一、背景
使用spring boot配置多数据源,数据源分别为postgresql、mysql
二、版本介绍
- spring boot——2.5.4
- druid——1.2.11
- postgresql——12
- mysql——8.0.16
- maven——3.0
- idea——2019
三、项目结构
java package目录
resource目录存放mapper.xml文件,按照数据源创建package
四、maven依赖
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< dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-data-jpa</ artifactId > </ dependency > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-test</ artifactId > < scope >test</ scope > </ dependency > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-web</ artifactId > </ dependency > <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> < dependency > < groupId >com.alibaba</ groupId > < artifactId >fastjson</ artifactId > < version >2.0.4</ version > </ dependency > <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter --> < dependency > < groupId >com.alibaba</ groupId > < artifactId >druid-spring-boot-starter</ artifactId > < version >1.2.11</ version > </ dependency > < dependency > < groupId >org.mybatis.spring.boot</ groupId > < artifactId >mybatis-spring-boot-starter</ artifactId > < version >1.3.2</ version > </ dependency > < dependency > < groupId >org.postgresql</ groupId > < artifactId >postgresql</ artifactId > < scope >runtime</ scope > </ dependency > <!-- MySql驱动 --> < dependency > < groupId >mysql</ groupId > < artifactId >mysql-connector-java</ artifactId > </ dependency > |
五、yaml配置文件
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server: port: 8081 spring: datasource: type: com.alibaba.druid.pool.DruidDataSource druid: web-stat-filter: enabled: true #是否启用StatFilter默认值true url-pattern: /* exclusions: /druid/* , *.js , *.gif , *.jpg , *.bmp , *.png , *.css , *.ico session-stat-enable: true session-stat-max-count: 10 stat-view-servlet: enabled: true #是否启用StatViewServlet默认值true url-pattern: /druid/* reset-enable: true login-username: admin login-password: admin allow: db1: username: postgres password: localhost url: jdbc : postgresql : //localhost : 5432/test driver-class-name: org.postgresql.Driver initial-size: 5 # 初始化大小 min-idle: 5 # 最小 max-active: 100 # 最大 max-wait: 60000 # 配置获取连接等待超时的时间 validation-query: select version() time-between-eviction-runs-millis: 60000 # 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 min-evictable-idle-time-millis: 300000 # 指定一个空闲连接最少空闲多久后可被清除,单位是毫秒 filters: config , wall , stat # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙 # 通过connectProperties属性来打开mergeSql功能;慢SQL记录 connectionProperties: druid.stat.slowSqlMillis=200;druid.stat.logSlowSql= true ;config.decrypt= false test-while-idle: true test-on-borrow: true test-on-return: false # 是否缓存preparedStatement,也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 db2: username: root password: localhost url: jdbc : mysql : //localhost : 3306/springboot?characterEncoding=utf8&useUnicode= true &useSSL= false &serverTimezone=Asia/Shanghai driver-class-name: com.mysql.cj.jdbc.Driver initial-size: 5 # 初始化大小 min-idle: 5 # 最小 max-active: 100 # 最大 max-wait: 60000 # 配置获取连接等待超时的时间 validation-query: select 'x' time-between-eviction-runs-millis: 60000 # 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 min-evictable-idle-time-millis: 300000 # 指定一个空闲连接最少空闲多久后可被清除,单位是毫秒 filters: config , wall , stat # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙 # 通过connectProperties属性来打开mergeSql功能;慢SQL记录 connectionProperties: druid.stat.slowSqlMillis=200;druid.stat.logSlowSql= true ;config.decrypt= false test-while-idle: true test-on-borrow: true test-on-return: false # 是否缓存preparedStatement,也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 mybatis: mapper-locations: classpath : com/demo/mapper/*.xml type-aliases-package: com.demo.entity configuration: log-impl: mapUnderscoreToCamelCase: true #showSql logging: level: java.sql: debug org.apache.ibatis: debug com.demo.mapper: debug config: classpath : logback-spring.xml |
六、数据源配置文件
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@Configuration @MapperScan (basePackages = "com.demo.mapper.postgre.**" , sqlSessionFactoryRef = "oneSqlSessionFactory" ) public class DataSourceConfig1 { // 将这个对象放入Spring容器中 @Bean (name = "oneDataSource" ) // 表示这个数据源是默认数据源 @Primary // 读取application.properties中的配置参数映射成为一个对象 // prefix表示参数的前缀 @ConfigurationProperties (prefix = "spring.datasource.druid.db1" ) public DataSource getDateSource1() { return DataSourceBuilder.create().type(DruidDataSource. class ).build(); } @Bean (name = "oneSqlSessionFactory" ) // 表示这个数据源是默认数据源 @Primary // @Qualifier表示查找Spring容器中名字为oneDataSource的对象 public SqlSessionFactory oneSqlSessionFactory( @Qualifier ( "oneDataSource" ) DataSource datasource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(datasource); bean.setMapperLocations( // 设置mybatis的xml所在位置 new PathMatchingResourcePatternResolver().getResources( "classpath*:com.demo.mapper.postgre/*.xml" )); return bean.getObject(); } @Bean ( "oneSqlSessionTemplate" ) // 表示这个数据源是默认数据源 @Primary public SqlSessionTemplate oneSqlSessionTemplate( @Qualifier ( "oneSqlSessionFactory" ) SqlSessionFactory sessionFactory) { return new SqlSessionTemplate(sessionFactory); } } |
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@Configuration @MapperScan (basePackages = "com.demo.mapper.mysql" , sqlSessionFactoryRef = "twoSqlSessionFactory" ) public class DataSourceConfig2 { // 将这个对象放入Spring容器中 @Bean (name = "twoDataSource" ) // 读取application.properties中的配置参数映射成为一个对象 // prefix表示参数的前缀 @ConfigurationProperties (prefix = "spring.datasource.druid.db2" ) public DataSource getDateSource1() { return DataSourceBuilder.create().type(DruidDataSource. class ).build(); } @Bean (name = "twoSqlSessionFactory" ) // 表示这个数据源是默认数据源 //@Primary // @Qualifier表示查找Spring容器中名字为oneDataSource的对象 public SqlSessionFactory oneSqlSessionFactory( @Qualifier ( "twoDataSource" ) DataSource datasource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(datasource); bean.setMapperLocations( // 设置mybatis的xml所在位置 new PathMatchingResourcePatternResolver().getResources( "classpath*:com.demo.mapper.mysql/*.xml" )); return bean.getObject(); } @Bean ( "twoSqlSessionTemplate" ) // 表示这个数据源是默认数据源 //@Primary public SqlSessionTemplate oneSqlSessionTemplate( @Qualifier ( "twoSqlSessionFactory" ) SqlSessionFactory sessionFactory) { return new SqlSessionTemplate(sessionFactory); } } |
七、启动类配置
关键点:去除 exclude = {DataSourceAutoConfiguration.class} 及扫描 com.demo.mapper目录
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@MapperScan ( "com.demo.mapper" ) @SpringBootApplication (exclude = {DataSourceAutoConfiguration. class }) public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication . class , args); } } |
八、druid管理页面
输入地址 localhost://8081/druid,输入 admin/admin
总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/xrq1995/article/details/126231539