spring boot 1.x內(nèi)多數(shù)據(jù)源配置方式參考Spring Boot多數(shù)據(jù)源配置與使用沈自，但升級(jí)到2后該配置無效酣倾，以下是自測(cè)可行的配置方式（spring boot版本2.0.6.RELEASE）古拴。

1. application.properties配置

#數(shù)據(jù)源1
spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/test?characterEncoding=utf8
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driverClassName = com.mysql.jdbc.Driver

#數(shù)據(jù)源2
spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/test2?characterEncoding=utf8
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driverClassName = com.mysql.jdbc.Driver

2.第一數(shù)據(jù)源配置

import javax.sql.DataSource;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;

import com.zaxxer.hikari.HikariDataSource;

@Configuration
@EnableJpaRepositories(entityManagerFactoryRef = "primaryEntityManagerFactory",
        transactionManagerRef = "primaryTransactionManager",
        // 此處指定第一數(shù)據(jù)源對(duì)于dao包路徑
        basePackages = "com.onecodespace.codegenerator.business.dao")
public class PrimaryConfig {

    @Bean
    PlatformTransactionManager primaryTransactionManager() {
        return new JpaTransactionManager(primaryEntityManagerFactory().getObject());
    }

    @Bean
    LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
        jpaVendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(primaryDataSource());
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        // 此處指定第一數(shù)據(jù)源對(duì)應(yīng)實(shí)體類包路徑
        factoryBean.setPackagesToScan("com.onecoderspace.codegenerator.business.domain");
        return factoryBean;
    }

//  @Bean
//  @ConfigurationProperties(prefix = "spring.datasource.primary")
//  DataSource primaryDataSource() {
//      return new EmbeddedDatabaseBuilder().
//              setType(EmbeddedDatabaseType.H2).
//              build();
//  }

    @Bean
    @ConfigurationProperties(prefix="spring.datasource.primary")
    public DataSource primaryDataSource() {
        //通過DataSourceBuilder構(gòu)建數(shù)據(jù)源
        return DataSourceBuilder.create().type(HikariDataSource.class).build();
    }
}

3. 第二數(shù)據(jù)源配置

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;

import com.zaxxer.hikari.HikariDataSource;

@Configuration
@EnableJpaRepositories(entityManagerFactoryRef = "secondaryEntityManagerFactory",
        transactionManagerRef = "secondaryTransactionManager",
        // 第二數(shù)據(jù)源對(duì)應(yīng)dao包路徑
        basePackages = "com.onecodespace.codegenerator.schema.dao")
public class SecondaryConfig extends DataSourceAutoConfiguration {

    @Bean
    PlatformTransactionManager secondaryTransactionManager() {
        return new JpaTransactionManager(secondaryEntityManagerFactory().getObject());
    }

    @Bean
    LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
        jpaVendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(secondaryDataSource());
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        // 第二數(shù)據(jù)源對(duì)應(yīng)實(shí)體的包路徑
        factoryBean.setPackagesToScan("com.onecodespace.codegenerator.schema.domain");
        return factoryBean;
    }

    @Bean
    @ConfigurationProperties(prefix="spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        //通過DataSourceBuilder構(gòu)建數(shù)據(jù)源
        return DataSourceBuilder.create().type(HikariDataSource.class).build();
    }

         // 如果使用jdbcTemplate氓润，進(jìn)行如下設(shè)置即可
    @Bean(name = "secondaryJdbcTemplate")
    public JdbcTemplate secondaryJdbcTemplate(
            @Qualifier("secondaryDataSource") DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }

在兩個(gè)數(shù)據(jù)源對(duì)應(yīng)包下創(chuàng)建實(shí)體罢荡、dao憨募、service紧索，運(yùn)行系統(tǒng)測(cè)試，可看到實(shí)體對(duì)應(yīng)表分別在兩個(gè)庫(kù)內(nèi)操作菜谣。