这主要是数据库中字段类型为LVARCHAR转换出现的问题，可以在mybatis-config.xml中添加如下配置：
<typeHandlers>
<typeHandler handler="org.apache.ibatis.type.StringTypeHandler" jdbcType="LONGVARCHAR" javaType="string"/>
</typeHandlers>
gbase整合mybatis出现： Cause: java.sql.SQLException: Can't convert to: binary stream
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