spring mvc + mybatis + mysql的项目架构应该是目前主流的项目架构了,本篇文章就详解这三者是如何集成到一起的。
1. 先上项目中要使用到的依赖包，上代码
<mysql.version>5.1.26</mysql.version> <spring.version>4.3.12.RELEASE</spring.version> <mybatis.version>3.4.5</mybatis.version> <mybatis-spring.version>1.3.0</mybatis-spring.version>
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- db --> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency>
<!-- spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</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</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-context-support</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-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-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency
2. mybatis 和 mysql 的配置文件
<?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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <context:property-placeholder ignore-unresolvable="true" location="classpath:jdbc/jdbc.properties"/><!-- 加载数据库的配置信息 --> <!-- 配置数据库 的相关信息--> <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="initialSize" value="${jdbc.initialSize}" /> <property name="maxActive" value="${jdbc.maxActive}" /> <property name="minIdle" value="${jdbc.minIdle}" /> <property name="maxWait" value="${jdbc.maxWait}" /> <property name="timeBetweenEvictionRunsMillis" value="${jdbc.timeBetweenEvictionRunsMillis}" /> <property name="minEvictableIdleTimeMillis" value="${jdbc.minEvictableIdleTimeMillis}" /> <property name="testWhileIdle" value="${jdbc.testWhileIdle}" /> <property name="testOnBorrow" value="${jdbc.testOnBorrow}" /> <property name="testOnReturn" value="${jdbc.testOnReturn}" /> </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" /> <property name="configLocation" value="classpath:jdbc/mybatis-config.xml" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations"> <array> <value>classpath:user.map/*.xml</value> <value>classpath:log.map/*.xml</value> </array> </property> </bean> <!-- dao的id名和*.xml中的id名字一一对应 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ctp.ghub.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事务管理)transaction manager <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 使用annotation注解方式配置事务，只要在代码中使用注解即可 --> <tx:annotation-driven transaction-manager="transactionManager" /> </beans>
2.1 mybatis-config.xml的配置文件，里面放开注释，即可在控制台打印sql日志
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- <settings> <setting name="logImpl" value="STDOUT_LOGGING" /> </settings> --> </configuration>
2.2 mysql的配置信息
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/ghub?useUnicode=true&characterEncoding=UTF-8 jdbc.username=root jdbc.password=123456 jdbc.initialSize=0 jdbc.maxActive=20 jdbc.minIdle=1 jdbc.maxWait=60000 jdbc.timeBetweenEvictionRunsMillis=60000 jdbc.minEvictableIdleTimeMillis=1800000 jdbc.testWhileIdle=true jdbc.testOnBorrow=false jdbc.testOnReturn=false
2.3 dao的配置文件中需要添加注解扫描，这样dao中有添加@Repository的bean才能被spring容器管理，进行实例化和依赖注入
2.4 最后在applicationContext.xml文件中需要把相关的配置文件导入进来，这样spring容器在加载的时候，才能把这些相关的配置文件中的内容读取并加载
3. 最后展示一下整个项目的结构
好了，整个spring mvc mybatis mysql的项目搭建已经完成。