前端传递对象到后端不能将json转成对象的问题

[2019-03-07 11:39:17.883] [7988] [http-nio-9005-exec-4] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet].log - Servlet.service() for servlet [dispatcherServlet] in context with path [/api/product] threw exce

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