Mybatis 碰到的一些問題

1. SQL語句參數無法獲取：nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'order_ids' in 'class java.lang.String'

XML映射文件配置：

 <select id="getTransferOrderListByOrderIds" parameterType="String" resultType="HashMap">
        select *
        from   wp_transfer_order
        WHERE  ORDER_SN IN (${order_ids})
  </select>

解決方法： 將parameterType="String"參數改為傳一個自定義實體對象或者HashMap來封裝這個id參數，就可以在自定義實體對象或者HashMap中找到這個id屬性
參考地址：http://www.cnblogs.com/sishang/p/6555176.html


2. SQL語句參數錯誤：java.lang.RuntimeException: org.mybatis.spring.MyBatisSystemException: 
 nested exception is org.apache.ibatis.builder.IncompleteElementException: 　
 not find parameter map com.paycloud.interfaces.dao.AdminUserDao.AdminUserResultMap
(1) XML配置部分：

  <resultMap id="AdminUserResultMap" type="com.paycloud.interfaces.dto.AdminUserDto">
      <id column="MUID"           jdbcType="INTEGER"   property="muId" />
      <result column="ROLEID"     jdbcType="INTEGER"   property="roleId" />
      <result column="USERNAME"   jdbcType="VARCHAR"   property="userName" />
      <result column="PASSWORD"   jdbcType="VARCHAR"   property="passWord" />
      <result column="BINDIP"     jdbcType="VARCHAR"   property="bindIp" />
      <result column="LASTIP"     jdbcType="VARCHAR"   property="lastIp" />
      <result column="LASTLOGIN"  jdbcType="TIMESTAMP" property="lastLogin" />
      <result column="SALTS"      jdbcType="CHAR"      property="salts" />
      <result column="STATUS"     jdbcType="INTEGER"   property="status" />
      <result column="GOOGLECODE" jdbcType="VARCHAR"   property="googleCode" />
 </resultMap>

　　(2) SQL語句部分

　　錯誤案例:

 <!-- 添加用戶 -->
  <insert id="addAdminUser"  parameterMap="AdminUserResultMap" >
      insert into sys_admin_user
          (ROLEID,USERNAME,PASSWORD,SALTS,STATUS,LASTLOGIN, GOOGLECODE)
      values
          (#{roleId},#{userName},#{passWord},#{salts},#{status},#{lastLogin}, #{googleCode})
  </insert>

　　修改后：

 <!-- 添加用戶 -->
  <insert id="addAdminUser" parameterType="com.paycloud.interfaces.dto.AdminUserDto" >
      insert into sys_admin_user
          (ROLEID,USERNAME,PASSWORD,SALTS,STATUS,LASTLOGIN, GOOGLECODE)
      values
          (#{roleId},#{userName},#{passWord},#{salts},#{status},#{lastLogin}, #{googleCode})
  </insert>

　

3. 注釋搞的鬼：java.lang.RuntimeException: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException:
Could not set parameters for mapping: ParameterMapping{property='pageIndex', mode=IN, javaType=class java.lang.Integer, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. 
Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #4 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 (4 > number of parameters, which is 3).

<!-- 交易統計報表 -->
 <select id="getTradeDayStatistics" resultType="Hashmap">
    SELECT SUM(t.ORDER_AMOUNT) as order_amount
    FROM wp_trade_order t
    WHERE t.ORDER_STATUS=1
          <if test="tranType != null and tranType != ''">         and t.TRAN_TYPE    = #{tranType}        </if>
          <if test="channelCode != null and channelCode != ''">   and t.CHANNEL_CODE = #{channelCode}     </if>
          <if test="startTime != null and startTime != ''">       and t.FINISH_TIME  >= #{startTime}    </if>
          <if test="endTime != null and endTime != ''">           and t.FINISH_TIME  <= #{endTime}      </if>
          <if test="minPayMoney != null and minPayMoney != ''">   and t.ORDER_AMOUNT >= #{minPayMoney} </if>
          <if test="maxPayMoney != null and maxPayMoney != ''">   and t.ORDER_AMOUNT <= #{maxPayMoney} </if>
   /*limit #{pageIndex}, #{pageSize}*/
 </select>

　有點粗心，沒太在意注釋的方式，因為顏色肯定是變灰了，所以出現這個錯誤。之后把注釋去掉就好了。

 

  4.插入時間出現的問題 ： Error querying database.  Cause: java.lang.IllegalArgumentException: invalid comparison: java.util.Date and java.lang.String  

 <!-- 生成財務流水 -->
 <insert id="insertBillings" parameterType="com.paycloud.interfaces.dto.BillingsDto">
   INSERT INTO wp_billings
   <trim prefix="(" suffix=")" prefixOverrides=",">
      <if test="partnerId != null and partnerId != ''">,   PARTNER_ID         </if>
      <if test="tradeTime != null and tradeTime != ''">, TRADE_TIME </if>
   </trim>
   <trim prefix="VALUES (" suffix=")" prefixOverrides=",">
      <if test="partnerId != null and partnerId != ''">,    #{partnerId}      </if>
      <if test="tradeTime != null and tradeTime != '' ">, #{tradeTime} </if>
   </trim>
12  </insert>

   這是mybatis 3.3.0中對於時間參數進行比較時的一個bug. 如果拿傳入的時間類型參數與空字符串''進行對比判斷則會引發異常.

  所以  and tradeTime != ' ' 刪除，只保留非空判斷就正常了