Spring入门之Springbean定义的继承

Spring中的bean之间的继承和一般的po类继承是不一样的，他们之间的继承不能简单的使用extends关键字来实现

bean之间的继承需要在xml配置文件中配置

bean继承实例：/h5>

//子类
public class Test {

    private String msg1;
    private String msg2;
    private String msg3;

    public String getMsg1() {
        return msg1;
    }
    public void setMsg1(String msg1) {
        this.msg1 = msg1;
    }
    public String getMsg2() {
        return msg2;
    }
    public void setMsg2(String msg2) {
        this.msg2 = msg2;
    }
    public String getMsg3() {
        return msg3;
    }
    public void setMsg3(String msg3) {
        this.msg3 = msg3;
    }

}


//父类
public class ParentTest {

    private String msg1;
    private String msg2;

    public String getMsg1() {
        return msg1;
    }
    public void setMsg1(String msg1) {
        this.msg1 = msg1;
    }
    public String getMsg2() {
        return msg2;
    }
    public void setMsg2(String msg2) {
        this.msg2 = msg2;
    }

}

//xml配置文件
<!-- 继承的配置 -->
        <bean id="test" class="org.spring.extendTest.Test" parent="parentTest">
            <property name="msg1" value="test1" />
            <property name="msg3" value="test3" />
        </bean>
        <bean id="parentTest" class="org.spring.extendTest.ParentTest">
            <property name="msg1" value="pptest1" />
            <property name="msg2" value="pptest2" />
        </bean>

//测试主程序
public class TestMain {

    public static void main(String[] args){

        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");

        Test parentTest = context.getBean("test",Test.class);

        System.out.println("msg1->"+parentTest.getMsg1());
        System.out.println("msg2->"+parentTest.getMsg2());
    }
}

在子类的bean配置中并没有设置msg2的值，输出的结果为父类的msg2的值，实现了bean之间的继承