spring-boot 项目配置多数据源

多数据源配置文件修改

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
datasource.running.databaseName=数据名1
datasource.his.databaseName=数据名2
spring.datasource.druid.running.url=jdbc:mysql://127.0.0.1:3306/${datasource.running.databaseName}?autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8&useSSL=false&rewriteBatchedStatements=true&serverTimezone=Asia/Shanghai#spring.datasource.url=jdbc:mysql://127.0.0.1:3306/${datasource.databaseName}?autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8&useSSL=false&rewriteBatchedStatements=true&serverTimezone=UTC
spring.datasource.druid.running.username=账号
spring.datasource.druid.running.password=密码
spring.datasource.druid.running.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.running.max-idle=10
spring.datasource.druid.running.max-wait=10000
spring.datasource.druid.running.min-idle=5
spring.datasource.druid.running.initial-size=5
spring.datasource.druid.his.url=jdbc:mysql://127.0.0.1:3306/${datasource.his.databaseName}?autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8&useSSL=false&rewriteBatchedStatements=true&serverTimezone=Asia/Shanghai#spring.datasource.url=jdbc:mysql://127.0.0.1:3306/${datasource.databaseName}?autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8&useSSL=false&rewriteBatchedStatements=true&serverTimezone=UTC
spring.datasource.druid.his.username=账号
spring.datasource.druid.his.password=密码
spring.datasource.druid.his.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.his.max-idle=10
spring.datasource.druid.his.max-wait=10000
spring.datasource.druid.his.min-idle=5
spring.datasource.druid.his.initial-size=5

数据源切换工具类

package com.samples.common.config;

/**
 * 数据源切换工具类
 */
public class DataSourceContextHolder {

    private static final ThreadLocal contextHolder = new ThreadLocal<String>();

    /**
     * 设置数据源
     *
     * @param dbTypeEnum
     */
    public static void setDbType(DBTypeEnum dbTypeEnum) {
        contextHolder.set(dbTypeEnum.getValue());
    }

    /**
     * 取得当前数据源
     *
     * @return
     */
    public static String getDbType() {
        return (String) contextHolder.get();
    }

    /**
     * 清除上下文数据
     */
    public static void clearDbType() {
        contextHolder.remove();
    }
}

多个数据库的枚举

package com.samples.common.config;

public enum DBTypeEnum {
    running("running"), his("his");
    private String value;

    DBTypeEnum(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }
}

comfig类修改

@EnableTransactionManagement
@Configuration
@MapperScan({"com.samples.web.mapper"})
public class MybatisPlusConfig {

    
    @Bean(name = "his")
    @ConfigurationProperties(prefix = "spring.datasource.druid.his")
    public DataSource his() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean(name = "running")
    @ConfigurationProperties(prefix = "spring.datasource.druid.running")
    public DataSource running() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    @Primary
    public DataSource multipleDataSource(@Qualifier("running") DataSource running,
                                         @Qualifier("his") DataSource his) {
        DynamicDataSource dynamicDataSource = new DynamicDataSource();
        Map<Object, Object> targetDataSources = new HashMap<>();
        targetDataSources.put(DBTypeEnum.running.getValue(), running);
        targetDataSources.put(DBTypeEnum.his.getValue(), his);
        dynamicDataSource.setTargetDataSources(targetDataSources);
        dynamicDataSource.setDefaultTargetDataSource(running);
        return dynamicDataSource;
    }

}

@Slf4j
public class DynamicDataSource extends AbstractRoutingDataSource {
    @Override
    protected Object determineCurrentLookupKey() {
        String datasource = DataSourceContextHolder.getDbType();
        return datasource;
    }
}