mybatis 为什么要设置jdbcType

Exception in thread "main" org.springframework.jdbc.UncategorizedSQLException: Error setting null for parameter #6 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型: 1111 
; uncategorized SQLException for SQL []; SQL state [99999]; error code [17004]; 无效的列类型: 1111; nested exception is java.sql.SQLException: 无效的列类型: 1111 

对应的sqlmapper如下：

<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>  

原因：

MyBatis 插入空值时，需要指定JdbcType
mybatis insert空值报空值异常，但是在pl/sql不会提示错误，主要原因是mybatis无法进行转换，

将sqlmapper修改为：

<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>  

也可以用mybatis 的 if标签

  <if test="customerServiceUserName== null">
           
  </if>