SpringBoot 版本为1.5.10.RELEASE，Mybatis plus 版本为2.1.8。
第一步：填写配置信息：
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spring: aop: proxy-target-class: true auto: true datasource: druid: # 数据库 1 db1: url: jdbc:mysql://localhost:3306/db1?useUnicode=true&characterEncoding=utf8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true username: root password: root driver-class-name: com.mysql.jdbc.Driver initialSize: 5 minIdle: 5 maxActive: 20 # 数据库 2 db2: url: jdbc:mysql://localhost:3306/db2?useUnicode=true&characterEncoding=utf8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true username: root password: root driver-class-name: com.mysql.jdbc.Driver initialSize: 5 minIdle: 5 maxActive: 20 |
第二步： 数据源配置：
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@Configuration@MapperScan({"com.warm.system.mapper*"})public class MybatisPlusConfig { /** * mybatis-plus分页插件<br> * 文档：http://mp.baomidou.com<br> */ @Bean public PaginationInterceptor paginationInterceptor() { PaginationInterceptor paginationInterceptor = new PaginationInterceptor(); //paginationInterceptor.setLocalPage(true);// 开启 PageHelper 的支持 return paginationInterceptor; } /** * mybatis-plus SQL执行效率插件【生产环境可以关闭】 */ @Bean public PerformanceInterceptor performanceInterceptor() { return new PerformanceInterceptor(); } @Bean(name = "db1") @ConfigurationProperties(prefix = "spring.datasource.druid.db1" ) public DataSource db1 () { return DruidDataSourceBuilder.create().build(); } @Bean(name = "db2") @ConfigurationProperties(prefix = "spring.datasource.druid.db2" ) public DataSource db2 () { return DruidDataSourceBuilder.create().build(); } /** * 动态数据源配置 * @return */ @Bean @Primary public DataSource multipleDataSource (@Qualifier("db1") DataSource db1, @Qualifier("db2") DataSource db2 ) { DynamicDataSource dynamicDataSource = new DynamicDataSource(); Map< Object, Object > targetDataSources = new HashMap<>(); targetDataSources.put(DBTypeEnum.db1.getValue(), db1 ); targetDataSources.put(DBTypeEnum.db2.getValue(), db2); dynamicDataSource.setTargetDataSources(targetDataSources); dynamicDataSource.setDefaultTargetDataSource(db1); return dynamicDataSource; } @Bean("sqlSessionFactory") public SqlSessionFactory sqlSessionFactory() throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean(); sqlSessionFactory.setDataSource(multipleDataSource(db1(),db2())); //sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/mapper/*/*Mapper.xml")); MybatisConfiguration configuration = new MybatisConfiguration(); //configuration.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class); configuration.setJdbcTypeForNull(JdbcType.NULL); configuration.setMapUnderscoreToCamelCase(true); configuration.setCacheEnabled(false); sqlSessionFactory.setConfiguration(configuration); sqlSessionFactory.setPlugins(new Interceptor[]{ //PerformanceInterceptor(),OptimisticLockerInterceptor() paginationInterceptor() //添加分页功能 }); sqlSessionFactory.setGlobalConfig(globalConfiguration()); return sqlSessionFactory.getObject(); } @Bean public GlobalConfiguration globalConfiguration() { GlobalConfiguration conf = new GlobalConfiguration(new LogicSqlInjector()); conf.setLogicDeleteValue("-1"); conf.setLogicNotDeleteValue("1"); conf.setIdType(0); conf.setMetaObjectHandler(new MyMetaObjectHandler()); conf.setDbColumnUnderline(true); conf.setRefresh(true); return conf; }} |
第三步：利用AOP进行数据源的动态切换：
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@Component@Aspect@Order(-100) //这是为了保证AOP在事务注解之前生效,Order的值越小,优先级越高@Slf4jpublic class DataSourceSwitchAspect { @Pointcut("execution(* com.warm.system.service.db1..*.*(..))") private void db1Aspect() { } @Pointcut("execution(* com.warm.system.service.db2..*.*(..))") private void db2Aspect() { } @Before( "db1Aspect()" ) public void db1() { log.info("切换到db1 数据源..."); DbContextHolder.setDbType(DBTypeEnum.db1); } @Before("db2Aspect()" ) public void db2 () { log.info("切换到db2 数据源..."); DbContextHolder.setDbType(DBTypeEnum.db2); }}public class DbContextHolder { private static final ThreadLocal contextHolder = new ThreadLocal<>(); /** * 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(); }}public enum DBTypeEnum { db1("db1"), db2("db2"); private String value; DBTypeEnum(String value) { this.value = value; } public String getValue() { return value; }}public class DynamicDataSource extends AbstractRoutingDataSource { /** * 取得当前使用哪个数据源 * @return */ @Override protected Object determineCurrentLookupKey() { return DbContextHolder.getDbType(); }} |
