public class ClassA {
private ClassB classB;
public ClassB getClassB() {
return classB;
}
public void setClassB(ClassB classB) {
this.classB = classB;
}
}
public class ClassB {
private ClassA classA;
public ClassA getClassA() {
return classA;
}
public void setClassA(ClassA classA) {
this.classA = classA;
}
}
<?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.xsd">
<bean id="classA" class="ioc.cd.ClassA">
<property name="classB" ref="classB"></property>
</bean>
<bean id="classB" class="ioc.cd.ClassB">
<property name="classA" ref="classA"></property>
</bean>
</beans>
@Test
public void test() throws Exception {
// 创建IoC容器，并进行初始化
String resource = "spring/spring-ioc-circular-dependency.xml";
ApplicationContext context = new ClassPathXmlApplicationContext(resource);
// 获取ClassA的实例（此时会发生循环依赖）
ClassA classA = (ClassA) context.getBean(ClassA.class);
}