在Spring中,可以使用 init-method 和 destroy-method 在bean 配置檔屬性用於在bean初始化和銷毀某些動作時。這是用來替代 InitializingBean和DisposableBean介面。
示例
這裏有一個例子向您展示如何使用 init-method 和 destroy-method。
package com.zaixian.customer.services; public class CustomerService { String message; public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public void initIt() throws Exception { System.out.println("Init method after properties are set : " + message); } public void cleanUp() throws Exception { System.out.println("Spring Container is destroy! Customer clean up"); } }
File : applicationContext.xml, 在bean中定義了init-method和destroy-method屬性。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean id="customerService" class="com.zaixian.customer.services.CustomerService" init-method="initIt" destroy-method="cleanUp"> <property name="message" value="i'm property message" /> </bean> </beans>
執行下麵的程式代碼:
package com.xuhuhu.common; import org.springframework.context.ConfigurableApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.zaixian.customer.services.CustomerService; public class App { public static void main( String[] args ) { ConfigurableApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"}); CustomerService cust = (CustomerService)context.getBean("customerService"); System.out.println(cust); context.close(); } }
ConfigurableApplicationContext.close將關閉應用程式上下文,釋放所有資源,並銷毀所有緩存的單例bean。
輸出
Init method after properties are set : I'm property message com.zaixian.customer.services.CustomerService@5f49d886 Spring Container is destroy! Customer clean up
initIt()方法被調用,消息屬性設置後,在 context.close()調用後,執行 cleanUp()方法;
建議使用init-method 和 destroy-methodbean 在Bena配置檔,而不是執行 InitializingBean 和 DisposableBean 介面,也會造成不必要的耦合代碼在Spring。
下載源代碼 – http://pan.baidu.com/s/1hreksq4