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
<dynamicprepend="and" open="(" close=")">
<isNotNull property="ki.userId" prepend="and" removeFirstPrepend="false">
USER_ID = #ki.userId#
</isNotNull>
<isNotNullproperty="kfi.initiator" prepend="and">
INITIATOR = #kfi.initiator#
</isNotNull>
<isNotNullproperty="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>
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属性关键字
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含义
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<isEqual>
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如果参数相等于值
则查询条件有效。
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<isNotEqual>
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如果参数不等于值则查询条件有效。
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<isGreaterThan>
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如果参数大于值则查询条件有效。
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<isGreaterEqual>
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如果参数等于值则查询条件有效。
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<isLessEqual>
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如果参数小于值则查询条件有效。如下所示：
<isLessEqual prepend = ”AND” property = ”age” compareValue = ”18” >
ADOLESCENT = ‘TRUE’
</isLessEqual>
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<isPropertyAvailable>
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如果参数有使用则查询条件有效。
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<isNotPropertyAvailable>
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如果参数没有使用则查询条件有效。
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<isNull>
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如果参数为NULL则查询条件有效。
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<isNotNull>
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如果参数不为NULL则查询条件有效。
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<isEmpty>
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如果参数为空则查询条件有效。
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<isNotEmpty>
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如果参数不为空则查询条件有效
。参数的数据类型为
Collection
、
String
时参数不为
NULL
或“”。如下所示：
<isNotEmpty prepend=”AND” property=”firstName” >
FIRST_NAME=#firstName#
</isNotEmpty>
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<isParameterPresent>
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如果参数类不为NULL
则查询条件有效。
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<isNotParameterPresent>
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Checks to see if the parameter object is not present (null). Example Usage:
<isNotParameterPresent prepend=”AND”>
EMPLOYEE_TYPE = ‘DEFAULT’
</isNotParameterPresent>
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http://203.208.39.132/search?q=cache:c0ebNIxuwRsJ:blog.csdn.net/yangguoqi/archive/2009/04/25/4122824.aspx+isNotNull+removeFirstPrepend&cd=4&hl=zh-CN&ct=clnk&gl=cn&st_usg=ALhdy292qjrM9JyeUS1SW1kaFKLSpEs4-w
项目的例子：
<statement id="[customerinfo-lookup]" parameterClass="java.util.Map" resultClass="java.util.HashMap">
<![CDATA[
SELECT A.ROW_ID s_CUSTOMER_ID,A.PERMIT_NO s_PERMIT_NO,A.CUSTOMER_DESC s_CUSTOMER_DESC,A.ADDR s_ADDR,
A.CUSTMGR_ID s_CUSTMGR_ID,B.EMPLOYEE_NAME s_CUSTMGR_NAME,A.MARKET_ORG s_MARKET_ORG,C.DEPT_NAME s_DEPT_NAME
FROM MD_CUSTOMER A LEFT JOIN MD_EMPLOYEE B ON A.CUSTMGR_ID=B.ROW_ID LEFT JOIN MD_DEPT C ON A.MARKET_ORG=C.ROW_ID
WHERE 1=1 AND A.STATUS='1'
]]>
<isNotEmpty prepend="and" property="custmgrID">
<![CDATA[ A.CUSTMGR_ID=#custmgrID# ]]>
</isNotEmpty>
<isNotNull property="filter" removeFirstPrepend="true" prepend="AND" open="(" close=")">
<isNotEmpty prepend="OR" property="filter.m_PERMIT_NO">
<![CDATA[ A.PERMIT_NO LIKE '%$filter.m_PERMIT_NO$%' ]]>
</isNotEmpty>
<isNotEmpty prepend="OR" property="filter.m_CUSTOMER_DESC">
<![CDATA[ A.CUSTOMER_DESC LIKE '%$filter.m_CUSTOMER_DESC$%' ]]>
</isNotEmpty>
<isNotEmpty prepend="OR" property="filter.s_PLACE_NAME">
<![CDATA[ A.ADDR LIKE '%$filter.m_ADDR$%' ]]>
</isNotEmpty>
</isNotNull>
<isNotNull prepend="ORDER BY" property="sort"> <!--排序-->
$sort$
</isNotNull>
</statement>