iBatis小结

<?xml version="1.0" encoding="UTF-8" ?>   
<!DOCTYPE sqlMap         
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"         
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">   
<sqlMap namespace="Account">   
  <typeAlias alias="Account" type="test.Account"/>   
  <!--列表查询,返回Account Object的List-->      
  <resultMap id="AccountResult" class="Account">   
    <result property="id" column="ID"/>   
    <result property="firstName" column="FIRST_NAME"/>   
    <result property="lastName" column="LAST_NAME"/>   
    <result property="emailAddress" column="EMAIL"/>   
  </resultMap>     
  <select id="selectAllAccounts" resultMap="AccountResult">   
    select * from ACCOUNT   
  </select>   
     
  <!--列表查询,返回HashMap的List -->    
  <!--resultMap无需再通过JDBC ResultSetMetaData 来动态获取字段信息，性能有提高-->   
  
  <resultMap id="mapResult" class="java.util.HashMap">   
    <result property="roleid" column="ROLEID"/>   
    <result property="rolename" column="ROLENAME"/>   
    <result property="id" column="ID"/>   
    <result property="firstName" column="FIRST_NAME"/>   
    <result property="lastName" column="LAST_NAME"/>   
    <result property="emailAddress" column="EMAIL"/>   
    <result property="dt" column="DT"/>   
  </resultMap>   
  <select id="selectAllAccountsWithMap" resultMap="mapResult">   
        select B.ROLEID, B.ROLENAME, A.ID, A.FIRST_NAME,A.LAST_NAME,A.EMAIL,A.DT   
        from ACCOUNT A left outer join ROLE B   on A.ROLEID = B.ROLEID   
        ORDER BY A.ID DESC   
  </select>   
     
<!--动态构造查询条件-->   
<select id="getUsers" parameterClass="user" resultMap="get-user-result">   
    Select id,name,sex from t_user   
    <dynamic prepend="WHERE">   
        <isNotEmpty prepend="AND" property="name">   
            (name like #name#)   
        </isNotEmpty>   
        <isNotEmpty prepend="AND" property="address">   
            (address like #address#)   
        </isNotEmpty>   
    </dynamic>   
</select>   
<isNotEmpty prepend="AND" property="name">   
    ( name=#name#   
        <isNotEmpty prepend="AND" property="address">   
            address=#address#   
        </isNotEmpty>   
    )   
</isNotEmpty>   
<select id="dynamicGetAccountList" resultMap="account-result" >   
    select * from ACCOUNT   
    <dynamic prepend="WHERE">   
        <isNotNull prepend="AND" property="firstName" open=”(“ close=”)”>   
            ACC_FIRST_NAME = #firstName#   
            <isNotNull prepend="OR" property="lastName">   
                ACC_LAST_NAME = #lastName#   
            </isNotNull>   
        </isNotNull>   
        <isNotNull prepend="AND" property="emailAddress">   
            ACC_EMAIL like #emailAddress#   
        </isNotNull>   
        <isGreaterThan prepend="AND" property="id" compareValue="0">   
            ACC_ID = #id#   
        </isGreaterThan>   
    </dynamic>   
    order by ACC_LAST_NAME   
</select>   
  
<isParameterPresent> <isNotParameterPresent> <isNull> <isNotNull> <isEmpty> <isNotEmpty>   
<isEqual> <isNotEqual> <isGreaterThan> <isGreaterEqual> <isLessThan> <isLessEqual>   
  
<!-- Sql片段的是用-->   
<sql id="selectItem_fragment">   
    FROM items WHERE parentid = 6  
</sql>   
<select id="selectItemCount" resultClass="int">   
    SELECT COUNT(*) AS total   
    <include refid="selectItem_fragment"/>   
</select>   
<select id="selectItems" resultClass="Item">   
    SELECT id, name   
    <include refid="selectItem_fragment"/>   
</select>   
  
<!--缓存-->   
<cacheModel id="product-cache" type="LRU">   
    <flushInterval hours="24"/>   
    <flushOnExecute statement="insertProduct"/>   
    <flushOnExecute statement="updateProduct"/>   
    <flushOnExecute statement="deleteProduct"/>   
    <property name=”size” value=”1000” />   
</cacheModel>   
<select id=”getProductList” parameterClass=”int” cacheModel=”product-cache”>   
    select * from PRODUCT where PRD_CAT_ID = #value#   
</select>   
  
<!—对XML支持 -->   
<select id="getPerson" parameterClass=”int” resultClass="xml" xmlResultName=”person”>   
    SELECT   
    PER_ID as id,   
    PER_FIRST_NAME as firstName,   
    PER_LAST_NAME as lastName,   
    PER_BIRTH_DATE as birthDate,   
    PER_WEIGHT_KG as weightInKilograms,   
    PER_HEIGHT_M as heightInMeters   
    FROM PERSON   
    WHERE PER_ID = #value#   
</select>   
<person>   
    <id>1</id>   
    <firstName>Clinton</firstName>   
    <lastName>Begin</lastName>   
    <birthDate>1900-01-01</birthDate>   
    <weightInKilograms>89</weightInKilograms>   
    <heightInMeters>1.77</heightInMeters>   
</person>   
  
<!—字符串替换   
select * from $tableName$   
Important Note 1: This support will only substitute Strings, so it is not appropriate for complex data types like Date or Timestamp.   
Important Note 2: If you use this support to alter a table name, or a column list, in an SQL select statement,then you should always specify remapResults=“true”   
-->.   
  
