Mybatis
文件结构 src ├── main │ ├── java │ │ └── com │ │ └── demo │ │ ├── dao │ │ │ └── UserDao.java │ │ └── entity │ │ └── UserEntity.java │ └── resources │ ├── jdbc.properties │ ├── mapper │ │ └── User.xml │ ├── mybatis-config.xml │ └── spring │ └── spring-dao.xml pom.xml中引入依赖 <?xml version="1.0" encoding="UTF-8"?> <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>my-java-demo</groupId> <artifactId>mybatis</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <!--3.0的junit是使用编程的方式来进行测试，而junit4是使用注解的方式来运行junit--> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!--1.数据库相关依赖--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version> <scope>runtime</scope> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.1</version> </dependency> <!--2.dao框架:MyBatis依赖--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.3.0</version> </dependency> <!--mybatis自身实现的spring整合依赖--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.3</version> </dependency> <!--4:spring依赖--> <!--1)spring核心依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--2)spring dao层依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--3)springweb相关依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.1.7.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.1.7.RELEASE</version> </dependency> <!--4)spring test相关依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.1.7.RELEASE</version> </dependency> </dependencies> </project> 配置mybatis-config.xml <?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="cacheEnabled" value="false" /> <setting name="localCacheScope" value="STATEMENT" /> <setting name="mapUnderscoreToCamelCase" value="true" /> <setting name="useGeneratedKeys" value="true" /> <setting name="defaultStatementTimeout" value="1" /> </settings> </configuration> 配置jdbc.properties driver=com.mysql.jdbc.Driver url=jdbc:mysql://127.0.0.1:3306/develop?setUnicode=true&characterEncoding=utf8 username=root password= 编写dao接口和entity类 dao接口可不用实现 entity类中只需要添加属性以及getter和setter即可 添加mapper 在resource中添加dao对应的mapper，mapper中写sql语句 添加spirng-dao.xml 将spring和mybatis整合起来需要一个配置文件 <?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:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--配置整合mybatis过程 1.配置数据库相关参数--> <context:property-placeholder location="classpath:jdbc.properties"/> <!--2.数据库连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!--配置连接池属性--> <property name="driverClass" value="${driver}" /> <!-- 基本属性 url、user、password --> <property name="jdbcUrl" value="${url}" /> <property name="user" value="${username}" /> <property name="password" value="${password}" /> <!--c3p0私有属性--> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!--关闭连接后不自动commit--> <property name="autoCommitOnClose" value="false"/> <!--获取连接超时时间--> <property name="checkoutTimeout" value="1000"/> <!--当获取连接失败重试次数--> <property name="acquireRetryAttempts" value="2"/> </bean> <!--约定大于配置--> <!--３.配置SqlSessionFactory对象--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!--往下才是mybatis和spring真正整合的配置--> <!--注入数据库连接池--> <property name="dataSource" ref="dataSource"/> <!--配置mybatis全局配置文件:mybatis-config.xml--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <!--扫描entity包,使用别名,多个用;隔开--> <property name="typeAliasesPackage" value="com.demo.entity"/> <!--扫描sql配置文件:mapper需要的xml文件--> <property name="mapperLocations" value="classpath:mapper/*.xml"/> </bean> <!--４:配置扫描Dao接口包,动态实现DAO接口,注入到spring容器--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入SqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 给出需要扫描的Dao接口--> <property name="basePackage" value="com.demo.dao"/> </bean> </beans> 批量插入返回自增id 版本3.3.1之后才支持, 入参的集合名称必须叫collection、list、array ...