Java利用反射动态加载类实战

packagecom.web.common.utility.reflector;

importjava.io.Serializable;
importjava.lang.reflect.Constructor;
importjava.lang.reflect.Method;

/***//**
*@comany阿斯达克(上海)深圳分公司
*@authorsteven.wu
*@date2008-4-21
*@description利用反射动态加载类,并调用其方法执行。
*/
publicclassReflectorFactoryimplementsSerializable...{
publicReflectorFactory()...{
//TODOAuto-generatedconstructorstub
}

publicObjectnewInstance(StringclassName)throwsException...{
Classc=Class.forName(className);
returnc.newInstance();
}

publicObjectnewInstance(StringclassName,Object[]args)throwsException...{
Classc=Class.forName(className);
Class[]argsClass=newClass[args.length];
for(inti=0,j=args.length;i<j;i++)...{
argsClass[i]=args[i].getClass();
}
Constructorcons=c.getConstructor(argsClass);
returncons.newInstance(args);
}

//判断是否为某个类的实例
publicbooleanisInstance(Objectobj,Classcls)...{
returncls.isInstance(obj);
}
//执行无参数方法.
publicObjectinvokeMethod(Objecto,StringmethodName)
throwsException...{
Classc=o.getClass();
Methodmethod=c.getDeclaredMethod(methodName);
returnmethod.invoke(o);
}
//执行有参数方法.
publicObjectinvokeMethod(Objecto,StringmethodName,Object[]args)
throwsException...{
Classc=o.getClass();
Class[]argsClass=newClass[args.length];
for(inti=0,j=args.length;i<j;i++)...{
argsClass[i]=args[i].getClass();
}
Methodmethod=c.getMethod(methodName,argsClass);
returnmethod.invoke(o,args);
}
}