spring与jdbc的结合使用

利用spring可以解决事务处理时的许多问题，同spring实现其他的功能相似，spring提供了两种不同的方式实现与jdbc的结合，两种方式是注解和xml配置方式。

1.   spring和jdbc的结合

1）       建立PersonService接口：

public interface PersonService {    /**     * 保存Person对象     *     * @param person     */    public void save(Person person);     /**     * 得到person对象     *     * @param personId     */    public Person getPerson(Integer personId);    /**     * 得到所有的Person     * @return     */    public List<Person> getPersons();     /**     * 更新person     *     * @param person     */    public void update(Person person);     /**     * 删除person     */    public void delete(Integer id); }

2）       编写接口的实现类，并且将该bean纳入到spring的事务管理中（通过注解方式）：

@Transactionalpublic class PersonServiceBean implements PersonService {    private JdbcTemplate jdbcTemplate;     public void setDataSource(DataSource dataSource) {       this.jdbcTemplate = new JdbcTemplate(dataSource);    }     @Override    public void delete(Integer id) {       jdbcTemplate.update("delete fromperson where id=?", new Object[] { id },              new int[] { java.sql.Types.INTEGER });       jdbcTemplate.update("delete frompersonsss where id=2", new Object[] { id },              new int[] { java.sql.Types.INTEGER });    }     @Override    public Person getPerson(Integer personId) {        return (Person) jdbcTemplate.queryForObject(              "select *from person where id=?", new Object[] {personId },              new PersonRowMapper());    }     @Transactional(propagation =Propagation.NOT_SUPPORTED)    @Override    public List<Person> getPersons() {        return (List<Person>) jdbcTemplate.query("select * from person",              new PersonRowMapper());    }     @Override    public void save(Person person) {        jdbcTemplate.update("insert intoperson(name) values(?)",              new Object[] { person.getName() },              new int[] { java.sql.Types.VARCHAR });    }     @Override    public void update(Person person) {       jdbcTemplate.update("updateperson set name=? where id=?",              new Object[] { person.getName(), person.getId() }, new int[] {                     java.sql.Types.VARCHAR, java.sql.Types.INTEGER });     } }

3）       注意在bean.xml中的配置：

<?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:context="http://www.springframework.org/schema/context"    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-2.5.xsd          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd          http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.5.xsd          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">     <context:property-placeholder location="classpath:jdbc.properties" />    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"       destroy-method="close">       <property name="driverClassName"value="${driverClassName}" />       <property name="url"value="${url}" />       <property name="username"value="${username}" />       <property name="password"value="${password}" />       <!-- 连接池启动时的初始值 -->       <property name="initialSize"value="${initialSize}" />       <!-- 连接池的最大值 -->       <property name="maxActive"value="${maxActive}" />       <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->       <property name="maxIdle"value="${maxIdle}" />       <!--  最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->       <property name="minIdle"value="${minIdle}" />    </bean>     <bean id="txManager"       class="org.springframework.jdbc.datasource.DataSourceTransactionManager">       <property name="dataSource"ref="dataSource" />    </bean>        <tx:annotation-driven transaction-manager="txManager"/>     <bean id="personService" class="com.lcq.service.impl.PersonServiceBean">       <property name="dataSource"ref="dataSource" />    </bean></beans>

4）       编写测试类：

public class PersonServiceTest {     private static PersonService personService;     @BeforeClass    public static void setUpBeforeClass() throws Exception {        try {           ApplicationContext cxt = new ClassPathXmlApplicationContext(                  "beans.xml");           personService = (PersonService) cxt.getBean("personService");       } catch (Exception e) {           e.printStackTrace();       }     }     @Test    public void save() {       personService.save(new Person("张三"));     }     @Test    public void getPerson() {       System.out.println(personService.getPerson(1).getName());    }     @Test    public void update() {       Person person = personService.getPerson(1);       person.setName("name");       personService.update(person);    }     @Test    public void del(){       personService.delete(1);     }    @Test    public void getPersons(){       for(Person person:personService.getPersons())           System.out.println(person.getName());    }                        }使用xml的配置方式实现spring与jdbc的结合使用，在bean.xml中的关键配置：<aop:config>       <aop:pointcut id="transactionPointcut"           expression="execution(* com.lcq.service..*.*(..))"/>       <aop:advisor advice-ref="txAdvice"pointcut-ref="transactionPointcut" />    </aop:config>    <tx:advice id="txAdvice" transaction-manager="txManager">       <tx:attributes>           <tx:method name="get*"read-only="true" propagation="NOT_SUPPORTED"/>           <tx:method name="*"/>       </tx:attributes></tx:advice>