語法格式

<trim prefix="" suffix="" suffixOverrides="" prefixOverrides=""></trim>

語法說明
prefix:在trim標簽內sql語句加上前綴
suffix:在trim標簽內sql語句加上后綴

suffixOverrides:指定去除多余的后綴內容
比如：suffixOverrides=”,”，去除trim標簽內sql語句多余的后綴”,”
prefixOverrides:指定去除多余的前綴內容

示例代碼

<insert id="insertSelective" keyColumn="ID" keyProperty="id" parameterType="cn.com.hwasunsoft.lims.biz.model.CompanyInfo" useGeneratedKeys="true"><selectKey keyProperty="id" resultType="long" order="BEFORE">select SEQ_SYS_COMPANY_INFO.nextval from dual </selectKey>insert into SYS_COMPANY_INFO <trim prefix="(" suffix=")" suffixOverrides=",">ID,<if test="no != null">NO,</if><if test="name != null">NAME,</if><if test="postCode != null">POST_CODE,</if><if test="contactPhone != null">CONTACT_PHONE,</if><if test="orderPhone != null">ORDER_PHONE,</if><if test="recordStatus != null">RECORD_STATUS,</if><if test="createTime != null">CREATE_TIME,</if><if test="modifyTime != null">MODIFY_TIME,</if> </trim> <trim prefix="values (" suffix=")" suffixOverrides=",">#{id},<if test="no != null">#{no,jdbcType=VARCHAR},</if><if test="name != null">#{name,jdbcType=VARCHAR},</if><if test="postCode != null">#{postCode,jdbcType=VARCHAR},</if><if test="contactPhone != null">#{contactPhone,jdbcType=VARCHAR},</if><if test="orderPhone != null">#{orderPhone,jdbcType=VARCHAR},</if><if test="recordStatus != null">#{recordStatus,jdbcType=DECIMAL},</if><if test="createTime != null">#{createTime,jdbcType=TIMESTAMP},</if><if test="modifyTime != null">#{modifyTime,jdbcType=TIMESTAMP},</if> </trim> </insert>

如果，沒有suffixOverrides=”,”，SQL是錯誤的
insert into cart (id,user_id,deal_id,) values(1,2,1,);

應為
insert into cart (id,user_id,deal_id) values(1,2,1);

總結

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