JAVA 反射

public class ReflectasmClient {
    public static void main(String[] args) throws Exception {
        int number = 10000000;
        testJdkReflect(number);
        System.out.println();
        testReflectAsm(number);
    }
   
    public static void testJdkReflect(int number) throws Exception {
        SomeClass someObject = new SomeClass();
        Method method = SomeClass.class.getMethod("foo", String.class);
            long begin = System.currentTimeMillis();
            for (int j = 0; j < number; j++) {

                method.invoke(someObject, "Unmi");
            }
            System.out.print("结束组" + (System.currentTimeMillis() - begin +" "));
    }
   
    public static void testReflectAsm(int number) {
        SomeClass someObject = new SomeClass();
        MethodAccess access = MethodAccess.get(SomeClass.class);
            long begin = System.currentTimeMillis();
            for (int j = 0; j < number; j++) {       
                access.invoke(someObject, "foo", "Unmi");
            }
            System.out.print("结束组" + (System.currentTimeMillis() - begin +" "));
    }
}



结论:MethodAccess  每次缓存，性能高于JDK 原生的反射

用附中的源码包，和 asm-3.3.1.jar