Mybatis获取接口中string类型参数问题(一)

Preparing: select max(cast(substring(certificat0_.certificateNo, 11, 6) as signed)) as col_0_0_ from u_usercert_tab certificat0_ WHERE certificat0_.certificateNo like '?%' Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4bb84e56] org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='certNum', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #1 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0). Preparing: select max(cast(substring(certificat0_