搭建Spring + SpringMVC + Mybatis框架之二（整合Spring和Mybatis）

整合Spring和Mybatis

首先给出完整的项目目录：

(1)引入项目需要的jar包

使用http://maven.apache.org作为中央仓库即可。
Spring核心包，mybatis核心包，json数据需要的包【经常需要用到】，log4j日志管理包。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>springDemo</groupId>
  <artifactId>springDemo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>springDemo</name>
  <url>http://maven.apache.org</url>
  
  <description>搭建Spring+SpringMVC+mybatis开发环境</description>
  
  <properties>
	  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	  <!-- spring版本号 -->  
	  <spring.version>3.2.4.RELEASE</spring.version>  
	  <org.aspectj.version>1.7.3</org.aspectj.version>  
	  <!-- mybatis版本号 -->  
	  <mybatis.version>3.2.4</mybatis.version>  
	  <!-- log4j日志文件管理包版本 -->  
	  <slf4j.version>1.6.6</slf4j.version>  
	  <log4j.version>1.2.12</log4j.version>  
  </properties>
  
  <dependencies>  
       <!-- spring核心包 -->  
       <!-- springframe start -->  
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-core</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-web</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-oxm</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-tx</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-jdbc</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-webmvc</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-aop</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-context-support</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.springframework</groupId>  
           <artifactId>spring-test</artifactId>  
           <version>${spring.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.aspectj</groupId>  
           <artifactId>aspectjweaver</artifactId>  
           <version>${org.aspectj.version}</version>  
       </dependency>  
       <dependency>  
           <groupId>org.aspectj</groupId>  
           <artifactId>aspectjrt</artifactId>  
           <version>${org.aspectj.version}</version>  
       </dependency>  
 
       <dependency>  
           <groupId>cglib</groupId>  
           <artifactId>cglib</artifactId>  
           <version>2.2.2</version>  
       </dependency>  
       <dependency>  
           <groupId>cglib</groupId>  
           <artifactId>cglib-nodep</artifactId>  
           <version>2.2.2</version>  
       </dependency>  
       <!-- springframe end -->  
 
       <!-- mybatis核心包 -->  
       <dependency>  
           <groupId>org.mybatis</groupId>  
           <artifactId>mybatis</artifactId>  
           <version>${mybatis.version}</version>  
       </dependency>  
       <!-- mybatis/spring包 -->  
       <dependency>  
           <groupId>org.mybatis</groupId>  
           <artifactId>mybatis-spring</artifactId>  
           <version>1.2.2</version>  
       </dependency>  
       <!-- mysql驱动包 -->  
       <dependency>  
           <groupId>mysql</groupId>  
           <artifactId>mysql-connector-java</artifactId>  
           <version>5.1.29</version>  
       </dependency>  
       <!-- junit测试包 -->  
       <dependency>  
           <groupId>junit</groupId>  
           <artifactId>junit</artifactId>  
           <version>4.11</version>  
           <scope>test</scope>  
       </dependency>  
       <!-- 阿里巴巴数据源包 -->  
       <dependency>  
           <groupId>com.alibaba</groupId>  
           <artifactId>druid</artifactId>  
           <version>1.0.2</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.apache.commons</groupId>  
           <artifactId>commons-lang3</artifactId>  
           <version>3.1</version>  
       </dependency>  
 
       <dependency>  
           <groupId>commons-dbcp</groupId>  
           <artifactId>commons-dbcp</artifactId>  
           <version>1.4</version>  
       </dependency>  
 
       <!-- json数据 -->  
       <dependency>  
           <groupId>org.codehaus.jackson</groupId>  
           <artifactId>jackson-mapper-asl</artifactId>  
           <version>1.9.13</version>  
       </dependency>  
 
       <dependency>  
           <groupId>commons-lang</groupId>  
           <artifactId>commons-lang</artifactId>  
           <version>2.6</version>  
       </dependency>  
 
       <dependency>  
           <groupId>javax.servlet</groupId>  
           <artifactId>jstl</artifactId>  
           <version>1.2</version>  
       </dependency>  
       <dependency>  
           <groupId>javax.servlet</groupId>  
           <artifactId>servlet-api</artifactId>  
           <version>2.5</version>  
       </dependency>  
 
