上一篇文章：Spring Boot教程 - 整合Mybatis（基于XML配置） 介紹了 Spring Boot集成Mybatis 基于XML方式的配置，本文將重點介紹 注解方式配置Mybatis 。

開發(fā)環(huán)境

• JDK 1.8
• Maven 3.3
• Spring Boot 1.5.8.RELEASE
• Mybatis 3.4.4

配置

首先引入spring-boot-starter-parent:

    <!-- Inherit defaults from Spring Boot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
    </parent>

添加Mybatis依賴：

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- db-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.connector.version}</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
    </dependencies>

application.yml

server:
  port: 9000
  
spring:
    datasource:
       url: jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
       username: root
       password: root
       driver-class-name: com.mysql.jdbc.Driver

MybatisConfiguration

package springboot.tutorials.mybatis.annotation.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;

/**
 * @author Ricky Fung
 */
@Configuration
@MapperScan(basePackages = "springboot.tutorials.mybatis.annotation.mapper",
        sqlSessionFactoryRef = "sqlSessionFactory")
public class MybatisConfiguration {

    static final String MAPPER_LOCATION = "classpath:mapper/*.xml";

    @Value("${spring.datasource.url}")
    private String url;

    @Value("${spring.datasource.username}")
    private String user;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.driver-class-name}")
    private String driverClass;

    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("dataSource") DataSource dataSource)
            throws Exception {
        final SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(MAPPER_LOCATION));
        return sqlSessionFactoryBean.getObject();
    }

    @Bean(name = "dataSource")
    public DataSource dataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean(name = "transactionManager")
    public DataSourceTransactionManager transactionManager() {
        return new DataSourceTransactionManager(dataSource());
    }
}

涉及到的Mybatis Mapper類和Mapper文件 建議通過Mybatis-Generator來自動生成，簡單、高效。

啟動類App

package springboot.tutorials.mybatis.annotation;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @author Ricky Fung
 */
@SpringBootApplication
public class App {

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

源碼

傳送門：spring-boot-mybatis3-annotation-config