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”

https://mkyong.com/spring/spring-auto-wiring-beans-in-xml/