OK！写个单元测试来验证一下：
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@SpringBootTest@RunWith(SpringJUnit4ClassRunner.class)public class DataTest { @Autowired private UserService userService; @Autowired private OrderService orderService; @Test public void test() { userService.getUserList().stream().forEach(item -> System.out.println(item)); orderService.getOrderList().stream().forEach(item -> System.out.println(item)); }} |
如图所示，证明数据源能动态切换了。
具体项目结构和代码参考Github。
踩坑记录：
直接调用Mybatis plus 的service方法AOP不会生效，即数据源不会动态切换，解决方法：在自己的service层中封装一下，调用自定义的service方法AOP即能正常生效了，如下所示：
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@Servicepublic class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService { @Override public List<User> getUserList() { return selectList(null); }} |
application.yml 定义的mybatis plus 配置信息不生效，如：
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#MyBatismybatis-plus: mapper-locations: classpath:/mapper/*/*Mapper.xml #实体扫描，多个package用逗号或者分号分隔 typeAliasesPackage: com.jinhuatuo.edu.sys.entity global-config: #主键类型 0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID"; id-type: 0 #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断" field-strategy: 2 #驼峰下划线转换 db-column-underline: true #刷新mapper 调试神器 refresh-mapper: true #数据库大写下划线转换 #capital-mode: true #序列接口实现类配置 #key-generator: com.baomidou.springboot.xxx #逻辑删除配置 #logic-delete-value: 0 #logic-not-delete-value: 1 #自定义填充策略接口实现 meta-object-handler: com.jinhuatuo.edu.config.mybatis.MyMetaObjectHandler #自定义SQL注入器 #sql-injector: com.baomidou.springboot.xxx configuration: map-underscore-to-camel-case: true cache-enabled: false |
解决方法： 所有这些配置在MybatisPlusConfig 类中用代码的方式进行配置，分页插件亦是如此，否则统计列表总数的数据会拿不到，参考代码即可。
在application.yml配置
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logging: level: debug |
控制台也不会打印Mybatis 执行的SQL语句，解决方法：自定义日志输出方案，如在classpath下直接引入日志配置文件如logback-spring.xml即可，同时application.yml无需再配置日志信息。
logback-spring.xml配置参考：
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<?xml version="1.0" encoding="UTF-8"?><!-- scan:配置文件如果发生改变，将会重新加载，默认值为true --><configuration scan="true" scanPeriod="10 seconds"> <!-- <include resource="org/springframework/boot/logging/logback/base.xml"/> --> <!-- 日志文件路径 --> <!-- <springProperty name="logFilePath" source="logging.path"/> --> <property resource="application.yml" /> <substitutionProperty name="LOG_HOME" value="${logging.path}" /> <substitutionProperty name="PROJECT_NAME" value="${spring.application.name}" /> <!--<substitutionProperty name="CUR_NODE" value="${info.node}" />--> <!-- 日志数据库路径 --> <!-- <springProperty name="logDbPath" source="spring.datasource.one.url"/> <springProperty name="logDbDriver" source="spring.datasource.one.driver-class-name"/> <springProperty name="logDbUser" source="spring.datasource.one.username"/> <springProperty name="logDbPwd" source="spring.datasource.one.password"/> --> <!-- 将日志文件 --> <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <append>true</append> <encoder> <pattern> [ %-5level] [%date{yyyy-MM-dd HH:mm:ss}] %logger{96} [%line] - %msg%n </pattern> <charset>utf-8</charset> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${LOG_HOME}/${PROJECT_NAME}-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>50 MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <!--最多保留30天log--> <maxHistory>30</maxHistory> </rollingPolicy> </appender> <!-- 将日志错误文件--> <appender name="file_error" class="ch.qos.logback.core.rolling.RollingFileAppender"> <append>true</append> <encoder> <pattern> [ %-5level] [%date{yyyy-MM-dd HH:mm:ss}] %logger{96} [%line] - %msg%n </pattern> <charset>utf-8</charset> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${LOG_HOME}/${PROJECT_NAME}-error-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>50 MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <!--最多保留30天log--> <maxHistory>30</maxHistory> </rollingPolicy> <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>ERROR</level> <!-- <onMatch>ACCEPT</onMatch> <onMismatch>DENY </onMismatch> --> </filter> </appender> <!