注入抽象类的子类

public abstract class TestBean {
    private int a =0;
}

public class TestBeanChild extends TestBean {
    int b = 1;

    public void execute() {
        System.out.println("132");
    }
}

    <bean id="testBeanChild" class="com.yundaex.wms.config.TestBeanChild"  />

    @Autowired
    private TestBean a;

实际注入的是抽象类的子类

TestBeanChild，属性为a=0,b=1