小程序传参为空导致后端json解析异常

 然后就报异常:Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance

于是我就把那行代码给取消掉就好了默认为null

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转载自blog.csdn.net/weixin_43167662/article/details/121397277