Question

错误消息：

嵌套的异常是org.apache.ibatis.type.TypeException：无法设置>映射参数：ParameterMapping {property ='signIn'，mode = IN，> javaType = class java.util.Date，jdbcType = null， numericScale = null，> resultMapId ='null'，jdbcTypeName ='null'，expression ='null'}。原因：org.apache.ibatis.type.TypeException：使用JdbcType null为参数＃4设置非null时出错。尝试为此参数或其他配置属性设置不同的JdbcType。原因：java.sql.SQLException：参数索引超出范围（4>参数数量，即3）。

xml

    <select id="selectSignRecordList" parameterType="SignRecord" resultMap="SignRecordResult">
        <include refid="selectSignRecordVo"/>
        <where>  
            <if test="id != null  and id != '' "> and id_ = #{id}</if>
             <if test="promiseId != null  and promiseId != '' "> and promise_id = #{promiseId}</if>
             <if test="userId != null  and userId != '' "> and user_id = #{userId}</if>
             <if test="signIn != null">
              and sign_in =#{signIn,jdbcType=DATE}
                 --and sign_in  = date_format(  #{signIn}  , '%Y-%m-%d' )
--                  AND date_format(sign_in,'%y%m%d') = date_format(#{signIn},'%y%m%d')
--                  <![CDATA[   and DATE_FORMAT(sign_in, '%Y-%m-%d')=  DATE_FORMAT(#{signIn}, '%Y-%m-%d')   ]]>
--                  AND date(sign_in) = date(#{signIn,jdbcType=DATE})
              </if>
             <if test="signStatus != null  and signStatus != '' "> and sign_status = #{signStatus}</if>
             <if test="createBy != null  and createBy != '' "> and create_by = #{createBy}</if>
             <if test="createTime != null "> and create_time = #{createTime}</if>
             <if test="updateBy != null  and updateBy != '' "> and update_by = #{updateBy}</if>
             <if test="updateTime != null "> and update_time = #{updateTime}</if>
             <if test="remark != null  and remark != '' "> and remark = #{remark}</if>
         </where>
    </select>

登录名是java.util.Date

当我传入参数错误

Answer 1

最可能的问题是--是SQL中的注释开始，但是mybatis并不知道。此行（以及所有类似的行）：

--           AND date(sign_in) = date(#{signIn,jdbcType=DATE})

引起问题，因为mybatis尝试在此处的预处理语句中设置参数，但是RDBMS忽略了这一部分查询，因此该参数不存在。因此，错误消息表明参数的实际数量（数据库已知）小于客户端（mybatis）试图设置的数量。

要解决问题use xml comments而不是像这样的SQL注释：

    <select id="selectSignRecordList" parameterType="SignRecord" resultMap="SignRecordResult">
    <include refid="selectSignRecordVo"/>
    <where>  
        <if test="id != null  and id != '' "> and id_ = #{id}</if>
         <if test="promiseId != null  and promiseId != '' "> and promise_id = #{promiseId}</if>
         <if test="userId != null  and userId != '' "> and user_id = #{userId}</if>
         <if test="signIn != null">
          and sign_in =#{signIn,jdbcType=DATE}
             <!-- and sign_in  = date_format(  #{signIn}  , '%Y-%m-%d' )
              AND date_format(sign_in,'%y%m%d') = date_format(#{signIn},'%y%m%d')
              <![CDATA[   and DATE_FORMAT(sign_in, '%Y-%m-%d')=  DATE_FORMAT(#{signIn}, '%Y-%m-%d')   ]]>
              AND date(sign_in) = date(#{signIn,jdbcType=DATE})
             --> 
          </if>
         <if test="signStatus != null  and signStatus != '' "> and sign_status = #{signStatus}</if>
         <if test="createBy != null  and createBy != '' "> and create_by = #{createBy}</if>
         <if test="createTime != null "> and create_time = #{createTime}</if>
         <if test="updateBy != null  and updateBy != '' "> and update_by = #{updateBy}</if>
         <if test="updateTime != null "> and update_time = #{updateTime}</if>
         <if test="remark != null  and remark != '' "> and remark = #{remark}</if>
     </where>
</select>

在这种情况下，mybatis根本不会将注释的片段包括在SQL查询中，并且不会尝试设置参数。

无法设置用于映射ParameterMapping {property，modeIN，javaTypeclass java.util.Date的参数

1 个答案: