iBATIS SQLMap配置Demo浅析

 

在Spring的jpestore中，数据持久层用到了iBATIS SQLMaps，这里写一个iBATIS的简单Demo，作为iBATIS的学习笔记。

iBATIS的SQLMap配置文件是XML形式，一般叫SqlMapConfig.xml，如下：

Xml代码

﹤?xml version="1.0" encoding="UTF-8"?﹥
﹤!DOCTYPE sqlMapConfig  PUBLIC "-//iBATIS.com//DTD SQL Map
Config 2.0/" "http://www.ibatis.com/dtd/sql-map-config-2.dtd"﹥

﹤sqlMapConfig﹥
    ﹤!--settings配置是可选的，用来控制sqlMapping的详细配置，
主要是事务处理。参数具体含义请参考ibatis开发指南--﹥
    ﹤settings cacheModelsEnabled="true" enhancementEnabled="true"
        lazyLoadingEnabled="true" errorTracingEnabled="true" maxRequests="32"
        maxSessions="10" maxTransactions="5" useStatementNamespaces="false" /﹥
    ﹤!--使用SimpleDataSource配置数据源，DataSource的iBATIS实现：
SimpleDataSource类，Jakarta DBCP（Commons），
和可通过JNDI上下文查找的DataSource（即应用服务器中的DataSource）--﹥
    ﹤transactionManager type="JDBC"﹥

        ﹤dataSource type="SIMPLE"﹥
            ﹤property name="JDBC.Driver"
value="com.mysql.jdbc.Driver" /﹥
            ﹤property name="JDBC.ConnectionURL"
value="jdbc:mysql://127.0.0.1:3306/jpetstore?" /﹥
            ﹤property name="JDBC.Username" value="root" /﹥
            ﹤property name="JDBC.Password" value="" /﹥
            ﹤property name="Pool.MaximumActiveConnections" value="10" /﹥
            ﹤property name="Pool.MaximumIdleConnections" value="5" /﹥
            ﹤property name="Pool.MaximumCheckoutTime" value="120000" /﹥
            ﹤property name="Pool.TimeToWait" value="500" /﹥
            ﹤property name="Pool.PingQuery" value="select 1 from ACCOUNT" /﹥
            ﹤property name="Pool.PingEnabled" value="false" /﹥
            ﹤property name="Pool.PingConnectionsOlderThan" value="1" /﹥
            ﹤property name="Pool.PingConnectionsNotUsedFor" value="1" /﹥
        ﹤/dataSource﹥
    ﹤/transactionManager﹥
    ﹤!--引入所有的SQL Map配置文件，这里的路径是classpath的相对路径，
例如下面的配置说明引入Account.xml，位置在com/quqworld/test/ibatis包内--﹥
    ﹤sqlMap resource="com/quqworld/test/ibatis/Account.xml" /﹥

﹤/sqlMapConfig﹥

接下来是iBATIS SQLMap映射文件Account.xml：

Xml代码

﹤?xml version="1.0" encoding="UTF-8"?﹥
﹤!DOCTYPE sqlMap PUBLIC "-//iBATIS.com//DTD SQL Map 2.0//EN"
    "http://www.ibatis.com/dtd/sql-map-2.dtd"﹥

﹤sqlMap namespace="Account"﹥
    ﹤!--在SQL Map框架中，Result Map是极其重要的组件。
在执行查询Mapped Statement时，resultMap负责将结果集的列值映射成Java Bean的属性值。--﹥
    ﹤resultMap id="result"
        class="org.springframework.samples.jpetstore.domain.Account"﹥
        ﹤result property="username" column="userid" columnIndex="1" /﹥
        ﹤result property="email" column="email" columnIndex="2" /﹥
        ﹤result property="firstName" column="firstname" columnIndex="3" /﹥
        ﹤result property="lastName" column="lastname" columnIndex="4" /﹥
        ﹤result property="status" column="status" columnIndex="5" /﹥
        ﹤result property="address1" column="addr1" columnIndex="6" /﹥
        ﹤result property="address2" column="addr2" columnIndex="7" /﹥
        ﹤result property="city" column="city" columnIndex="8" /﹥
        ﹤result property="state" column="state" columnIndex="9" /﹥
        ﹤result property="zip" column="zip" columnIndex="10" /﹥
        ﹤result property="country" column="country" columnIndex="11" /﹥
        ﹤result property="phone" column="phone" columnIndex="12" /﹥﹤/resultMap﹥

    ﹤select id="getAllAccountByUserid" resultMap="result"﹥
        select
            account.userid,
            account.email,
            account.firstname,
            account.lastname,
            account.status,
            account.addr1,
            account.addr2,
            account.city,
            account.state,
            account.zip,
            account.country,
            account.phone
            from account
            where account.userid=#value#
    ﹤/select﹥
﹤/sqlMap﹥

下面是iBATIS SQLMap的Java代码：

Java代码

try {
        String resource = "com/quqworld/test/ibatis/SqlMapConfig.xml";
        Reader reader = Resources.getResourceAsReader(resource);

        SqlMapClient sqlMap = SqlMapClientBuilder.buildSqlMapClient(reader);
        Object object =  sqlMap.queryForObject(
                "getAllAccountByUserid", "ACID",new Account());
        System.out.println("select result: " +object);

    } catch (Exception e) {
        e.printStackTrace();
    }

iBATIS SQLMap的配置Demo就向你介绍到这里，希望对你有所帮助。

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http://developer.51cto.com/art/200907/138627.htm