spring3.2.2+mybatis3.2.3+c3p0项目整合

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内部邀请码：C8E245J （不写邀请码，没有现金送）
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在搭建项目之前，创建数据库，以及数据库表，我用的数据库是mysql 5.6.11

创建数据库语句为：

CREATE TABLE `orders` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`company_id` varchar(255) DEFAULT NULL,
`charge` decimal(18,4) NOT NULL DEFAULT '0.0000',
`state` int(11) DEFAULT '0',
`remark` varchar(500) DEFAULT NULL,
PRIMARY KEY (`id`)
);

搭建项目需要以下的包，

mybatis-3.2.3-SNAPSHOT.jar

mybatis-spring-1.2.0.jar

mysql-connector-java-5.1.24-bin.jar

c3p0-0.9.1.2.jar

commons-logging-1.1.1.jar

spring-aop-3.2.2.RELEASE.jar

spring-aspects-3.2.2.RELEASE.jar

spring-beans-3.2.2.RELEASE.jar

spring-context-3.2.2.RELEASE.jar

spring-context-support-3.2.2.RELEASE.jar

spring-core-3.2.2.RELEASE.jar

spring-expression-3.2.2.RELEASE.jar

spring-jdbc-3.2.2.RELEASE.jar

spring-tx-3.2.2.RELEASE.jar

好了，简单的准备工作已经准备就绪，现在来创建一个java项目或者java web项目

首先，创建dao接口类。

package com.yunix.dao;
public interface IOrderDao {
public int getOrderCount();
}

然后在com.yunix.dao.impl包下创建OrderDaoMapper.xml

内容为：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC
"-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.yunix.dao.IOrderDao">
<select id="getOrderCount" resultType="int">
<![CDATA[
select count(1) from orders
]]>
</select>
</mapper>

其中namespace为dao接口，id为dao接口中的方法。

创建service接口：

package com.yunix.service;
public interface IOrderService {
public int getOrderCount();
}

创建service实现类：

package com.yunix.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.yunix.dao.IOrderDao;
import com.yunix.service.IOrderService;
@Service
public class OrderService implements IOrderService {
@Autowired
private IOrderDao orderDao;
@Override
public int getOrderCount() {
return orderDao.getOrderCount();
}
}

在src文件夹下创建applicationCntext.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
default-autowire="byName"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://192.168.1.5:3306/test" />
<property name="user" value="yunix" />
<property name="password" value="123456" />
<property name="initialPoolSize" value="1" />
<property name="minPoolSize" value="0" />
<property name="maxPoolSize" value="10" />
<property name="acquireIncrement" value="5" />
<property name="maxIdleTime" value="10" />
<property name="maxStatements" value="0" />
</bean>
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations"
value="classpath*:com/yunix/dao/impl/*Mapper.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.yunix.dao" />
</bean>
<context:component-scan base-package="com.yunix.service" />
</beans>

以及log4j.properties

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] -%m%n
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug,stdout

至此，项目搭建完成。

到底搭建成不成功，写一个测试类进行简单测试一下。我写的比较简单，写了个main方法进行了测试，测试代码如下：

package test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.yunix.service.IOrderService;
public class MyBatisTest {
public static void main(String[] args) {
@SuppressWarnings("resource")
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
IOrderService orderService = (IOrderService)context.getBean("orderService");
int count = orderService.getOrderCount();
System.out.println("count:" + count);
}
}

运行结果为：