iBatis学习小结

sqlMap文件

<?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>

java 代码

public class TestDao extends SqlMapClientDaoSupport {
	public List selectAllAccounts() throws SQLException {
		return getSqlMapClientTemplate().queryForList("selectAllAccounts");
	}

	public List selectAllAccountsWithMap() throws SQLException {
		return getSqlMapClientTemplate().queryForList(
				"selectAllAccountsWithMap");
	}	
	
	public Account selectAccountById(int id) throws SQLException {
		return (Account) getSqlMapClientTemplate().queryForObject(
				"selectAccountById", new Integer(id));
	}
	public List procTest(Map params) throws Exception {
		List ret = (List) getSqlMapClientTemplate().queryForList("procTest",params);
		return ret;
	}
	public Account selectAccountByIdWithRole(int id) throws SQLException {
		return (Account) getSqlMapClientTemplate().queryForObject(
				"selectAccountByIdWithRole", new Integer(id));
	}	
	
	public void insertAccount(Account account) throws SQLException {
		getSqlMapClientTemplate().insert("insertAccount", account);
	}

	public int updateAccount(Account account) throws SQLException {
		return getSqlMapClientTemplate().update("updateAccount", account);
	}

	public int deleteAccount(int id) throws SQLException {
		return getSqlMapClientTemplate().delete("deleteAccountById", new Integer(id));
	}
}

SqlServer存储过程

CREATE procedure test_sp_1 @id int,@outid int output,@errMsg varchar(255) output

AS

update ACCOUNT set pid=@id
select @outid=isnull(@id,0)+1
select @errMsg='测试'
select AAA='AAAAAAA',BBB='BBBBBBB',CCC='CCCCCCC'
GO

http://www.iteye.com/topic/68962

不错，我收藏了。

<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> 

这段运行出来的sql语句是(name is "qwrt", address is null)：
  １． select id ,name,sex from t_user where name like 'qwrt'
还是：
  ２． select id ,name,sex from t_user where name like '%qwrt%'
如果是１，那要怎么样变成像2这种构sql语句。

  

<isNotEmpty prepend="AND" property="name">
(name like '%$name$%')
</isNotEmpty>

谢谢楼上的,这里人气真旺

跟官方参考文档差不多的

不过还是感谢楼主的辛苦劳动，为初学者提供了便利

是差不多,我也是刚刚涉足,谈不上什么深刻的理解,尤其缓存/懒装入策略方面还差的很多,上面涉及的内容只是入门而已.

selectKey只有调用sqlMapClient.insert的时候才有效,
调用sqlMapClient.update的时候不会产生任何错误,但是ibatis不会为持久对象生成key.

请问lz,　我的存储过程是oracle的，　我就想得到两个out输出参数的值，　如何取得？
能给个详细说明吗？