In Spring framework, you can wire beans automatically with auto-wiring
feature. To enable it, just define the “autowire” attribute in
In Spring, 5 Auto-wiring modes are supported.
no – Default, no auto wiring, set it manually via “ref” attribute
byName – Auto wiring by property name. If the name of a bean is same as the
name of other bean property, auto wire it.
byType – Auto wiring by property data type. If data type of a bean is
compatible with the data type of other bean property, auto wire it.
constructor – byType mode in constructor argument.
autodetect – If a default constructor is found, use “autowired by
constructor”; Otherwise, use “autowire by type”.
http://www.mkyong.com/spring/spring-auto-wiring-beans-in-xml/