spring-继承

关于继承

1、如果一个类在spring配置文件中，但是不想让整个类创建对象，则用abstract="true" 2、如果让一个子类拥有父类的属性，则parent="父类id" 例子spring的配置文件applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<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="parent" class="extend.Parent" abstract="true">
<property name="s" value="sssssssss"></property>
</bean>
<bean id="son" class="extend.Son" parent="parent"></bean>
</beans>

父类Parent

public class Parent {
public String s;
public String getS() {
return s;
}
public void setS(String s) {
this.s = s;
}
public void show(){
System.out.println("parent show");
}
}

子类Son

public class Son extends Parent{
public void printS(){
System.out.println(getS());
}
}

测试类

public class Test_extend {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
Son son = (Son) context.getBean("son");
son.show();
son.printS();
}
}