SpringBoot+多数据源(MySQL)

1.引入数据源：

（1）在application.local.properties 配置多个数据源连接：

spring.datasource.primary.url=XXXXXXXX?useUnicode=true&characterEncoding=UTF-8
spring.datasource.primary.username=XXXXXXXX
spring.datasource.primary.password=XXXXXXXX
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.secondary.url=XXXXXXXX?useUnicode=true&characterEncoding=UTF-8
spring.datasource.secondary.username=XXXXXXXX
spring.datasource.secondary.password=XXXXXXXX
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

备注：在引入多数据源的时候需要在application.properties配置连接池避免连接超时的问题

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.initial-size=1
spring.datasource.druid.min-idle=1
spring.datasource.druid.max-active=20
spring.datasource.druid.test-on-borrow=true
spring.datasource.druid.stat-view-servlet.allow=true

（2）springBoot启动Application类：

@EnableTransactionManagement
@SpringBootApplication
@ComponentScan(basePackages = {
        "com.***.***.***.config"  此处扫描的应该为数据源配置所在的类包
})
public class SccSupplierApplication {

    private static Logger logger = LoggerFactory.getLogger(ServletInitializer.class);

    public static void main(String[] args) {
        logger.info("SccSupplierApplication starting");

        ConfigurableApplicationContext app = SpringApplication.run(SccSupplierApplication.class, args);

        logger.info("SccSupplierApplication start success");
    }

}

（3）数据源的配置：

数据源-01
@Configuration
@MapperScan(basePackages = {"***.***.***.sysMapper"}, sqlSessionTemplateRef  = "test1SqlSessionTemplate")
public class DataSource1 {
    @Bean(name = "test1DataSource")
    @ConfigurationProperties(prefix ="spring.datasource.primary")
    @Primary
    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }
    @Bean(name = "test1SqlSessionFactory")
    @Primary
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        Resource[] resources2 = new PathMatchingResourcePatternResolver().getResources("classpath*:**/mapper/*Mapper.xml");
        Resource[] resources = new PathMatchingResourcePatternResolver().getResources("classpath*:**/sysMapper/**/*Mapper.xml");
        Resource[] resources3 = new Resource[11];
        for (int i = 0; i <=10; i++) {
            resources3[i]=resources2[i];
        }
        Resource[] allResource = (Resource[]) ArrayUtils.addAll(resources3, resources);
        bean.setMapperLocations(allResource);
        return bean.getObject();

    }
    @Bean(name = "test1TransactionManager")
    @Primary
    public PlatformTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
    @Bean(name = "test1SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

数据源-02
@Configuration
@MapperScan(basePackages ={"com.***.***.mpoMapper"},sqlSessionTemplateRef  = "test2SqlSessionTemplate")
public class DataSource2 {
    @Bean(name = "test2DataSource")
    @ConfigurationProperties(prefix ="spring.datasource.secondary")
    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }
    @Bean(name = "test2SqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:**/mpoMapper/*Mapper.xml"));
        return bean.getObject();
    }
    @Bean(name = "test2TransactionManager")
    public PlatformTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
    @Bean(name = "test2SqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

备注：IDEA和Eclipse不太一样，关于扫XML，映射文件的XML需要放在Resource包下，并且需要在POM中加:

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>

最后运行成功。

很多第一次引入多数据源会出现无效绑定此类异常，这些根本原因就是因为没有扫到对应的Mapper或者XML。

-----2018-4-13 17:25

SpringBoot+多数据源(MySQL)

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