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()); }}

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