mybatis的报错总结_____2Error updating database. Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the ri

（接口的xml配置文件中：）

1  <update id="modifyBill" parameterType="Bill">
2         update smbms_bill
3         <trim suffix="set" prefixOverrides="," prefix="where id=#{id}">
4         <if test="billCode!=null">billCode=#{billCode},</if>
5             <if test="productName!=null">productName=#{productName},</if>
6             <if test="productDesc!=null">productDesc=#{productDesc}</if>
7         </trim>
8     </update>

报错日志：

Error updating database.  Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘where id=3 billCode=‘33333‘,


//可以看到日志中打印出来的sql语句也是有错的，如下：
### SQL: update smbms_bill          where id=? billCode=?,             productName=?,             productDesc=? set

正确的示范：

接口的xml配置文件中：

 <!--最后一个没有逗号~~~~~-->
    <update id="modifyBill" parameterType="Bill">
        update smbms_bill
        <trim prefix="set" prefixOverrides="," suffix="where id=#{id}">
        <if test="billCode!=null">billCode=#{billCode},</if>
            <if test="productName!=null">productName=#{productName},</if>
            <if test="productDesc!=null">productDesc=#{productDesc}</if>
        </trim>
    </update>

打印出来的sql语句：

[com.xbf.dao.bill.BillMapper.modifyBill]-==>  Preparing: update smbms_bill set billCode=?, productName=?, productDesc=? where id=? 

总结：（网上找的图，感觉说的很清晰！）

prefix：字首 eg：set

prefixOverrides：字首的替换 eg：  ，

suffix：后缀 eg：where id=#{ id }

mybatis的报错总结_____2Error updating database. Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the ri

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