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Mybatis中的jdbcType的作用
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Mybatis中的jdbcType的作用 使用MyBatis框架做更新操作時，在該字段需要更新的內容為空時，就會出現1111錯誤，也就是無效的列類型，這個時候你就要使用jdbcType。至于什么時候要使用到javaType我還沒遇到過，而且我也沒有聽說過要使用javaType。
前天遇到一個問題 異常顯示如下：?
引用
Xml代碼??
<insert?id="insertCustomerLog"?parameterType="map">?? ??????insert?into?customer_log?? ??????(?? ??????ID,?? ??????CUSTOMER_SERVICE_USER_NAME,?? ??????user_name,?? ??????CONTENT,?? ??????LOG_FIRST_TYPE,?? ??????STATUS,?? ??????LINKED_ID,?? ??????FEE,?? ??????ACCOUNT_FIRST_TYPE,?? ??????ACCOUNT_SECOND_TYPE,?? ??????ACCOUNT_THIRD_TYPE,?? ??????LOG_SECOND_TYPE,?? ??????LOG_IP,?? ??????MEMO?? ??????)?? ??????values?? ??????(?? ?????????????seq_customer_log.nextval?,?? ????????????#{customerServiceUserName}?,?? ????????????#{username},?? ????????????#{content},?? ????????????#{logFirstType},?? ????????????#{status},?? ????????????#{linkedId},?? ????????????#{fee},?? ????????????#{accountFirstType},?? ????????????#{accountSecondType},?? ????????????#{accountThirdType},?? ????????????#{logSecondType},?? ????????????#{logIp},?? ????????????#{memo}?? ??????)?? ??</insert>??
引用
Xml代碼??
<insert?id="insertCustomerLog1"?parameterType="com.diyicai.customer.domain.CustomerLog">?? ????????insert?into?customer_log?? ???????????????(?? ???????????????ID,?? ???????????????CUSTOMER_SERVICE_USER_NAME,?? ???????????????user_name?,?? ???????????????CONTENT,?? ???????????????LOG_FIRST_TYPE,?? ???????????????STATUS,?? ???????????????LINKED_ID,?? ???????????????FEE,?? ???????????????ACCOUNT_FIRST_TYPE,?? ???????????????ACCOUNT_SECOND_TYPE,?? ???????????????ACCOUNT_THIRD_TYPE,?? ???????????????LOG_SECOND_TYPE,?? ???????????????LOG_IP,?? ???????????????MEMO?? ???????????????)?? ???????????????values?? ???????????????(?? ???????????????seq_customer_log.nextval?,?? ???????????????#{customerServiceUserName,jdbcType=VARCHAR}?,?? ???????????????#{username,jdbcType=VARCHAR},?? ???????????????#{content,jdbcType=VARCHAR},?? ???????????????#{logFirstType,jdbcType=NUMERIC},?? ???????????????#{status,jdbcType=NUMERIC},?? ???????????????#{linkedId,jdbcType=VARCHAR},?? ???????????????#{fee,jdbcType=NUMERIC},?? ???????????????#{accountFirstType,jdbcType=NUMERIC},?? ???????????????#{accountSecondType,jdbcType=NUMERIC},?? ???????????????#{accountThirdType,jdbcType=NUMERIC},?? ???????????????#{logSecondType,jdbcType=NUMERIC},?? ???????????????#{logIp,jdbcType=VARCHAR},?? ???????????????#{memo,jdbcType=VARCHAR}?? ???????????????)?? ????</insert>??
Xml代碼??
<insert?id="BasicUserInfoDaoImpl.testMap"?parameterClass="java.util.HashMap">?? ????????????????insert?into?customer_log?? ????????????????(?? ????????????????ID,?? ????????????????CUSTOMER_SERVICE_USER_NAME,?? ????????????????user_name,?? ????????????????CONTENT,?? ????????????????LOG_FIRST_TYPE,?? ????????????????STATUS,?? ????????????????LINKED_ID,?? ????????????????FEE,?? ????????????????ACCOUNT_FIRST_TYPE,?? ????????????????ACCOUNT_SECOND_TYPE,?? ????????????????ACCOUNT_THIRD_TYPE,?? ????????????????LOG_SECOND_TYPE,?? ????????????????LOG_IP,?? ????????????????MEMO?? ????????????????)?? ????????????????values?? ????????????????(?? ?????????????????????seq_customer_log.nextval?,?? ??????????????????????#customerServiceUserName#?,?? ??????????????????????#username#,?? ??????????????????????#content#,?? ??????????????????????#logFirstType#,?? ??????????????????????#status#,?? ??????????????????????#linkedId#,?? ??????????????????????#fee#,?? ??????????????????????#accountFirstType#,?? ??????????????????????#accountSecondType#,?? ??????????????????????#accountThirdType#,?? ??????????????????????#logSecondType#,?? ??????????????????????#logIp#,?? ??????????????????????#memo#?? ????????????????)?? ????</insert>??
Java代碼??
if?(parameter?==?null)?{?? ??if?(jdbcType?==?null)?{?? ??try?{?? ??ps.setNull(i,?JdbcType.OTHER.TYPE_CODE);?? ??}?catch?(SQLException?e)?{?? ??throw?new?TypeException("Error?setting?null?parameter.?Most?JDBC?drivers?require?that?the?JdbcType?must?be?specified?for?all?nullable?parameters.?Cause:?"?+?e,?e);?? ??}?? ??}?else?{?? ??ps.setNull(i,?jdbcType.TYPE_CODE);?? ??}?? ??}?else?{?? ??setNonNullParameter(ps,?i,?parameter,?jdbcType);?? ??}??
引用
還有在向oracle插入數據時，mybatis3報Error setting null parameter. Most JDBC drivers require that the JdbcType must be specified for all nullable parameters，是由于參數出現了null值,對于Mybatis,如果進行操作的時候,沒有指定jdbcType類型的參數,mybatis默認jdbcType.OTHER導致,給參數加上jdbcType可解決(注意大小寫)?
轉載于:https://my.oschina.net/architectliuyuanyuan/blog/1806447
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