本博客介紹一下SpringBoot集成Mybatis，數據庫連接池使用alibaba的druid，使用SpringBoot微框架雖然集成Mybatis之後可以不使用xml的方式來寫sql，但是用慣了xml的其實也可以用xml來實現的，實現上具體用什麽方式並不重要，主要是搭建一遍，對框架的運轉就比較清晰。本博客還是用xml的方式來實現Mybatis的sql編寫，不用註解方式。

maven配置

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

當然要引入druid，mysql等等jar的話可以參考我一個項目裏的parent工程的maven配置：

<?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>com.muses.taoshop</groupId>
  <artifactId>taoshop</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>taoshop</name>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.7.RELEASE</version>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- 模塊版本 -->
    <taoshop-web-portal.version>1.0</taoshop-web-portal.version>

    <!-- 外部依賴 -->
    <log4j.version>1.2.17</log4j.version>
    <mysql.version>5.1.27</mysql.version>
    <mybatis.version>3.4.0</mybatis.version>
    <mybatis.spring.version>1.3.0</mybatis.spring.version>
    <mybatis.springboot.version>1.3.1</mybatis.springboot.version>
    <mysql-connector.version>5.1.39</mysql-connector.version>
    <spring-boot.version>1.5.7.RELEASE</spring-boot.version>
    <druid.version>1.1.2</druid.version>
    <github.pagehelper.version>4.2.1</github.pagehelper.version>
    <fastjson.version>1.2.7</fastjson.version>
    <lombok.version>1.16.10</lombok.version>
  </properties>

  <modules>
    <module>taoshop-quartz</module>
    <module>taoshop-search</module>
    <module>taoshop-common</module>
    <module>taoshop-provider-api</module>
    <module>taoshop-provider</module>
    <module>taoshop-manager</module>
    <module>taoshop-portal</module>
    <module>taoshop-cms</module>
    <module>taoshop-order</module>
      <module>taoshop-sso</module>
  </modules>

  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
          <filtering>true</filtering>
      </resource>
    </resources>
    <plugins>
      <!-- 設置源文件編譯 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.6.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <compilerVersion>1.8</compilerVersion>
          <encoding>UTF-8</encoding>
          <skipMain></skipMain>
          <annotationProcessorPaths>
            <path>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <version>${lombok.version}</version>
            </path>
          </annotationProcessorPaths>

        </configuration>
      </plugin>

      <!-- 解決資源文件的編碼問題 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>3.0.2</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>

    </plugins>
  </build>


  <dependencies>
    <!-- Spring boot -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <version>${spring-boot.version}</version>
    </dependency>

    <!-- redis -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
      <version>${spring-boot.version}</version>
    </dependency>

    <!-- springboot mybatis-->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>${mybatis.springboot.version}</version>
    </dependency>

   <!-- 熱部署-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <optional>true</optional>
    </dependency>

    <!--  alibaba druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid-spring-boot-starter</artifactId>
      <version>${druid.version}</version>
    </dependency>

    <!-- Themeleaf -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

    <!-- pagehelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${github.pagehelper.version}</version>
    </dependency>

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

    <!-- fastjson -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.35</version>
    </dependency>

    <!-- lombok -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>${lombok.version}</version>
    </dependency>

    <!-- 其他工具包-->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.2</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.9</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.5</version>
    </dependency>
  </dependencies>
  <!--  設定Maven主倉庫為阿裏私服 -->
  <repositories>
    <repository>
      <id>repos</id>
      <name>Repository</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </repository>
  </repositories>

  <!--  設定插件倉庫 -->
  <pluginRepositories>
    <pluginRepository>
      <id>pluginsRepos</id>
      <name>PluginsRepository</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </pluginRepository>
  </pluginRepositories>

</project>
 

SpringBoot配置文件

server:
  port: 8081
#logging:
#  config: classpath:logback_spring.xml.bat
#  level:
#    com.muses.taoshop: debug
#  path: /data/logs

spring:
  datasource:

    # 主數據源
    shop:
      url: jdbc:mysql://127.0.0.1:3306/taoshop?autoReconnect=true&useUnicode=true&characterEncoding=utf8&characterSetResults=utf8&useSSL=false
      username: root
      password: root

    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

    # 連接池設置
    druid:
      initial-size: 5
      min-idle: 5
      max-active: 20
      # 配置獲取連接等待超時的時間
      max-wait: 60000
      # 配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒
      time-between-eviction-runs-millis: 60000
      # 配置一個連接在池中最小生存的時間，單位是毫秒
      min-evictable-idle-time-millis: 300000
      # Oracle請使用select 1 from dual
      validation-query: SELECT ‘x‘
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      # 打開PSCache，並且指定每個連接上PSCache的大小
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      # 配置監控統計攔截的filters，去掉後監控界面sql無法統計，‘wall‘用於防火墻
      filters: stat,wall,slf4j
      # 通過connectProperties屬性來打開mergeSql功能；慢SQL記錄
      connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
      # 合並多個DruidDataSource的監控數據
      use-global-data-source-stat: true