       <dependency>  
           <groupId>org.apache.velocity</groupId>  
           <artifactId>velocity</artifactId>  
           <version>1.7</version>  
       </dependency>  
       <dependency>  
           <groupId>org.apache.velocity</groupId>  
           <artifactId>velocity-tools</artifactId>  
           <version>2.0</version>  
       </dependency>  
 
       <!-- 日志文件管理包 -->  
       <!-- log start -->  
       <dependency>  
           <groupId>log4j</groupId>  
           <artifactId>log4j</artifactId>  
           <version>${log4j.version}</version>  
       </dependency>  
       <dependency>  
           <groupId>org.slf4j</groupId>  
           <artifactId>slf4j-api</artifactId>  
           <version>${slf4j.version}</version>  
       </dependency>  
       <dependency>  
           <groupId>org.slf4j</groupId>  
           <artifactId>slf4j-log4j12</artifactId>  
           <version>${slf4j.version}</version>  
       </dependency>  
       <!-- log end -->  
   </dependencies>
  
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

（2）配置spring-mybatis.xml文件

该文件是为了整合spring和mybatis。
由于mybatis需要用到数据库的配置，创建jdbc.properties

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/weixin?useUnicode=true&characterEncoding=utf-8
jdbc_username=root
jdbc_password=
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

现在开始配置spring-mybatis.xml文件。
需要实现自动扫描，自动注入，配置数据库。

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scan base-package="com.aheizi" />
    <!-- 引入配置文件 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:properties/jdbc.properties" />
    </bean>
 
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>
 
    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:com/aheizi/mapping/*.xml"></property>
    </bean>
 
    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.aheizi.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>
 
    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
 
</beans>

这里我们已经完成了spring和mybatis的整合。下面配置log4j和JUnit：

（3）Log4j的配置

Log4j是Apache的一个开源项目，通过使用Log4j，我们可以控制日志信息输送的目的地是控制台、文件、GUI组件，甚至是套接字的服务器，NT的事件记录器、UNIX Syslog守护进程等；我们可以控制每一条日志的输出格式；通过定义每一条日志信息的级别，我们能够更加细致的控制日志的生成过程。
Log4J的配置是通用的，下面给出基本配置。

#定义LOG输出级别
log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式，下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n
 
#文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = logs/ssm.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH:mm:ss}][%c]%m%n

（4）JUnit测试

下面写一个根据ID查询User的简单测试。
创建user表：

DROP TABLE IF EXISTS `user_t`;
 
CREATE TABLE `user_t` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(40) NOT NULL,
  `password` varchar(255) NOT NULL,
  `age` int(4) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
 
/*Data for the table `user_t` */
 
insert  into `user_t`(`id`,`user_name`,`password`,`age`) values (1,'测试','sfasgfaf',24);

创建实体类，Mybatis映射文件，以及DAO接口。（注:也可以使用MyBatis Generator自动创建代码，详情见http://blog.csdn.net/zhshulin/article/details/23912615）
User类：

package com.aheizi.domain;
public class User {
    private Integer id;
    private String userName;
    private String password;
    private Integer age;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName == null ? null : userName.trim();
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
}

UserMaper.xml

<?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.aheizi.dao.UserMapper" >
  <resultMap id="BaseResultMap" type="com.aheizi.domain.User" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="user_name" property="userName" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
    <result column="age" property="age" jdbcType="INTEGER" />
  </resultMap>
  
  <sql id="Base_Column_List" >
    id, user_name, password, age
  </sql>
  
  <select id="selectByUserId" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from user_t
    where id = #{id,jdbcType=INTEGER}
  </select>
  
</mapper>

UserMapper接口

package com.aheizi.Dao;
import com.aheizi.domain.User;
public interface UserMapper {
    int deleteByPrimaryKey(Integer id);
    int insert(User record);
    int insertSelective(User record);
    User selectByPrimaryKey(Integer id);
    int updateByPrimaryKeySelective(User record);
    int updateByPrimaryKey(User record);
}

service接口和实现类

接口UserService

package com.aheizi.service;
import com.aheizi.domain.User;
public interface UserService {
	
	public User getUserById(int userId);
	
}

实现类UserServiceImpl

package com.aheizi.service.impl;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.aheizi.dao.UserMapper;
import com.aheizi.domain.User;
import com.aheizi.service.UserService;
@Service("userService")
public class UserServiceImpl implements UserService {
	
	@Resource
	private UserMapper userDao;
	
