的那些类。具体来说，就是@Component，@Service，@Repository，@Controller这几个构造型注解所在的类。
expression=有4个值，这种限定方式是必须有@Component等注解的。
org.springframework.stereotype.Component;
org.springframework.stereotype.Controller;
org.springframework.stereotype.Repository;
org.springframework.stereotype.Service;
2、type=assignable，注解不是必要的，过滤器扫描派生于expression属性所指定类型的那些类，所谓的派生，具体的实现类的路径。
expression=接口类路径
3、type=aspectj，过滤器扫描与expression属性所指定的AspectJ表达式所匹配的那些类。
4、type=custom，使用自定义的org.springframework.core.type.TypeFilter实现类，该类由expression属性指定。
5、type=regex，过滤器扫描类的名称与expression属性所指定的正则表达式所匹配的那些类。
As follows: not included in these documents are marked with @Service
<context:component-scan base-package="com.yiibai.customer" >
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Service" />
</context:component-scan>