spring boot integrated mybatis three ways！--转

https://github.com/spring-projects/spring-boot/issues/5400

一、使用mybatis-spring-boot-starter
1、添加依赖

org.mybatis.spring.boot
mybatis-spring-boot-starter
1.0.0

2、启动时导入指定的sql(application.properties)
spring.datasource.schema=import.sql
3、annotation形式
@springbootapplication
@mapperscan("sample.mybatis.mapper")
public class SampleMybatisApplication implements CommandLineRunner {

@Autowired
private CityMapper cityMapper;

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

@Override
public void run(String... args) throws Exception {
    System.out.println(this.cityMapper.findByState("CA"));
}

}
4、xml方式
mybatis-config.xml

application.properties

spring.datasource.schema=import.sql
mybatis.config=mybatis-config.xml
mapper

@component
public class CityMapper {

@Autowired
private SqlSessionTemplate sqlSessionTemplate;

public City selectCityById(long id) {
    return this.sqlSessionTemplate.selectOne("selectCityById", id);
}

}
二、手工集成
1、annotation方式
@configuration
@mapperscan("com.xixicat.modules.dao")
@propertysources({ @propertysource(value = "classpath:application.properties", ignoreResourceNotFound = true), @propertysource(value = "file:./application.properties", ignoreResourceNotFound = true) })
public class MybatisConfig {

@Value("${name:}")
private String name;

@Value("${database.driverClassName}")
private String driverClass;

@Value("${database.url}")
private String jdbcUrl;

@Value("${database.username}")
private String dbUser;

@Value("${database.password}")
private String dbPwd;

@Value("${pool.minPoolSize}")
private int minPoolSize;

@Value("${pool.maxPoolSize}")
private int maxPoolSize;


@Bean
public Filter characterEncodingFilter() {
    CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
    characterEncodingFilter.setEncoding("UTF-8");
    characterEncodingFilter.setForceEncoding(true);
    return characterEncodingFilter;
}

@Bean(destroyMethod = "close")
public DataSource dataSource(){
    HikariConfig hikariConfig = new HikariConfig();
    hikariConfig.setDriverClassName(driverClass);
    hikariConfig.setJdbcUrl(jdbcUrl);
    hikariConfig.setUsername(dbUser);
    hikariConfig.setPassword(dbPwd);
    hikariConfig.setPoolName("springHikariCP");
    hikariConfig.setAutoCommit(false);
    hikariConfig.addDataSourceProperty("cachePrepStmts", "true");
    hikariConfig.addDataSourceProperty("prepStmtCacheSize", "250");
    hikariConfig.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
    hikariConfig.addDataSourceProperty("useServerPrepStmts", "true");

    hikariConfig.setMinimumIdle(minPoolSize);
    hikariConfig.setMaximumPoolSize(maxPoolSize);
    hikariConfig.setConnectionInitSql("SELECT 1");

    HikariDataSource dataSource = new HikariDataSource(hikariConfig);
    return dataSource;
}

@Bean
public PlatformTransactionManager transactionManager() {
    return new DataSourceTransactionManager(dataSource());
}

@Bean
public SqlSessionFactory sqlSessionFactory() throws Exception {
    SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
    sessionFactory.setDataSource(dataSource());
    sessionFactory.setFailFast(true);
    sessionFactory.setConfigLocation(new ClassPathResource("mybatis-config.xml"));
    return sessionFactory.getObject();
}

}
点评

这种方式有点别扭，而且配置不了拦截式事务拦截，只能采用注解声明，有些冗余

2、xml方式
数据源

<context:property-placeholder ignore-unresolvable="true" />

<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
    <property name="poolName" value="springHikariCP" />
    <property name="connectionTestQuery" value="SELECT 1" />
    <property name="dataSourceClassName" value="${database.dataSourceClassName}" />
    <property name="maximumPoolSize" value="${pool.maxPoolSize}" />
    <property name="idleTimeout" value="${pool.idleTimeout}" />

    <property name="dataSourceProperties">
        <props>
            <prop key="url">${database.url}</prop>
            <prop key="user">${database.username}</prop>
            <prop key="password">${database.password}</prop>
        </props>
    </property>
</bean>

<!-- HikariCP configuration -->
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">
    <constructor-arg ref="hikariConfig" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!-- 配置mybatis配置文件的位置 -->
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
    <property name="typeAliasesPackage" value="com.xixicat.domain"/>
    <!-- 配置扫描Mapper XML的位置 -->
    <property name="mapperLocations" value="classpath:com/xixicat/modules/dao/*.xml"/>


</bean>

<!-- 配置扫描Mapper接口的包路径 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    <property name="basePackage" value="com.xixicat.repository.mapper"/>
</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg ref="sqlSessionFactory"/>
</bean>

<bean id="transactionManager"
      class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
      p:dataSource-ref="dataSource"/>
<aop:aspectj-autoproxy expose-proxy="true" proxy-target-class="true" />

<tx:advice id="txAdvice" transaction-manager="transactionManager" >
    <tx:attributes>
        <tx:method name="start*" propagation="REQUIRED"/>
        <tx:method name="submit*" propagation="REQUIRED"/>
        <tx:method name="clear*" propagation="REQUIRED"/>
        <tx:method name="create*" propagation="REQUIRED"/>
        <tx:method name="activate*" propagation="REQUIRED"/>
        <tx:method name="save*" propagation="REQUIRED"/>
        <tx:method name="insert*" propagation="REQUIRED"/>
        <tx:method name="add*" propagation="REQUIRED"/>
        <tx:method name="update*" propagation="REQUIRED"/>
        <tx:method name="delete*" propagation="REQUIRED"/>
        <tx:method name="remove*" propagation="REQUIRED"/>
        <tx:method name="execute*" propagation="REQUIRED"/>
        <tx:method name="del*" propagation="REQUIRED"/>
        <tx:method name="*" read-only="true"/>
    </tx:attributes>
</tx:advice>
<aop:config proxy-target-class="true" expose-proxy="true">
    <aop:pointcut id="pt" expression="execution(public * com.xixicat.service.*.*(..))" />
    <aop:advisor order="200" pointcut-ref="pt" advice-ref="txAdvice"/>
</aop:config>

aop依赖

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

mybatis-spring等依赖

    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.3.0</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.2.2</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.6</version>
    </dependency>

    <!--<dependency>-->
        <!--<groupId>org.hsqldb</groupId>-->
        <!--<artifactId>hsqldb</artifactId>-->
        <!--<scope>runtime</scope>-->
    <!--</dependency>-->

    <dependency>
        <groupId>com.zaxxer</groupId>
        <artifactId>HikariCP-java6</artifactId>
        <version>2.3.8</version>
    </dependency>

指定xml配置文件

@configuration
@componentscan( basePackages = {"com.xixicat"} )
@importresource("classpath:applicationContext-mybatis.xml")
@enableautoconfiguration
public class AppMain {

// 用于处理编码问题
@Bean
public Filter characterEncodingFilter() {
    CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
    characterEncodingFilter.setEncoding("UTF-8");
    characterEncodingFilter.setForceEncoding(true);
    return characterEncodingFilter;
}

//文件下载
@Bean
public HttpMessageConverters restFileDownloadSupport() {
    ByteArrayHttpMessageConverter arrayHttpMessageConverter = new ByteArrayHttpMessageConverter();
    return new HttpMessageConverters(arrayHttpMessageConverter);
}

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

}
点评

跟传统的方式集成最为直接，而且事务配置也比较容易上手