Spring持久层(四) iBatis

最新推荐文章于 2019-07-27 15:15:00 发布

原创最新推荐文章于 2019-07-27 15:15:00 发布 · 1.3k 阅读

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#ibatis #spring #class #encoding #string #dao

本文介绍了一个使用IBATIS结合Spring框架实现数据库操作的例子。通过配置文件ibatis-context.xml，定义了数据源、SQL映射客户端等，并在IbatisProductDao中实现了产品列表的获取。测试代码展示了如何从Spring上下文中获取DAO并调用其方法。

1 配置文件 ibatis-context.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> <bean id="placeholderConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location"> <value>classpath:db.properties </value> </property> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${db.driverClassName}" /> <property name="url" value="${db.url}NIHAO" /> <property name="username" value="${db.username}" /> <property name="password" value="${db.password}" /> <property name="initialSize" value="2" /> <property name="maxActive" value="20" /> <property name="maxWait" value="-1" /> <property name="maxIdle" value="10" /> <property name="removeAbandoned" value="true" /> <property name="removeAbandonedTimeout" value="30000" /> <property name="logAbandoned" value="true" /> </bean> <bean id="sqlMapClientTemplate" class="org.springframework.orm.ibatis.SqlMapClientTemplate"> <property name="sqlMapClient" ref="sqlMapClient"></property> </bean> <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="sql-map-config.xml"></property> </bean> <bean id="ibatisProductDao" class="springapp.repository.IbatisProductDao"> <property name="sqlMapClientTemplate" ref="sqlMapClientTemplate"></property> </bean> </beans>

2 sql-map-config.xml文件内容

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

3 product-sql.xml文件内容

<?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> <resultMap id="productResult" class="springapp.domain.Product"> <result property="id" column="ID"></result> <result property="price" column="PRICE"></result> <result property="description" column="DESCRIPTION"></result> </resultMap>  <select id="getAllProduct" resultMap="productResult"> select * from PRODUCTS </select> </sqlMap>

4 IbatisProductDao.java源码

public class IbatisProductDao implements ProductDao { private SqlMapClientTemplate sqlMapClientTemplate; public void setSqlMapClientTemplate( SqlMapClientTemplate sqlMapClientTemplate) { this.sqlMapClientTemplate = sqlMapClientTemplate; } @Override public List<Product> getProductList() { return sqlMapClientTemplate.queryForList("getAllProduct"); } @Override public void saveProduct(Product prod) { } }

5 测试代码

public class IbatisProductDaoTest { static ApplicationContext ctx = new ClassPathXmlApplicationContext( new String[] { "file:src/ibatis-context.xml" }); public static void main(String[] args) { ProductDao dao = (ProductDao) ctx.getBean("ibatisProductDao"); List<Product> list = dao.getProductList(); for (Product p : list) { System.out.println(p.getDescription()); } } }