Spring---IOC和DI

application context

1.AnnotationConfigApplicationContext
2.AnnotationConfigWebApplicationContext
3.ClassPathXmlApplicationContext
4.FileSystemXmlApplicationContext
5.XmlWebApplicationContext

Wiring beans

1.Explicit configuration in XML
2.Explicit configuration in Java
3.Implicit bean discovery and automatic wiring 

Automatically wiring beans [Implicit]

1.Component scanning---Spring automatically disvocers beans to be created in application context

2.Autowiring ---Spring automatically satisfies beans bean dependencies

Component scanning

1.discoverable beans ------@Component ....
2.Scanning -----@ComponentScan. Default Scanning that(which class have @ComponentScan)package and any subpackage.
        explicit way -> basePackages={packageName,..} or basePackageClasses={xx.class,yy.class}

Annotating beans to be automatically wired

Autowiring is a means of letting Spring automatically satisfy a bean's dependencies by finding other beans in application context are a match to the bean's needs.

@Autowired --- you can use in a constructor,a setter method,or any other method,Spring will attempt to satisfy the dependency expressed in the method's parameters.

In java and In Xml [explicit]

Importing and mixing configurations

In java

1.@Import("xxx.class")
2.@ImportResource("classpath:xxx.xml")

In Xml

1.<Import resource="xxx.xml" >
2.<Import class="xxxx.config" >