搭建Spring + SpringMVC + Mybatis框架之二（整合Spring和Mybatis）
2015-09-04 17:29
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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
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