iBatis中使用动态查询
iBatis中的动态查询还是比较好用的如果想深入学习,可以参考 Manning.iBATIS.in.Action.Jan.2007
下面给出几个例子和dtd定义:
<select id="selectDispatchedKey" parameterClass="KeyAndKeyFlowInfo" resultMap="KeyAndKeyFlowResult">
select distinct
KEY_ID,
USER_ID,
INITIATOR,
INIT_DATE,
INITIATOR_EMAIL,
SGS_KEY.BRANCH_NAME,
APPROVER,
APPROVER_EMAIL,
APPROVE_DATE
from
SGS_KEY,
SGS_KEY_FLOW
where SGS_KEY.APPLY_FLOW_ID=SGS_KEY_FLOW.KEY_FLOW_ID
<dynamic prepend="and" open="(" close=")">
<isNotNull property="ki.userId" prepend="and" removeFirstPrepend="false">
USER_ID = #ki.userId#
</isNotNull>
<isNotNull property="kfi.initiator" prepend="and">
INITIATOR = #kfi.initiator#
</isNotNull>
<isNotNull property="kfi.initDate" prepend="and">
INIT_DATE = #kfi.initDate#
</isNotNull>
</dynamic>
</select>
<update id="updateKeyFlow" parameterClass="KeyFlowInfo">
update SGS_KEY_FLOW set
<dynamic>
KEY_FLOW_ID =#keyFlowId#
<isNotNull property="branchName" prepend=",">
BRANCH_NAME = #branchName#
</isNotNull>
<isNotEqual property="operation" prepend="," compareProperty="operation" compareValue="0">
OPERATION = #operation#
</isNotEqual>
<isNotNull property="initiator" prepend=",">
INITIATOR = #initiator#
</isNotNull>
<isNotNull property="initiatorEmail" prepend=",">
INITIATOR_EMAIL = #initiatorEmail#
</isNotNull>
<isNotNull property="initDate" prepend=",">
INIT_DATE = #initDate#
</isNotNull>
<isNotNull property="approver" prepend=",">
APPROVER = #approver#
</isNotNull>
<isNotNull property="approverEmail" prepend=",">
APPROVER_EMAIL = #approverEmail#
</isNotNull>
<isNotNull property="approveDate" prepend=",">
APPROVE_DATE = #approveDate#
</isNotNull>
<isNotEqual property="keyNum" prepend="," compareProperty="keyNum" compareValue="0">
KEY_NUM = #keyNum#
</isNotEqual>
<isNotNull property="applyReason" prepend=",">
APPLY_REASON = #applyReason#
</isNotNull>
<isNotNull property="rejectReason" prepend=",">
REJECT_REASON = #rejectReason#
</isNotNull>
</dynamic>
where
KEY_FLOW_ID =#keyFlowId#
</update>
0:26 2008-2-20补充:
让iBatis中的insert返回主键 [ibatis insert 返回 自增主键]
iBatis SQL-map 文件书写注意事项
http://ibatis.apache.org/dtd/sql-map-2.dtd 中有<dynamic>的定义
<!-- - - - - - - - - - - - - - - - - - - - - - - - - <br> DYNAMIC ELEMENTS <br>- - - - - - - - - - - - - - - - - - - - - - - - -->
<!ELEMENT dynamic (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST dynamic >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
>
<!ELEMENT isNotNull (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNotNull >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isNull (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNull >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isNotPropertyAvailable (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNotPropertyAvailable >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #REQUIRED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isPropertyAvailable (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isPropertyAvailable >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #REQUIRED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isEqual (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isEqual >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isNotEqual (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNotEqual >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isGreaterThan (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isGreaterThan >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isGreaterEqual (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isGreaterEqual >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isLessThan (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isLessThan >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isLessEqual (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isLessEqual >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
compareProperty CDATA #IMPLIED
compareValue CDATA #IMPLIED
>
<!ELEMENT isEmpty (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isEmpty >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isNotEmpty (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNotEmpty >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isParameterPresent (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isParameterPresent >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT isNotParameterPresent (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST isNotParameterPresent >
prepend CDATA #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
removeFirstPrepend (true|false) #IMPLIED
>
<!ELEMENT iterate (#PCDATA | include | iterate | isParameterPresent | isNotParameterPresent | isEmpty | isNotEmpty | isNotNull | isNull | isNotEqual | isEqual | isGreaterThan | isGreaterEqual | isLessThan | isLessEqual | isPropertyAvailable | isNotPropertyAvailable)*>
<!ATTLIST iterate >
prepend CDATA #IMPLIED
property CDATA #IMPLIED
removeFirstPrepend (true|false|iterate) #IMPLIED
open CDATA #IMPLIED
close CDATA #IMPLIED
conjunction CDATA #IMPLIED
>