依賴：

 <!-- add by john com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.19</version>
        </dependency>

DruidConfig：

package com.icil.tracking.milestone.service.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import java.sql.SQLException;
import java.util.Properties;

@PropertySource(value 
 
= "classpath:application.properties",ignoreResourceNotFound = true)
@Component
public class DruidConfig {

    private Logger log = LoggerFactory.getLogger(DruidConfig.class);

    @Value("${spring.druid.initialSize}")
    private Integer initialSize;

    @Value("${spring.druid.minIdle}")
    private
 
 Integer minIdle;

    @Value("${spring.druid.maxActive}")
    private Integer maxActive;

    @Value("${spring.druid.maxPoolPreparedStatementPerConnectionSize}")
    private Integer maxPoolPreparedStatementPerConnectionSize;

    @Value("${spring.druid.maxWait}")
    private Long maxWait;

    @Value(
 
"${spring.druid.timeBetweenEvictionRunsMillis}")
    private Long timeBetweenEvictionRunsMillis;

    @Value("${spring.druid.minEvictableIdleTimeMillis}")
    private Long minEvictableIdleTimeMillis;

    @Value("${spring.druid.filters}")
    private String filters;

    @Value("${spring.druid.connectionProperties}")
    private Properties connectionProperties;

    @Value("${spring.druid.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${spring.druid.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${spring.druid.testOnReturn}")
    private boolean testOnReturn;

    @Value("${spring.druid.poolPreparedStatements}")
    private boolean poolPreparedStatements;


    public DruidDataSource druidDataSource(){
        log.info("============= loading druid config ====================");
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setInitialSize(initialSize);
        druidDataSource.setMinIdle(minIdle);
        druidDataSource.setMaxActive(maxActive);
        druidDataSource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
        druidDataSource.setMaxWait(maxWait);
        druidDataSource.setTimeBetweenConnectErrorMillis(timeBetweenEvictionRunsMillis);
        druidDataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        druidDataSource.setConnectProperties(connectionProperties);
        druidDataSource.setTestWhileIdle(testWhileIdle);
        druidDataSource.setTestOnBorrow(testOnBorrow);
        druidDataSource.setTestOnReturn(testOnReturn);
        druidDataSource.setPoolPreparedStatements(poolPreparedStatements);
        try {
            druidDataSource.setFilters(filters);
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return druidDataSource;
    }

    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean<StatViewServlet> registrationBean =
                new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

//        registrationBean.addInitParameter("allow","127.0.0.1"); // 設定白名單
//        registrationBean.addInitParameter("deny","127.0.0.1");  // 設定黑名單,優先順序高於白名單
        //設定控制檯管理使用者
        registrationBean.addInitParameter("loginUsername","root");
        registrationBean.addInitParameter("loginPassword","root");
        //是否可以重置資料
        registrationBean.addInitParameter("resetEnable","false");
        return registrationBean;
    }

    @Bean
    public FilterRegistrationBean statFilter(){
        //建立過濾器
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        //設定過濾器過濾路徑
        filterRegistrationBean.addUrlPatterns("/*");
        //忽略過濾的形式
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }

}

DBGlobalConfig (Global 表)

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "globalEntityManagerFactory",
        transactionManagerRef = "globalTransactionManager",
        basePackages = {"com.sea.milestone.service.repo.dao.global"})
public class DBGlobalConfig {

    @Bean("globalDataSourceProperties")
    @ConfigurationProperties("datasource.global")
    public DataSourceProperties dataSourceProperties() {
        return new DataSourceProperties();
    }

//    @Bean("globalDataSource")
//    public DataSource dataSource(@Qualifier("globalDataSourceProperties") DataSourceProperties dataSourceProperties) {
//        return dataSourceProperties.initializeDataSourceBuilder().build();
//    }

    @Autowired
    private DruidConfig druidConfig;

    @Bean("globalDataSource")
    @ConfigurationProperties("datasource.global")
    public DataSource dataSource(){
        return druidConfig.druidDataSource();
    }

    @Bean("globalEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(
            EntityManagerFactoryBuilder builder, @Qualifier("globalDataSource") DataSource dataSource) {
        return builder
                .dataSource(dataSource)
                .packages("com.sea.milestone.service.repo.po.global")
                .persistenceUnit("global")
                .build();
    }


    @Bean(name = "globalTransactionManager")
    public PlatformTransactionManager transactionManager(
            @Qualifier("globalEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
        JpaTransactionManager manager = new JpaTransactionManager(entityManagerFactory);
        manager.setGlobalRollbackOnParticipationFailure(false);
        return manager;
    }

}

application.properties

datasource.global.url = jdbc:mysql://icilaws-rds-afsa2-t03.cav2qntehphf.ap-southeast-1.rds.amazonaws.com/Global?autoReconnect=true&useSSL=false
datasource.global.username = root
datasource.global.password = ACahlofh
datasource.global.driver-class-name = com.mysql.jdbc.Driver


spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.properties.hibernate.generate_statistics = true
spring.jpa.show-sql = true
spring.jpa.properties.hibernate.format_sql = true

##common druid
spring.druid.initialSize = 5
spring.druid.minIdle = 5
spring.druid.maxActive = 20
spring.druid.maxWait = 60000
spring.druid.timeBetweenEvictionRunsMillis = 60000
spring.druid.minEvictableIdleTimeMillis = 300000
#spring.druid.validationQuery=SELECT 1 FROM DUAL            #測試連線
spring.druid.testWhileIdle = true
spring.druid.testOnBorrow = false
spring.druid.testOnReturn = false
spring.druid.poolPreparedStatements = false
spring.druid.maxPoolPreparedStatementPerConnectionSize = 20
spring.druid.filters = stat,wall,log4j
spring.druid.connectionProperties = 'druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000'