#  jpa:
#    database: mysql
#    hibernate:
#      show_sql: true
#      format_sql: true
#      ddl-auto: none
#      naming:
#        physical-strategy: org.hibernate.boot.entity.naming.PhysicalNamingStrategyStandardImpl

#  mvc:
#    view:
#      prefix: /WEB-INF/jsp/
#      suffix: .jsp

  #添加Thymeleaf配置
  thymeleaf:
    cache: false
    prefix: classpath:/templates/
    suffix: .html
    mode: HTML5
    encoding: UTF-8
    content-type: text/html

  #Jedis配置
#  jedis :
#    pool :
#      host : 127.0.0.1
#      port : 6379
#      password : redispassword
#      timeout : 0
#      config :
#        maxTotal : 100
#        maxIdle : 10
#        maxWaitMillis : 100000



 

Application啟動類

package com.muses.taoshop;



import org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration;
import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.stereotype.*;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.bind.annotation.*;
/**
 *
 * <pre>
 *  SpringBoot啟動配置類
 * </pre>
 * @author nicky
 * @version 1.00.00
 * <pre>
 * 修改記錄
 *    修改後版本:     修改人：  修改日期:     修改內容:
 * </pre>
 */
@Controller
@EnableScheduling//開啟對計劃任務的支持
@EnableTransactionManagement//開啟對事務管理配置的支持
@EnableCaching
@EnableAsync//開啟對異步方法的支持
@EnableAutoConfiguration
@ServletComponentScan
@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,
        MybatisAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class})
public class PortalApplication {

    @RequestMapping("/")
    @ResponseBody
    String home() {
        return "portal web!";
    }

    @RequestMapping("/doTest")
    @ResponseBody
    String doTest(){
        System.out.println(Thread.currentThread().getName());
        String threadName = Thread.currentThread().getName();
        return threadName;
    }


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


}

@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,
MybatisAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class})，這個註釋是必須的，開啟自動掃描數據源和Mybatis配置文件

數據庫配置
做好SpringBoot啟動類的註解之後，需要編寫Mybatis和數據源的配置類

寫一個Constants類：

package com.muses.taoshop.common.core.database.config;

/**
 * <pre>
 *  基本配置類
 * </pre>
 *
 * @author nicky
 * @version 1.00.00
 * <pre>
 * 修改記錄
 *    修改後版本:     修改人：  修改日期:     修改內容:
 * </pre>
 */
public class BaseConfig {

    /**
     * 設置主數據源名稱
     */
    public static final String DATA_SOURCE_NAME = "shop";

    /**
     * 加載配置文件信息
     */
    public static final String DATA_SOURCE_PROPERTIES = "spring.datasource.shop";

    /**
     * repository 所在包
     */
    public static final String REPOSITORY_PACKAGES = "com.muses.taoshop.**.repository";

    /**
     * mapper 所在包
     */
    public static final String MAPPER_PACKAGES = "com.muses.taoshop.**.mapper";

    /**
     * 實體類 所在包
     */
    public static final String ENTITY_PACKAGES = "com.muses.taoshop.*.entity";

    /**
     * 自定義TypeHandler
     */
    public static final String TYPE_HANDLERS_PACKAGES = "com.muses.taoshop.common.core.database.typehandlers";

    /**
     * Mybatis session 工廠
     */
    public static final String SQL_SESSION_FACTORY = "sqlSessionFactory";

    /**
     * Mybatis 事務管理器
     */
    public static final String MYBATIS_TRANSACTION_MANAGER = "mybatisTransactionManager";

    /**
     * Jedis連接池
     */
    public static final String JEDIS_POOL = "jedisPool";

    /**
     * Jedis連接池配置
     */
    public static final String JEDIS_POOL_CONFIG = "jedisPoolConfig";

}

DataSource配置類：

package com.muses.taoshop.common.core.database.config;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

import static com.muses.taoshop.common.core.database.config.BaseConfig.DATA_SOURCE_NAME;
import static com.muses.taoshop.common.core.database.config.BaseConfig.DATA_SOURCE_PROPERTIES;


/**
 * <pre>
 *  DataSource配置類
 * </pre>
 *
 * @author nicky
 * @version 1.00.00
 * <pre>
 * 修改記錄
 *    修改後版本:     修改人：  修改日期:     修改內容:
 * </pre>
 */
@Configuration
public class DataSourceConfig {

    @Bean(name = DATA_SOURCE_NAME)
    @ConfigurationProperties(prefix = DATA_SOURCE_PROPERTIES)
    public DataSource dataSource() {
        return DruidDataSourceBuilder.create().build();
    }
}

Mybatis配置類：

package com.muses.taoshop.common.core.database.config;

//import com.muses.taoshop.common.core.database.annotation.MybatisRepository;
import com.muses.taoshop.common.core.database.annotation.TypeAliasesPackageScanner;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.*;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;

import static com.muses.taoshop.common.core.database.config.BaseConfig.*;

