前面部分是網上找的，我按照網上寫的把自己搭建的過程展示一次
1.引入依賴
目前項目本來使用到了Mybatis plus（在自己的Mapper接口中繼承BaseMapper獲得基本的CRUD，而不需要增加MapperXML配置） 所以已經引入了依賴，同時使用到Druid和Atomikos，因此依賴如下
<dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.9</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jta-atomikos</artifactId> </dependency> <!-- mybatis-plus --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.0.7.1</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.0.7.1</version> </dependency>
2. 修改配置文件application.properties配置數據源屬性配置,如果使用profiles，則去當前active中進行配置
spring.datasource.system.xa-properties.url=jdbc:mysql://localhost:3306/easyweb-shiro?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&rewriteBatchedStatements=true spring.datasource.system.xa-properties.username=root spring.datasource.system.xa-properties.password=x5 spring.datasource.system.xa-data-source-class-name=com.alibaba.druid.pool.xa.DruidXADataSource spring.datasource.system.unique-resource-name=systemDataSource
其中spring.datasource.system是安全屬性的前綴，可以自行命名
3.在SpringBoot入口類所能掃描到的路徑下增加配置類（多個數據源就增加多套配置Bean）
package com.wf.ew.common.config.datasource; import javax.sql.DataSource; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import com.atomikos.jdbc.AtomikosDataSourceBean; @Configuration @MapperScan(basePackages = "com.wf.ew.system.dao", sqlSessionTemplateRef = "systemSqlSessionTemplate") // 指定Mapper接口類包使用的sqlSession public class SystemConfig { @Bean(name="systemDataSource") @Primary @ConfigurationProperties(prefix = "spring.datasource.system") // 安全屬性前綴 public DataSource dataSource() { AtomikosDataSourceBean datasource = new AtomikosDataSourceBean(); System.out.println(datasource); return datasource; } @Bean(name="systemSqlSessionFactory") @Primary public SqlSessionFactory sqlSessionFactory(@Qualifier("systemDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/**/*Mapper.xml"));// 掃描指定目錄的xml return bean.getObject(); } @Bean(name="systemTransactionManager") @Primary public DataSourceTransactionManager transactionManager(@Qualifier("systemDataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name="systemSqlSessionTemplate") @Primary public SqlSessionTemplate sqlSessionTemplate(@Qualifier("systemSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
4. 配置分布式事務
package com.wf.ew.common.config.datasource; import javax.transaction.TransactionManager; import javax.transaction.UserTransaction; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.DependsOn; import org.springframework.transaction.PlatformTransactionManager; import org.springframework.transaction.jta.JtaTransactionManager; import com.atomikos.icatch.jta.UserTransactionImp; import com.atomikos.icatch.jta.UserTransactionManager; @Configuration public class TransactionManagerConfig { @Bean public UserTransaction userTransaction() throws Throwable { UserTransactionImp userTransactionImp = new UserTransactionImp(); userTransactionImp.setTransactionTimeout(10000); return userTransactionImp; } @Bean public TransactionManager atomikosTransactionManager() throws Throwable { UserTransactionManager userTransactionManager = new UserTransactionManager(); userTransactionManager.setForceShutdown(false); return userTransactionManager; } @Bean @DependsOn({ "userTransaction", "atomikosTransactionManager" }) public PlatformTransactionManager transactionManager() throws Throwable { JtaTransactionManager manager = new JtaTransactionManager(userTransaction(), atomikosTransactionManager()); return manager; } }
5.使用事務時，可以采用以下方式來選擇使用不同的事務
@Transactional("transactionManager")
transactionManager為分布式事務，systemTransactionManager為數據源事務，名字參考Bean命名
以上為按照別人帖子進行的配置，但當我運行時候報錯
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.wf.ew.system.dao.LoginRecordMapper.insert at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:227) at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:49) at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:65) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58) at com.sun.proxy.$Proxy164.insert(Unknown Source) at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.save(ServiceImpl.java:105) at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$76535273.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:72) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689) at com.wf.ew.system.service.impl.LoginRecordServiceImpl$$EnhancerBySpringCGLIB$$ad70ce8c.save(<generated>) at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$76535273.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:72) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689) at com.wf.ew.system.service.impl.LoginRecordServiceImpl$$EnhancerBySpringCGLIB$$5843731c.save(<generated>) at com.wf.ew.system.controller.MainController.addLoginRecord(MainController.java:167) at com.wf.ew.system.controller.MainController.doLogin(MainController.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877) at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)
大致意思就是在MapperXML里找不到LoginRecordMapper.insert
因為insert是通過繼承BaseMapper得到的，因此實際上LoginRecordMapper.XML里面是沒有id=insert的配置的；解決的方法就是配置session工廠時采用MybatisSqlSessionFactoryBean，而不是SqlSessionFactoryBean
@Bean(name="systemSqlSessionFactory") @Primary public SqlSessionFactory sqlSessionFactory(@Qualifier("systemDataSource") DataSource dataSource) throws Exception { //SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/**/*Mapper.xml"));// 掃描指定目錄的xml return bean.getObject(); }
紅色部分為修改后的，注釋為修改前的。
至此分布式數據源就弄好了，雖然還沒來得及測試，但是配置上多數據源之后，能跟以前沒配置的一樣能登陸進行系統了。
總結：
當發現錯誤描述有點莫名其妙的時候（明明接口沒有insert，所以xml也不需要寫insert），看看是不是繼承了什么類，去查看一下父類的代碼；當看到父類是包含一堆方法的時候，我還想過怎么除了掃描自己的xml還怎么增加別的地方的xml，在查找BaseMapper說明的過程中，找到了更改session工廠的解決方法。