[QuickServer]clientHandler.sendClientMsg()须小心

    

     这个方法是会抛出IOException的。 我们写代码调用这个方法时,调用者往往本身也是throws IOException,因此IDE不会提醒我们处理sendClientMsg()引起的异常,结果一旦sendClientMsg()出错,调用方法也整个地出错

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