SpringBoot+多數據源(MySQL)

1.引入數據源：

    （1）在application.local.properties 配置多個數據源鏈接：

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

備註：在引入多數據源的時候須要在application.properties配置鏈接池避免鏈接超時的問題

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啓動Application類：

@EnableTransactionManagement
@SpringBootApplication
@ComponentScan(basePackages = {
        "com.***.***.***.config"  此處掃描的應該爲數據源配置所在的類包
})
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）數據源的配置：

數據源-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);
    }
}

數據源-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);
    }
}

備註：IDEA和Eclipse不太同樣，關於掃XML，映射文件的XML須要放在Resource包下，而且須要在POM中加:

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

 

最後運行成功。

不少第一次引入多數據源會出現 無效綁定此類異常，這些根本緣由就是由於沒有掃到對應的Mapper或者XML。

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