-- 将日志写入控制台 --> <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern> [ %-5level] [%date{yyyy-MM-dd HH:mm:ss}] %logger{96} [%line] - %msg%n </pattern> <!--<charset>utf-8</charset>--> </encoder> </appender> <!-- 将日志写入数据库 --> <!-- <appender name="DB-CLASSIC-MYSQL-POOL" class="ch.qos.logback.classic.db.DBAppender"> <connectionSource class="ch.qos.logback.core.db.DataSourceConnectionSource"> <dataSource class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <driverClassName>${logDbDriver}</driverClassName> <url>${logDbPath}</url> <username>${logDbUser}</username> <password>${logDbPwd}</password> </dataSource> </connectionSource> </appender> --> <!-- spring扩展，分环境配置log信息 --> <springProfile name="dev"> <!-- <logger name="sand.dao" level="DEBUG"/> --> <!-- <logger name="org.springframework.web" level="INFO"/> --> <logger name="org.springboot.sample" level="TRACE" /> <logger name="org.springframework.cloud" level="INFO" /> <logger name="com.netflix" level="INFO"></logger> <logger name="org.springframework.boot" level="INFO"></logger> <logger name="org.springframework.web" level="INFO"/> <logger name="jdbc.sqltiming" level="debug"/> <logger name="com.ibatis" level="debug" /> <logger name="com.ibatis.common.jdbc.SimpleDataSource" level="debug" /> <logger name="com.ibatis.common.jdbc.ScriptRunner" level="debug" /> <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" level="debug" /> <logger name="java.sql.Connection" level="debug" /> <logger name="java.sql.Statement" level="debug" /> <logger name="java.sql.PreparedStatement" level="debug" /> <logger name="java.sql.ResultSet" level="debug" /> <logger name="com.warm" level="debug"/> <root level="DEBUG"> <appender-ref ref="console" /> <appender-ref ref="file" /> </root> <root level="ERROR"> <appender-ref ref="file_error" /> <!-- <appender-ref ref="DB-CLASSIC-MYSQL-POOL" /> --> </root> </springProfile> <springProfile name="test"> <logger name="org.springboot.sample" level="TRACE" /> <logger name="org.springframework.cloud" level="INFO" /> <logger name="com.netflix" level="INFO"></logger> <logger name="org.springframework.boot" level="INFO"></logger> <logger name="org.springframework.web" level="INFO"/> <logger name="jdbc.sqltiming" level="debug"/> <logger name="com.ibatis" level="debug" /> <logger name="com.ibatis.common.jdbc.SimpleDataSource" level="debug" /> <logger name="com.ibatis.common.jdbc.ScriptRunner" level="debug" /> <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" level="debug" /> <logger name="java.sql.Connection" level="debug" /> <logger name="java.sql.Statement" level="debug" /> <logger name="java.sql.PreparedStatement" level="debug" /> <logger name="java.sql.ResultSet" level="debug" /> <logger name="com.warm" level="DEBUG"/> <root level="DEBUG"> <!-- <appender-ref ref="console" /> --> <appender-ref ref="file" /> </root> <root level="ERROR"> <appender-ref ref="file_error" /> <!-- <appender-ref ref="DB-CLASSIC-MYSQL-POOL" /> --> </root> </springProfile> <springProfile name="prod"> <logger name="org.springboot.sample" level="TRACE" /> <logger name="org.springframework.cloud" level="INFO" /> <logger name="com.netflix" level="INFO"></logger> <logger name="org.springframework.boot" level="INFO"></logger> <logger name="org.springframework.web" level="INFO"/> <logger name="jdbc.sqltiming" level="debug"/> <logger name="com.ibatis" level="debug" /> <logger name="com.ibatis.common.jdbc.SimpleDataSource" level="debug" /> <logger name="com.ibatis.common.jdbc.ScriptRunner" level="debug" /> <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" level="debug" /> <logger name="java.sql.Connection" level="debug" /> <logger name="java.sql.Statement" level="debug" /> <logger name="java.sql.PreparedStatement" level="debug" /> <logger name="java.sql.ResultSet" level="debug" /> <logger name="com.warm" level="info"/> <root level="DEBUG"> <!-- <appender-ref ref="console" /> --> <appender-ref ref="file" /> </root> <root level="ERROR"> <appender-ref ref="file_error" /> <!-- <appender-ref ref="DB-CLASSIC-MYSQL-POOL" /> --> </root> </springProfile></configuration> |
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原文链接：https://blog.csdn.net/u012075383/article/details/79304178
