spring3.2.2+mybatis3.2.3+c3p0项目整合

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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：

count:11