学步园

public class Person implements InitializingBean, DisposableBean {
    private String name;
    private int age;

    public Person(){
        System.out.println("--------||　构造方法在调用...");
        this.name = "默认用户名";
        this.age= 250;
        System.out.println(this);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String toString() {
        return "Person{" +
                "name='" + name + '/'' +
                ", age=" + age +
                '}';
    }

    public void init(){
        System.out.println("--------||　init()正在调用...");
        this.name="init";
        this.age=998;
        System.out.println(this);
    }

    public void afterPropertiesSet() throws Exception {
        System.out.println("--------||　afterPropertiesSet()正在调用...");
        this.age=999;
        System.out.println(this);
    }

    public void destroy() throws Exception {
        System.out.println("--------||　destroy()正在调用...");
    }
}

public class BeanContextHelper {
    private static ApplicationContext _instance;

    static {
        if (_instance == null) _instance = buildApplicationContext();
    }

    private BeanContextHelper() {
    }

    /**
     * 重新构建ApplicationContext对象
     *
     * @return ApplicationContext
     */
    public static ApplicationContext buildApplicationContext() {
        return new ClassPathXmlApplicationContext("applicationContext.xml");
    }

    /**
     * 获取一个ApplicationContext对象
     *
     * @return ApplicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return _instance;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
    <bean id="person" class="com.lavasoft.springnote.ch01.Person" init-method="init" destroy-method="destroy">
        <property name="name">
            <value>lavasoft</value>
        </property>
        <property name="age">
            <value>22</value>
        </property>
    </bean>
</beans>

/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-4-17 16:58:07<br>
* <b>Note</b>: 客户端测试
*/
public class Test {
    public static void main(String args[]) {
        Test test = new Test();
        test.test();

    }
    public void test(){
        ApplicationContext context = BeanContextHelper.getApplicationContext();
        Person person = (Person) context.getBean("person");
        System.out.println("--------||　从Spring BeanFactory获取person...");
        System.out.println(person);
    }
}

--------||　构造方法在调用...
log4j:WARN No appenders could be found for logger (org.springframework.core.CollectionFactory).
log4j:WARN Please initialize the log4j system properly.
Person{name='默认用户名', age=250}
--------||　afterPropertiesSet()正在调用...
Person{name='lavasoft', age=999}
--------||　init()正在调用...
Person{name='init', age=998}
--------||　从Spring BeanFactory获取person...
Person{name='init', age=998}

Process finished with exit code 0