ARN DefaultHandlerExceptionResolver:419 - Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.itheima.entity.Result com.itheima.controller.CheckGroupController.add(com.itheima.domain.CheckGroup,java.lang.Integer[])
原因:过于粗心，在前端页面重置formData数据时,把本来是对象的formData重置为了数组!!!
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