使用Spring+JDBC组合步骤
<bean id="dataSource" value="${username}"></property> <property name="password" value="${password}"></property> <!-- 连接池启动时的初始值 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池的最大值 --> <property name="maxActive" value="${maxActive}"></property> <!-- 最大空间值、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，直至减少的maxIdle为止 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 最小空间值，当空间的连接数少于阀值时，连接池就会预申请一些连接，以免洪峰来时 来不及申请 --> <property name="minIdle" value="${minIdle}"></property> </bean>
?可以把配置放到属性文件里面去 jdbc.properties
driverClassName=com.mysql.jdbc.Driverurl=jdbc\:mysql\://localhost\:3306/test?useUnicode\=true&characterEncoding\=UTF-8username=rootpassword=flyinitialSize=1maxActive=500maxIdle=2minIdle=1
?在spring容器中加入下面代码
<context:property-placeholder location="classpath:jdbc.properties"/>
二、配置事务，配置事务时，需要在xml配置文件中引入用于声明事务的tx命名空间，
事务的配置有两种：注解方式和基于XML配置方式
在这里我采用“注解方式”如：? <bean id="txManager"
? lazy-init="default"
? dependency-check="default">
? <property name="dataSource">?????????? //要求注入数据源，dataSource是我们自己定义的数据源
?? <ref bean="dataSource" />
? </property>
?</bean>
? 我们采用注解方式，
<!-- 采用@Transaction注解方式使用事务 -->
<tx:annotation-driven transaction-manager="txManager"/>?? //transaction-manager属性指定事务管理器
首先添加tx：的命名空间：红色的是tx的命名空间
<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:context="http://www.springframework.org/schema/context" 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/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"></beans>
?经过这几步的配置，我们已经配置好了spring到jdbc的集成
spring容器中的全部配置：如下:可以直接拷贝使用
<?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:context="http://www.springframework.org/schema/context" 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/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:property-placeholder location="classpath:jdbc.properties"/> <bean id="dataSource" value="${username}"></property> <property name="password" value="${password}"></property> <!-- 连接池启动时的初始值 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池的最大值 --> <property name="maxActive" value="${maxActive}"></property> <!-- 最大空间值、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，直至减少的maxIdle为止 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 最小空间值，当空间的连接数少于阀值时，连接池就会预申请一些连接，以免洪峰来时 来不及申请 --> <property name="minIdle" value="${minIdle}"></property> </bean> <bean id="txManager" lazy-init="default" dependency-check="default"> <property name="dataSource"> <ref bean="dataSource" /> </property> </bean> <tx:annotation-driven transaction-manager="txManager"/> <bean id="personService" ref="dataSource" /> </bean></beans>?三、接下来，建表，编写业务逻辑，增删查改
建表：表名：person
????????? 字段：id Intege? primary key? autoincrment 自增
????????? 字段：name varchar（20）
首先：定义接口：PersionService
package com.xt.service;import java.util.List;import com.xt.bean.Person;public interface PersonService { public void save(Person person); public void update(Person person); public Person getPerson(Integer personid); public List<Person> getPersons(); public void delete(Integer personid); }?
建立bean类 ：Personpackage com.xt.bean;public class Person { public Integer id; public String name; public Person(){}; public Person(String name) { this.name=name; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }}给PersonService接口，创建实现类PersonServiceBeanpackage com.xt.service.impl;import java.util.List;import javax.sql.DataSource;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.transaction.annotation.Transactional;import com.xt.bean.Person;import com.xt.service.PersonService;@Transactionalpublic class PersonServiceBean implements PersonService { private JdbcTemplate jdbcTemplate; //我们使用spring提供的JdbcTemplate类进行管理， public void setDataSource(DataSource dataSource) { this.jdbcTemplate = new JdbcTemplate(dataSource); } @Transactional(rollbackFor=Exception.class) public void delete(Integer personid) { jdbcTemplate.update("delete from person where id=?", new Object[]{personid}, new int[]{java.sql.Types.INTEGER}); } public Person getPerson(Integer personid) { return (Person)jdbcTemplate.queryForObject("select *from person where id=?", new Object[]{personid}, new PersonRowMapper()); } @SuppressWarnings("unchecked") public List<Person> getPersons() { return (List<Person>)jdbcTemplate.query("select * from person", new PersonRowMapper()); } public void save(Person person) { jdbcTemplate.update("insert into person(name) values(?)", new Object[]{person.getName()}, new int[]{java.sql.Types.VARCHAR}); } public void update(Person person) { jdbcTemplate.update("update person set name=? where id=?", new Object[]{person.getName()}, new int[]{java.sql.Types.VARCHAR,java.sql.Types.INTEGER}); }}还需要一个回调接口PersonRowMapperpackage com.xt.service.impl;import java.sql.ResultSet;import java.sql.SQLException;import org.springframework.jdbc.core.RowMapper;import com.xt.bean.Person;public class PersonRowMapper implements RowMapper { public Object mapRow(ResultSet rs, int index) throws SQLException { Person person = new Person(rs.getString("name")); person.setId(rs.getInt("id")); return person; }}把PersonServiceBean交给spring，把下面的代码加到spring容器管理 <bean id="personService" ref="dataSource" /> //获取数据源 </bean>然后，我们来进行测试建立一个单元测试package junit.test;import org.junit.BeforeClass;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.xt.bean.Person;import com.xt.service.PersonService;public class PersonServiceBeanTest { private static PersonService personService; @BeforeClass public static void setUpBeforeClass() throws Exception { ApplicationContext cxt = new ClassPathXmlApplicationContext( "/applicationContext.xml"); personService = (PersonService) cxt.getBean("personService"); } @Test public void save() { for (int i = 0; i < 5; i++) { personService.save(new Person("众志成城" + i)); } } @Test public void update() { Person person = personService.getPerson(1); person.setName("我是大好人"); System.out.println(person.getName()); } @Test public void getPerson() { Person person = personService.getPerson(1); System.out.println(person.getName()); } @Test public void delete() { personService.delete(2); } @Test public void getBeans() { for (Person p : personService.getPersons()) System.out.println(p.getId() + " = " + p.getName()); }}?