public void afterPropertiesSet() {
        if (this.targetDataSources == null) {
            throw new IllegalArgumentException("Property 'targetDataSources' is required");
        }
        this.resolvedDataSources = new HashMap<Object, DataSource>(this.targetDataSources.size());
        for (Map.Entry<Object, Object> entry : this.targetDataSources.entrySet()) {
            Object lookupKey = resolveSpecifiedLookupKey(entry.getKey());
            DataSource dataSource = resolveSpecifiedDataSource(entry.getValue());
            this.resolvedDataSources.put(lookupKey, dataSource);
        if (this.defaultTargetDataSource != null) {
            this.resolvedDefaultDataSource = resolveSpecifiedDataSource(this.defaultTargetDataSource);
    }

@Override
public Connection getConnection() throws SQLException {
        return determineTargetDataSource().getConnection();
}
protected DataSource determineTargetDataSource() {
        Assert.notNull(this.resolvedDataSources, "DataSource router not initialized");
        Object lookupKey = determineCurrentLookupKey();
        DataSource dataSource = this.resolvedDataSources.get(lookupKey);
        if (dataSource == null && (this.lenientFallback || lookupKey == null)) {
            dataSource = this.resolvedDefaultDataSource;
        if (dataSource == null) {
            throw new IllegalStateException("Cannot determine target DataSource for lookup key [" + lookupKey + "]");
        return dataSource;

// 創(chuàng)建DynamicDataSource
        GenericBeanDefinition beanDefinition = new GenericBeanDefinition();
        beanDefinition.setBeanClass(DyncRouteDataSource.class);
        beanDefinition.setSynthetic(true);
        MutablePropertyValues mpv = beanDefinition.getPropertyValues();
        //默認(rèn)數(shù)據(jù)源
        mpv.addPropertyValue("defaultTargetDataSource", defaultDataSource);
        //其他數(shù)據(jù)源
        mpv.addPropertyValue("targetDataSources", targetDataSources);
        //注冊(cè)到spring bean容器中
        registry.registerBeanDefinition("dataSource", beanDefinition);

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, MybatisAutoConfiguration.class })
@Import(DyncDataSourceRegister.class)
@ServletComponentScan
@ComponentScan(basePackages = { "com.happy.springboot.api","com.happy.springboot.service"})
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface TargetDataSource {
    String value();
    // 是否分庫(kù)
    boolean isSharding() default false;
    // 獲取分庫(kù)策略
    String strategy() default "";
}
// 動(dòng)態(tài)數(shù)據(jù)源上下文
public class DyncDataSourceContextHolder {
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();
    public static List<String> dataSourceNames = new ArrayList<String>();
    public static void setDataSource(String dataSourceName) {
        contextHolder.set(dataSourceName);
    }
    public static String getDataSource() {
        return contextHolder.get();
    public static void clearDataSource() {
        contextHolder.remove();
    public static boolean containsDataSource(String dataSourceName) {
        return dataSourceNames.contains(dataSourceName);
/**
 *
 * @author jasoHsu
 * 動(dòng)態(tài)數(shù)據(jù)源在切換，將數(shù)據(jù)源設(shè)置到ThreadLocal對(duì)象中
 */
@Component
@Order(-10)
@Aspect
public class DyncDataSourceInterceptor {
    @Before("@annotation(targetDataSource)")
    public void changeDataSource(JoinPoint point, TargetDataSource targetDataSource) throws Exception {
        String dbIndx = null;
        String targetDataSourceName = targetDataSource.value() + (dbIndx == null ? "" : dbIndx);
        if (DyncDataSourceContextHolder.containsDataSource(targetDataSourceName)) {
            DyncDataSourceContextHolder.setDataSource(targetDataSourceName);
        }
    @After("@annotation(targetDataSource)")
    public void resetDataSource(JoinPoint point, TargetDataSource targetDataSource) {
        DyncDataSourceContextHolder.clearDataSource();
//
public class DyncRouteDataSource extends AbstractRoutingDataSource {
@Override
    protected Object determineCurrentLookupKey() {
        return DyncDataSourceContextHolder.getDataSource();
    public DataSource findTargetDataSource() {
        return this.determineTargetDataSource();

@Resource
    DyncRouteDataSource dynamicRouteDataSource;

    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory getinvestListingSqlSessionFactory() throws Exception {
        String configLocation = "classpath:/conf/mybatis/configuration.xml";
        String mapperLocation = "classpath*:/com/happy/springboot/service/dao/*/*Mapper.xml";
        SqlSessionFactory sqlSessionFactory = createDefaultSqlSessionFactory(dynamicRouteDataSource, configLocation,
                mapperLocation);
        return sqlSessionFactory;
    }
    @Bean(name = "txManager")
    public PlatformTransactionManager txManager() {
        return new DataSourceTransactionManager(dynamicRouteDataSource);

spring:
  dataSource:
    happyboot:
      driverClassName: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/happy_springboot?characterEncoding=utf8&useSSL=true
      username: root
      password: admin
    extdsnames: happyboot01,happyboot02
    happyboot01:
      driverClassName: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/happyboot01?characterEncoding=utf8&useSSL=true
      username: root
      password: admin
    happyboot02:
      driverClassName: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/happyboot02?characterEncoding=utf8&useSSL=true
      username: root
      password: admin

@Service
public class UserExtServiceImpl implements IUserExtService {
    @Autowired
    private UserInfoMapper userInfoMapper;
    @TargetDataSource(value="happyboot01")
    @Override
    public UserInfo getUserBy(Long id) {
        return userInfoMapper.selectByPrimaryKey(id);
    }
}