批量更新sql
<update id="updateAutoAppraiseInfo" parameterType="Object">
<foreach collection="appraises" item="appraise" index="appraises" separator=";">
UPDATE project_auto_appraise SET
<trim suffixOverrides=",">
<if test="appraise.artificialValuation != null and appraise.artificialValuation != '' ">
artificial_valuation=#{appraise.artificialValuation},
</if>
<if test="appraise.difference != null and appraise.difference != ''">
difference=#{appraise.difference},
</if>
<if test="appraise.remark != null and appraise.remark != ''">
remark=#{appraise.remarks},
</if>
</trim>
WHERE sum_project_id=#{sumProjectId} AND media_code = #{appraise.mediaType}
</foreach>
</update>
看起來並沒有什么問題，但是運行會發現報錯，錯誤信息如下
org.springframework.jdbc.BadSqlGrammarException:
### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 'UPDATE project_auto_appraise SET
artificial_valuation=201
WHERE sum_proj' at line 5
### The error may involve com.jd.dlink.dao.mapper.project.ProjectAutoAppraiseMapper.updateAutoAppraiseInfo-Inline
### The error occurred while setting parameters
### SQL: UPDATE project_auto_appraise SET artificial_valuation=? WHERE sum_project_id=? AND media_code = ? ; UPDATE project_auto_appraise SET artificial_valuation=? WHERE sum_project_id=? AND media_code = ?
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 'UPDATE project_auto_appraise SET
artificial_valuation=201
WHERE sum_proj' at line 5
; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 'UPDATE project_auto_appraise SET
artificial_valuation=201
WHERE sum_proj' at line 5
調試之后，發現只要傳一個值進去就沒有問題，就是list的成員只有一個。就想着是數據庫配置的問題
將數據庫配置修改為 jdbc.url=jdbc:mysql://127.0.0.1:3306/datebase?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&allowMultiQueries=true
新增了 &allowMultiQueries=true 意為 允許批量更新
就 ok 了