init and destroy

The init-method and destroy-method of spring can do things before or after invoke function. Here I will show you an example.

public interface StudentService {
    public void helloSpring(String str);
}

public class StudentServiceImpl implements StudentService,Serializable{    
    private static final long serialVersionUID = 6130145558179499205L;

    @Override
    public void helloSpring(String str) {
        // TODO Auto-generated method stub
        System.err.println("run  this is "+str);
    }

    public void inits(){
        System.err.println("do before run helloSpring");
    }

    public void shutdown(){
        System.err.println("destroy studentService instence before invoke shutdown() function");
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="  
         http://www.springframework.org/schema/context   
         http://www.springframework.org/schema/context/spring-context-3.0.xsd    
     http://www.springframework.org/schema/beans   
     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
     http://www.springframework.org/schema/tx   
     http://www.springframework.org/schema/tx/spring-tx-3.0.xsd  
     http://www.springframework.org/schema/aop   
     http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">


    <bean id="stu" class="com.kincolle.StudentServiceImpl" init-method="inits" destroy-method="shutdown"></bean>

</beans>

public class TestDemo implements Serializable {

    private static final long serialVersionUID = 6343872716391435079L;

    public static void main(String[] args){


        ApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml"});

        StudentService studentService = context.getBean("stu", StudentService.class);

        studentService.helloSpring("Hello! Spring!");

        ((ClassPathXmlApplicationContext) context).close();  

    }
}