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                ## 一、需求 今天一個“懶”程序員突然跑過來說:“反射好麻煩,我要提點需求。” 聽到這句話后我就知道,今天一定不好過了,奇葩需求又來了。 我們之前寫反射都是要這么寫: ~~~ public static <T> T create(HttpRequest httpRequest) { Object httpRequestEntity = null; try { Class<T> httpRequestEntityCls = (Class<T>) Class.forName(HttpProcessor.PACKAGE_NAME + "." + HttpProcessor.CLASS_NAME); Constructor con = httpRequestEntityCls.getConstructor(HttpRequest.class); httpRequestEntity = con.newInstance(httpRequest); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } return (T) httpRequestEntity; } ~~~ 因為反射在開發中很少用(做普通的業務開發的話),僅僅在自己寫一些框架和注解框架時會用到,所以對api總是不熟悉。每次用到api都要去網上查,查了后又得自己實驗下,很不爽。更差勁的是這樣寫法可讀性十分低下。我不希望這樣寫反射,我希望反射能像 ~~~ String str = new String(); ~~~ 這樣簡單,**一行代碼搞定!**。 此外,有很多人都說反射影響性能,在開發的時候要避免用反射。那么什么時候該用反射,什么時候不用反射呢?用什么方式來避免反射呢?如果不明白**什么時候用反射**,就很難將反射活學活用了。
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