何时调用SpringBeans销毁方法？

Z时代
2024-01-10
分类：问答

我已经在bean的“销毁方法”中放入了sysout语句。当我运行示例代码时，sysout没有得到输出。这是否意味着销毁方法未得到调用？

测试类别：

  package spring.test;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.support.ClassPathXmlApplicationContext;
  public class InitTest {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("InitTestContext.xml");
        InitTestBean bean = (InitTestBean)ctx.getBean("InitTestBean");
        bean.display();
    }
  }

The Bean

  package spring.test;
  public class InitTestBean {
    private String prop1;
    private String prop2;
    public InitTestBean(String prop1, String prop2) {
        System.out.println("Instantiating InitTestBean");
        this.prop1 = prop1;
        this.prop2 = prop2;
    }
    public void setProp1(String prop1) {
        System.out.println("In setProp1");
        this.prop1 = prop1;
    }
    public void setProp2(String prop2) {
        System.out.println("In setProp2");
        this.prop2 = prop2;
    }
    public String getProp1() {
        return prop1;
    }
    public String getProp2() {
        return prop2;
    }
    public void display() {
        System.out.println("Prop1 is " + prop1);
        System.out.println("Prop2 is " + prop2);
    }
    public void initialize(){
        System.out.println("In initialize");
        this.prop1 = "init-prop1";
        this.prop2 = "init-prop2";
    }
    public void teardown() {
        System.out.println("In teardown");
        this.prop1 = null;
        this.prop2 = null;
    }
  }

配置文件：

<?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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <bean id="InitTestBean" class="spring.test.InitTestBean" init-method="initialize" destroy-method="teardown">
        <constructor-arg value="Prop1" />
        <constructor-arg value="Prop2" />
        <property name="prop1" value="setProp1"/>
        <property name="prop2" value="setProp2"/>
    </bean>
</beans>