package org.g4studio.demo.local.reflect;
import java.lang.reflect.Method;
import org.g4studio.common.util.SpringBeanLoader;
import org.g4studio.core.metatype.Dto;
import org.g4studio.core.metatype.impl.BaseDto;
public class RunReflectDemo {
/**
* 演示Java反射使用实例(基于Java原生方式和基于字节码生成方式) 后者性能优于前者
*
* @author XiongChun
* @throws Exception
* @since 2013-02-19
*/
public static void main(String[] args) throws Exception {
//testJdkReflect();
testJdkReflect3();
//testReflectAsm();
}
/**
* Java原生反射方法调用
*
* @throws Exception
*/
public static void testJdkReflect() throws Exception {
StudentClass studentClass = new StudentClass();
long begin = System.currentTimeMillis();
Method method = StudentClass.class.getMethod("sayHi", String.class);
for (int j = 0; j < 1000; j++) {
method.invoke(studentClass, "Afghan007");
}
System.out.print("耗时：" + (System.currentTimeMillis() - begin) + " 毫秒");
}
/**
* Java原生反射：对象实例-方法调用
*
* @throws Exception
*/
public static void testJdkReflect2() throws Exception {
Class c=Class.forName("org.g4studio.demo.assist.reflect.StudentClass");
Method method = c.getMethod("sayHi", String.class);
method.invoke(c.newInstance(), "Afghan007");
}
/**
* Java原生反射：反射动态调用SpringBean
*
* @throws Exception
*/
public static void testJdkReflect3() throws Exception {
Object object = SpringBeanLoader.getSpringBean("demoService");
Class c = object.getClass();
Method method = c.getMethod("sayHi", Dto.class);
Dto dto = new BaseDto();
dto.put("name", "Afghan007");
method.invoke(object, dto);
}
/**
* ReflectAsm反射方法调用
* !依赖包asm.jar版本冲突,暂时不用此种方式进行反射
* asm.jar需要升级到4.0
* @throws Exception
*/
public static void testReflectAsm() {
/*
StudentClass studentClass = new StudentClass();
long begin = System.currentTimeMillis();
MethodAccess access = MethodAccess.get(StudentClass.class);
for (int j = 0; j < 100000000; j++) {
access.invoke(studentClass, "sayHi", "Afghan007");
}
System.out.print("耗时：" + (System.currentTimeMillis() - begin) + " 毫秒");
}
*/
}
}