Type handler was null on parameter mapping for property 'card'. It was either not specified and/or could not be found for the javaType (com.example.firstdemo.entity.IdCard) : jdbcType (null) combination.
mybatis中数据类型与实体类数据类型不匹配异常.看一下IdCard类中的card的数据类型,是不是没有定义啊.
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