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
int batchInsert(List<Area> list);
mapper.xml
<insert id="batchInsert" useGeneratedKeys="true" keyProperty="id">
INSERT INTO account (province, city) VALUES
<foreach collection="list" item="area" separator=",">
(#{area.province},#{area.city})
</foreach>
</insert>