1.异常日志

[http-nio-8012-exec-44] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/crm] threw exception [Request processing failed; nested exception is org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class com.ttfund.crm.model.ResultInfo] with preset Content-Type 'application/vnd.ms-excel;charset=UTF-8'] with root cause 
org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class com.ttfund.crm.model.ResultInfo] with preset Content-Type 'application/vnd.ms-excel;charset=UTF-8'
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2.异常原因
我在控制层返回对象为ResultInfo所以会出现这个异常，将返回对象改为void就可以解决这个问题