<!—关联查询方式，有1/N问题-->   
<sqlMap namespace="User">   
    <typeAlias alias="user" type="com.ibatis.sample.User"/>   
    <typeAlias alias="address" type="com.ibatis.sample.Address"/>   
    <resultMap id="get-user-result" class="user">   
        <result property="id" column="id"/>   
        <result property="name" column="name"/>   
        <result property="sex" column="sex"/>   
        <result property="addresses" column="id" select="User.getAddressByUserId"/>   
    </resultMap>   
    <select id="getUsers"    parameterClass="java.lang.String" resultMap="get-user-result">   
        <![CDATA[Select id,name,sex from t_user where id = #id#]]>   
    </select>   
    <select id="getAddressByUserId"  parameterClass="int" resultClass="address">   
        <![CDATA[select address,zipcode from t_address where user_id = #userid# ]]>   
    </select>   
</sqlMap>   
<resultMap id="get-user-result" class="user">   
    <result property="id" column="id"/>   
    <result property="name" column="name"/>   
    <result property="sex" column="sex"/>   
    <result property="address" column="t_address.address"/>   
    <result property="zipCode" column="t_address.zipcode"/>   
</resultMap>   
<select id="getUsers" parameterClass="java.lang.String" resultMap="get-user-result">   
    <![CDATA[select* from t_user,t_address where t_user.id=t_address.user_id]]>   
</select>   
保证User 类中包含address和zipCode两个String型属性。   
  
<!—关联查询，无1/N问题-->   
  <resultMap id="AccountResultWithRole" class="Account" groupBy="id">   
    <result property="id" column="ID"/>   
    <result property="firstName" column="FIRST_NAME"/>   
    <result property="lastName" column="LAST_NAME"/>   
    <result property="emailAddress" column="EMAIL"/>       
    <result property="role" resultMap="Account.roleResult"/>   
  </resultMap>   
  <resultMap id="roleResult" class="test.Role">   
    <result property="roleid" column="ROLEID"/>   
    <result property="rolename" column="ROLENAME"/>   
  </resultMap>   
  <select id="selectAccountByIdWithRole" parameterClass="int" resultMap="AccountResultWithRole">   
        select B.ROLEID, B.ROLENAME, A.ID, A.FIRST_NAME,A.LAST_NAME,A.EMAIL from ACCOUNT A left outer join ROLE B on A.ROLEID = B.ROLEID where A.ID = #id#   
  </select>   
     
  <!--查询-->      
  <select id="selectAccountById" parameterClass="int" resultClass="Account">   
    select ID as id,FIRST_NAME as firstName,LAST_NAME as lastName,       EMAIL as emailAddress from ACCOUNT where ID = #id#   
  </select>   
     
  <!--新增-->        
  <insert id="insertAccount" parameterClass="Account">   
    insert into ACCOUNT (FIRST_NAME,LAST_NAME,EMAIL,PID,DT)     
    values (#firstName:VARCHAR#, #lastName:VARCHAR#, #emailAddress:VARCHAR#,#pid:INTEGER:0#,#dt:TIME#)   
    <selectKey resultClass="int" type="post" keyProperty="id">   
        SELECT @@IDENTITY AS ID   
    </selectKey>       
  </insert>   
     
  <!--更新-->      
  <update id="updateAccount" parameterClass="Account">   
    update ACCOUNT set   
      FIRST_NAME = #firstName:VARCHAR#,   
      LAST_NAME = #lastName:VARCHAR#,   
      EMAIL = #emailAddress:VARCHAR#   
    where   
      ID = #id#   
  </update>   
  
  <!--删除-->   
  <delete id="deleteAccountById" parameterClass="int">   
    delete from ACCOUNT where ID = #id#   
  </delete>   
     
  <!--存储过程，如果没有返回列表，procTest的resultMap可以省略-->    
  <parameterMap id="procParamMap" class="java.util.HashMap" >   
    <parameter property="id" jdbcType="INTEGER" javaType="java.lang.Integer" mode="IN"/>   
    <parameter property="outid" jdbcType="INTEGER" javaType="java.lang.Integer" mode="OUT"/>   
    <parameter property="errMsg" jdbcType="VARCHAR" javaType="java.lang.String" mode="OUT"/>   
  </parameterMap>   
  <resultMap id="procResultMap" class="java.util.HashMap" >   
    <result property="a" column="AAA"/>   
    <result property="b" column="BBB"/>   
    <result property="c" column="CCC"/>       
  </resultMap>     
  <procedure id="procTest" parameterMap="procParamMap" resultMap="procResultMap">   
    {call test_sp_1 (?,?,?)}   
  </procedure>   
</sqlMap>