/**
 * <pre>
 *  Mybatis配置類
 * </pre>
 *
 * @author nicky
 * @version 1.00.00
 * <pre>
 * 修改記錄
 *    修改後版本:     修改人：  修改日期:     修改內容:
 * </pre>
 */
@MapperScan(
        basePackages = MAPPER_PACKAGES,
        //annotationClass = MybatisRepository.class,
        sqlSessionFactoryRef = SQL_SESSION_FACTORY
)
@ComponentScan
@EnableTransactionManagement
@Configuration
public class MybatisConfig {


    //@Autowired
   //MybatisSqlInterceptor mybatisSqlInterceptor;

    TypeAliasesPackageScanner packageScanner = new TypeAliasesPackageScanner();

    @Bean(name = DATA_SOURCE_NAME)
    @ConfigurationProperties(prefix = DATA_SOURCE_PROPERTIES)
    @Primary
    public DataSource dataSource(){
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = SQL_SESSION_FACTORY)
    public SqlSessionFactory sqlSessionFactory(@Qualifier(DATA_SOURCE_NAME)DataSource dataSource)throws Exception{
        //SpringBoot默認使用DefaultVFS進行掃描，但是沒有掃描到jar裏的實體類
        VFS.addImplClass(SpringBootVFS.class);
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        //factoryBean.setPlugins(new Interceptor[]{mybatisSqlInterceptor});
        factoryBean.setDataSource(dataSource);
        //factoryBean.setConfigLocation(new ClassPathResource("mybatis-config.xml"));
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        try{
            factoryBean.setMapperLocations(resolver.getResources("classpath*:/mybatis/*Mapper.xml"));
            String typeAliasesPackage = packageScanner.getTypeAliasesPackages();
            factoryBean.setTypeAliasesPackage(typeAliasesPackage);
            SqlSessionFactory sqlSessionFactory = factoryBean.getObject();
            return sqlSessionFactory;
        }catch (Exception e){
            e.printStackTrace();
            throw new RuntimeException();
        }
    }

    @Bean(name = MYBATIS_TRANSACTION_MANAGER)
    public DataSourceTransactionManager transactionManager(@Qualifier(DATA_SOURCE_NAME)DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }


}

通配符別名掃描
這裏需要註意一點，因為項目業務需要，這裏的別名掃描是做到了竟然通配符的，詳情可以參考我之前的博客：https://blog.csdn.net/u014427391/article/details/84723292

Mybatis例子實踐
所以，SpringBoot集成Mybatis就基本搭建好了，下面來實踐一個例子：
註意：Mybatis的xml文件都要放在resources資源文件夾下面的一個Mybatis文件夾裏面，因為已經做了配置

factoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/Mapper.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.muses.taoshop.item.mapper.ItemMapper" >

    <sql id="BaseColumnList" >
        id ,
        sku_code ,
        sku_name ,
        price ,
        stock ,
        last_modify_time as lastModifyTime,
        create_time as createTime
    </sql>
    <sql id="OrderBy">
        ORDER BY price
    </sql>

    <!-- 商品詳情-->
    <select id="getItemDetail" resultType="ItemDetail">
        SELECT
          itb.brand_name AS brandName,
          s.shop_name AS shopName,
          spu.item_name AS itemName,
          sku.price,
          sku.promotion_price AS promotionPrice,
          sku.img_path AS imgPath,
          sku.stock
        FROM
          item_spu spu
        RIGHT JOIN item_brand itb
          ON itb.id = spu.brand_id
       RIGHT JOIN shop_info s
          ON s.id = spu.shop_id
        LEFT JOIN
        (SELECT
              s.price,
              s.promotion_price,
              s.spu_id,
              s.img_path,
              s.stock
         FROM
              item_sku s
          GROUP BY s.spu_id) sku
        ON sku.spu_id = spu.id
        <where>
            spu.id = #{spuId}
        </where>
    </select>

</mapper>

Mapper接口類：

package com.muses.taoshop.item.mapper;


import com.muses.taoshop.item.entity.ItemDetail;
import com.muses.taoshop.item.entity.ItemPortal;
import com.muses.taoshop.item.entity.ItemSpec;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

import java.util.List;

@Mapper
public interface ItemMapper {

    ItemDetail getItemDetail(@Param("spuId")int spuId);

}

業務接口類：

package com.muses.taoshop.item.service;

import com.muses.taoshop.item.entity.ItemDetail;
import com.muses.taoshop.item.entity.ItemPortal;
import com.muses.taoshop.item.entity.ItemSpec;
import com.muses.taoshop.item.mapper.ItemMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <pre>
 *  商品信息服務實現類
 * </pre>
 *
 * @author nicky
 * @version 1.00.00
 * <pre>
 * 修改記錄
 *    修改後版本:     修改人：  修改日期: 2018.06.24 22:37    修改內容:
 * </pre>
 */
@Service
public class ItemServiceImpl implements IItemService {

    @Autowired
    ItemMapper itemMapper;

    /**
     * 獲取商品詳情信息
     * @return ItemDetail
     */
    @Override
    public ItemDetail getItemDetailInfo(int spuId){
        ItemDetail itemDetail = itemMapper.getItemDetail(spuId);
        return  itemDetail;
    }


}

代碼取自個人的開源項目：https://github.com/u014427391/taoshop，有需要可以參考

SpringBoot+Mybatis集成搭建