SpringCloud + MyBatis Plus + Druid + dynamic-datasource 多資料來源配置
阿新 • • 發佈:2020-11-19
上下文:
SpringCloud:Greenwich.SR2
Spring-boot : 2.1.7.RELEASE
Spring:5.1.9.RELEASE
依賴:
<!--DB start--> <!--多資料來源依賴--> <dependency> <groupId>com.baomidou</groupId> <artifactId>dynamic-datasource-spring-boot-starter</artifactId> <version>3.2.1</version> </dependency> <!--mybatis-plus依賴--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.1</version> </dependency> <!--MySQL依賴 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.22</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency> <!--程式碼生成start--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.4.1</version> <scope>compile</scope> <optional>true</optional> </dependency> <!-- 模板引擎start --> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity-engine-core</artifactId> <version>2.2</version> <scope>compile</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> <scope>compile</scope> <optional>true</optional> </dependency> <!-- 模板引擎end --> <!--程式碼生成end--> <!--DB end-->
配置檔案application.yml
spring: autoconfigure: #自動化配置 例外處理 exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure # dynamic-datasource-spring-boot-starter 動態資料來源的配置內容 datasource: type: com.alibaba.druid.pool.DruidDataSource dynamic: primary: test # 設定預設的資料來源或者資料來源組,預設值即為 master datasource: # test 資料來源配置 test: url: jdbc:mysql://192.168.1.120:3306/db_test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root1234 # test1 資料來源配置 test1: url: jdbc:mysql://192.168.1.120:3306/db_test1?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root1234 # test2 資料來源配置 test2: url: jdbc:mysql://192.168.1.120:3306/db_test2?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root1234 #dynamic - 公共配置 druid: initialSize: 5 minIdle: 5 maxActive: 30 maxWait: 60000 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: SELECT 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxPoolPreparedStatementPerConnectionSize: 20 filters: stat,wall,slf4j,config useGlobalDataSourceStat: true stat: log-slow-sql: true merge-sql: true slow-sql-millis: 10000 mybatis-plus: type-aliases-package: com.* mapper-locations: classpath*:mapper/*.xml
如果沒有設定上文紅色部分配置,請在啟動類的 SpringBootApplication 註解上加入過濾配置:
@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
不加過濾的話,SpringBoo t會自動檢測到啟動了database模組,會報如下問題:
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/alibaba/druid/spring/boot/autoconfigure/DruidDataSourceAutoConfigure.class]: Invocation of init method failed; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1467)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1431)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1350)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1209)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)
... 117 common frames omitted
Caused by: org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineDriverClassName(DataSourceProperties.java:233)
at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineUsername(DataSourceProperties.java:327)
at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceWrapper.afterPropertiesSet(DruidDataSourceWrapper.java:40)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774)
... 131 common frames omitted
2020-11-19 15:34:16.885[main]|INFO|org.eclipse.jetty.server.handler.ContextHandler - Stopped o.s.b.w.e.j.JettyEmbeddedWebAppContext@455d04d2{application,/,[file:///C:/Users/Administrator.USER-20190109GW/AppData/Local/Temp/jetty-docbase.2008797717949458032.12394/, jar:file:/D:/Server/maven/repository/io/springfox/springfox-swagger-ui/2.9.2/springfox-swagger-ui-2.9.2.jar!/META-INF/resources],UNAVAILABLE}
2020-11-19 15:34:16.886[main]|WARN|o.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Jetty web server
2020-11-19 15:34:16.901[main]|INFO|o.s.b.a.l.ConditionEvaluationReportLoggingListener -
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-11-19 15:34:16.905[main]|ERROR|o.s.b.diagnostics.LoggingFailureAnalysisReporter -
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
Disconnected from the target VM, address: '127.0.0.1:14992', transport: 'socket'
Process finished with exit code 1
用法:在service實現層 或者 方法上 添加註解@DS("你的db key"),選定資料來源,如:
@DS("test") @Service("userService") public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService { }