Spring Learning notes-Using spring Java-based configuration

We need to use @component annotations to define a configuration class, in which we define the bean in the configuration class:

 Packagecom.moonlit.myspring;ImportOrg.springframework.context.annotation.Bean;Importorg.springframework.context.annotation.Configuration; @Configuration Public classMoonlitconfig {@Bean PublicWeapon Halberd () {return Newhalberd (); } @Bean PublicHero Guanyu () {guanyu Gy=NewGuanyu ();        Gy.setweapon (Halberd ()); returnGy; }}

The Guanyu classes here are as follows:

 Packagecom.moonlit.myspring; Public classGuanyuImplementsHero {Privateweapon Weapon;  Public voidperform () {System.out.println ("Guan Yu pick up his weapon.");    Weapon.attack (); }     PublicWeapon Getweapon () {returnweapon; }     Public voidSetweapon (Weapon weapon) { This. Weapon =weapon; }}

Then we can use this @bean annotation-based bean, and the following test class is used to demonstrate the effect:

 Package Com.moonlit.practice; Import Com.moonlit.myspring.Hero; Import Com.moonlit.myspring.MoonlitConfig;  Public class testpractive {    publicstaticvoid  main (string[] args) {         New  moonlitconfig (). Guanyu ();        Hero.perform ();    }}

The output effect is as follows:

Guan Yu pick up his weapon.halberd is attacking!!!

Spring Learning notes-Using spring Java-based configuration