接口：
package org.com.test.spring; public interface PersonAction { public void sayHello(); }
实现类：
package org.com.test.spring; public class PersonActionImpl implements PersonAction { @Override public void sayHello() { System.out.println("Hello!"); } }
方法Bean：
package org.com.test.spring; public class ActionBean { PersonAction personAction; public void setPersonAction(PersonAction personAction) { this.personAction = personAction; } public void say() { personAction.sayHello(); } }
模拟测试类：
package org.com.test.spring; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; public class SpringTest { public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException { // 模拟spring注册bean Map<String, Object> map = new HashMap<>(); map.put("actionBean", "org.com.test.spring.PersonActionImpl"); // 模拟spring获取bean String beanName = (String) map.get("actionBean"); Class<?> cls = Class.forName(beanName); Object object = cls.newInstance(); // 模拟spring依赖注入，set方法 ActionBean action = new ActionBean(); Method method = action.getClass().getMethod("setPersonAction", PersonAction.class); method.invoke(action, object); // 模拟bean方法调用 action.say(); } }
结果：
原文：https://www.cnblogs.com/lshspace/p/9304260.html