Spring also uses JSR-250-based annotations, which include @PostConstruct, @PreDestroy, and @Resource annotations

@PostConstruct and @PreDestroy notes:

You can use @PostConstruct annotations as an alternative to the initialization callback function, @PreDestroy comment as an alternative to destroying the callback function, as explained in the following example.

Java

 Public classHelloWorld {PrivateString message;  Public voidsetmessage (String message) { This. Message =message; }    PublicString getMessage () {System.out.println ("Your Message:" +message); returnmessage; } @PostConstruct Public voidinit () {System.out.println ("Bean is going through init."); } @PreDestroy Public voiddestroy () {System.out.println ("Bean would destroy now."); }}

Beans.xml

<id= "HelloWorld"  class= " Com.tutorialspoint.autowire.jsr.HelloWorld "><name=" message "  value=" Hello world! " /> </ Bean >　　

@Resource notes:

@Resource Note Use a ' name ' property, which is injected as a bean name. You can say that it follows the By-name automatic connection semantics

If a ' name ' is not explicitly specified, the default name is derived from the field name or Setter method.

 Public classTextEditor {Privatespellchecker spellchecker; @Resource (Name= "Spellchecker")    Public voidSetspellchecker (spellchecker spellchecker) { This. Spellchecker =spellchecker; }    Publicspellchecker Getspellchecker () {returnspellchecker; }    Public voidspellcheck () {spellchecker.checkspelling (); }}

Spring also uses JSR-250-based annotations, which include @PostConstruct, @PreDestroy, and @Resource annotations