iBatis动态SQL标签用法

1、动态SQL片段

通过SQL片段达到代码复用

        <!-- 动态条件分页查询 -->
        < sql id ="sql_count" >
                select count(*)
        </ sql >
        < sql id ="sql_select" >
                select *
        </ sql >
        < sql id ="sql_where" >
                from icp
                < dynamic prepend ="where" >
                        < isNotEmpty prepend ="and" property ="name" >
                                name like '%$name$%'
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="path" >
                                path like '%path$%'
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="area_id" >
                                area_id = #area_id#
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="hided" >
                                hided = #hided#
                        </ isNotEmpty >
                </ dynamic >
                < dynamic prepend="">
                        < isNotNull property ="_start" >
                                < isNotNull property ="_size" >
                                        limit #_start#, #_size#
                                </ isNotNull >
                        </ isNotNull >
                </ dynamic >
        </ sql >
        < select id ="findByParamsForCount" parameterClass ="map" resultClass ="int" >
                < include refid ="sql_count" />
                < include refid ="sql_where" />
        </ select >
        < select id ="findByParams" parameterClass ="map" resultMap ="icp.result_base" >
                < include refid ="sql_select" />
                < include refid ="sql_where" />
        </ select >

 

2、数字范围查询

所传参数名称是捏造所得，非数据库字段，比如_img_size_ge、_img_size_lt字段

                        < isNotEmpty prepend ="and" property ="_img_size_ge" >
                                <![CDATA[
                                img_size >= #_img_size_ge#
                        ]]>
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="_img_size_lt" >
                                <![CDATA[
                                img_size < #_img_size_lt#
                        ]]>
                        </ isNotEmpty >

 

多次使用一个参数也是允许的

                        < isNotEmpty prepend ="and" property ="_now" >
                                <![CDATA[
                                            execplantime >= #_now#
                                     ]]>
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="_now" >
                                <![CDATA[
                                            closeplantime < = #_now#
                                     ]]>
                        </ isNotEmpty >

 

3、时间范围查询

                        < isNotEmpty prepend ="" property=" _starttime">
                                < isNotEmpty prepend ="and" property ="_endtime" >
                                        <![CDATA[
                                        createtime >= #_starttime#
                                        and createtime < #_endtime#
                                 ]]>
                                </ isNotEmpty >
                        </ isNotEmpty >

 

4、in查询

                        < isNotEmpty prepend ="and" property ="_in_state" >
                                state in ('$_in_state$')
                        </ isNotEmpty >

 

5、like查询

                        < isNotEmpty prepend ="and" property ="chnameone" >
                                (chnameone like '%$chnameone$%' or spellinitial like '%$chnameone$%')
                        </ isNotEmpty >
                        < isNotEmpty prepend ="and" property ="chnametwo" >
                                chnametwo like '%$chnametwo$%'
                        </ isNotEmpty >

 

6、or条件

                        < isEqual prepend ="and" property ="_exeable" compareValue ="N" >
                                <![CDATA[
                                (t.finished='11'    or t.failure=3)
                        ]]>
                        </ isEqual >

 

                        < isEqual prepend ="and" property ="_exeable" compareValue ="Y" >
                                <![CDATA[
                                t.finished in ('10','19') and t.failure< 3
                        ]]>
                        </ isEqual >

 

7、where子查询

                        < isNotEmpty prepend ="" property=" exprogramcode">
                                < isNotEmpty prepend ="" property=" isRational">
                                        < isEqual prepend ="and" property ="isRational" compareValue ="N" >
                                                code not in
                                                (select t.contentcode
                                                from cms_ccm_programcontent t
                                                where t.contenttype='MZNRLX_MA'
                                                and t.programcode = #exprogramcode#)
                                        </ isEqual >
                                </ isNotEmpty >
                        </ isNotEmpty >

 

        < select id ="findByProgramcode" parameterClass ="string" resultMap ="cms_ccm_material.result" >
                select *
                from cms_ccm_material
                where code in
                (select t.contentcode
                from cms_ccm_programcontent t
                where t.contenttype = 'MZNRLX_MA'
                and programcode = #value#)
                order by updatetime desc
        </ select >

 

9、函数的使用

        <!-- 添加 -->
        < insert id ="insert" parameterClass ="RuleMaster" >
                insert into rulemaster(
                name,
                createtime,
                updatetime,
                remark
                ) values (
                #name#,
                now(),
                now(),
                #remark#
                )
                < selectKey keyProperty ="id" resultClass ="long" >
                        select LAST_INSERT_ID()
                </ selectKey >
        </ insert >
        <!-- 更新 -->
        < update id ="update" parameterClass ="RuleMaster" >
                update rulemaster set
                name = #name#,
                updatetime = now(),
                remark = #remark#
                where id = #id#
        </ update >

 

10、map结果集

        <!-- 动态条件分页查询 -->
        < sql id ="sql_count" >
                select count(a.*)
        </ sql >
        < sql id ="sql_select" >
                select a.id                vid,
                a.img             imgurl,
                a.img_s         imgfile,
                b.vfilename vfilename,
    b.name            name,
                c.id                sid,
                c.url             url,
                c.filename    filename,
                c.status        status
        </ sql >
        < sql id ="sql_where" >
                From secfiles c, juji b, videoinfo a
                where
                a.id = b. videoid
                and b.id = c.segmentid
                and c.status = 0
                order by a.id asc,b.id asc,c.sortnum asc
                < dynamic prepend="">
                        < isNotNull property ="_start" >
                                < isNotNull property ="_size" >
                                        limit #_start#, #_size#
                                </ isNotNull >
                        </ isNotNull >
                </ dynamic >
        </ sql >
        <!-- 返回没有下载的记录总数 -->
        < select id ="getUndownFilesForCount" parameterClass ="map" resultClass ="int" >
                < include refid ="sql_count" />
                < include refid ="sql_where" />
        </ select >
        <!-- 返回没有下载的记录 -->
        < select id ="getUndownFiles" parameterClass ="map" resultClass ="java.util.HashMap" >
                < include refid ="sql_select" />
                < include refid ="sql_where" />
        </ select >