	@Override
	public User getUserById(int userId) {
		// TODO Auto-generated method stub
		return userDao.selectByUserId(userId);
	}
}

建立测试类
测试类在src/test/java中建立。如果测试成功，表示Spring和Mybatis已经整合成功了。输出信息使用的是Log4j打印到控制台。

这里maven install的时候，可能会报错。
1.详见maven项目编译漏掉src/main/java下的xml配置文件
2.log4j的配置文件log4j.properties文件暂时需要先放在resource根目录下，默认的加载目录就是根目录。
等整合springMVC的时候可以在web.xml配置log4jConfigLocation来指定目录。

不使用spring，直接测试mybatis：

package com.aheizi.testmybatis;
import javax.annotation.Resource;
import org.apache.log4j.Logger;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.aheizi.domain.User;
import com.aheizi.service.UserService;
public class TestMybatis {
private static Logger logger = Logger.getLogger(TestSpringDemo.class);
	
	private ApplicationContext ac = null;
	
    @Resource
    private UserService userService = null;
    
	@Before
	public void before() {
	    ac = new ClassPathXmlApplicationContext("config/spring-mybatis.xml");
	    userService = (UserService) ac.getBean("userService");
	}
 
    @Test
    public void test1() {
        User user = userService.getUserById(1);
        logger.info("userName" + user.getUserName());
    }
}

测试输出：

[org.springframework.context.support.ClassPathXmlApplicationContext] - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@51de0b09: startup date [Tue Sep 01 18:06:48 CST 2015]; root of context hierarchy
[org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from class path resource [config/spring-mybatis.xml]
[org.springframework.beans.factory.config.PropertyPlaceholderConfigurer] - Loading properties file from class path resource [properties/jdbc.properties]
[org.springframework.beans.factory.support.DefaultListableBeanFactory] - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@524decad: defining beans [userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,propertyConfigurer,dataSource,sqlSessionFactory,org.mybatis.spring.mapper.MapperScannerConfigurer#0,transactionManager,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,userMapper]; root of factory hierarchy
[com.aheizi.testmybatis.TestSpringDemo] - userName测试

使用Spring，使用了Spring那么就可以使用注解的方式来引入配置文件和类，然后再将service接口对象注入。

package com.aheizi.testmybatis;

import javax.annotation.Resource;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.aheizi.domain.User;
import com.aheizi.service.UserService;

@RunWith(SpringJUnit4ClassRunner.class)     //表示继承了SpringJUnit4ClassRunner类
@ContextConfiguration(locations = {"classpath*:config/spring-mybatis.xml"})
public class TestSpringDemo {
	private static Logger logger = Logger.getLogger(TestSpringDemo.class);
	
    @Resource
    private UserService userService = null;
    
    @Test
    public void test1() {
        User user = userService.getUserById(1);
        logger.info("userName" + user.getUserName());
    }
	
}

测试输出：

[org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from URL [file:/D:/workspace/springDemo/target/classes/config/spring-mybatis.xml]
[org.springframework.context.support.GenericApplicationContext] - Refreshing org.springframework.context.support.GenericApplicationContext@58d7330d: startup date [Tue Sep 01 18:15:56 CST 2015]; root of context hierarchy
[org.springframework.beans.factory.config.PropertyPlaceholderConfigurer] - Loading properties file from class path resource [properties/jdbc.properties]
[org.springframework.beans.factory.support.DefaultListableBeanFactory] - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6a9b65cc: defining beans [userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,propertyConfigurer,dataSource,sqlSessionFactory,org.mybatis.spring.mapper.MapperScannerConfigurer#0,transactionManager,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,userMapper]; root of factory hierarchy
[com.aheizi.testmybatis.TestSpringDemo] - userName测试
[org.springframework.context.support.GenericApplicationContext] - Closing org.springframework.context.support.GenericApplicationContext@58d7330d: startup date [Tue Sep 01 18:15:56 CST 2015]; root of context hierarchy
[org.springframework.beans.factory.support.DefaultListableBeanFactory] - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6a9b65cc: defining beans [userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,propertyConfigurer,dataSource,sqlSessionFactory,org.mybatis.spring.mapper.MapperScannerConfigurer#0,transactionManager,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,userMapper]; root of factory hierarchy

并且这两种测试的时候会伴随着日志文件的输出。

源码下载地址：源码