Exception 'java.lang.Exception' is never thrown in the method less

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Exception ‘java.lang.Exception’ is never thrown in the method less

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异常描述

• 使用 IDEA 开发过程中发现已有方法上抛出异常，但是异常代码的颜色是浅灰色的，鼠标移到代码上提示上述异常

Exception ‘java.lang.Exception’ is never thrown in the method less… (Ctrl+F1)
This inspection reports exceptions that are declared in a method’s signature but never thrown by the method itself or its implementations/derivatives. Since this inspection requires global code analysis, it is only available in batch inspection mode. A limited version for use in editor highlighting is available as General | Redundant throws declaration.

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异常分析

• 方法中不需要抛出异常，因为没有需要抛出异常的代码
• 在 call() 方法上显示的抛出异常，但是 call() 方法内部却并无异常抛出，也没有会出现异常的代码内容

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异常反思

• 开发过程中从底层编码开始需要向上抛出异常，异常交给 Controller 层进行处理