Spring boot 加Mybatis加dubble多数据源配置

Spring boot 整合Mybatis+dubble +maven单数据源的例子很多，但是多数据源配置需要将原本封装好的重写一遍，有点麻烦，对框架的理解要求比较高，

在这详细给大家介绍下如何配置使用：

单数据源的配置，有Mybatis和Spring boot 整合的jar包，在pom引入一下依赖transaction和datasource都是Spring自动配置的，但是如果是使用多数据源，就要分开重写，也就是说，第一个数据源和第二个都要重写并指定默认初始数据源；

我这里写的一个是mysql一个是Oracle，都是远程连接，

我这边采用的是路径分离的方法区分数据源，配置文件和Java代码都做了新的路径，方便映射，适合菜鸟使用；

1.首先，Spring boot扫描路径是固定的，所以我们加的第二数据源路径命名必须符合Spring boot的规范，

2.配置文件中，事务配置和拦截器配置都要分开写

spring-aop-transaction.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsdhttp://www.springframework.org/schema/tx  http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"default-autowire="byName" default-lazy-init="false"><!-- 需要事务拦截的路径 --><aop:config proxy-target-class="true"><aop:advisor pointcut="execution( * com.ai.rai.interests.*.service.impl.*.*(..))"advice-ref="oracleTxAdvice"/></aop:config><tx:advice id="oracleTxAdvice"><tx:attributes><tx:method name="select*" read-only="true" propagation="SUPPORTS" /><tx:method name="list*" read-only="true" propagation="SUPPORTS" /><tx:method name="query*" read-only="true" propagation="SUPPORTS" /><tx:method name="get*" read-only="true" propagation="SUPPORTS" /><tx:method name="detail*" read-only="true" propagation="SUPPORTS" /><tx:method name="count*" read-only="true" propagation="SUPPORTS" /><tx:method name="insert*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="update*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="delete*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="save*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="newTran*" read-only="false" propagation="REQUIRES_NEW" rollback-for="Throwable" /><tx:method name="xaTran*" read-only="false" propagation="REQUIRED" isolation="SERIALIZABLE" rollback-for="Throwable" /><tx:method name="*" timeout="30" /></tx:attributes></tx:advice></beans>

spring-aop-transaction-oracle.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsdhttp://www.springframework.org/schema/tx  http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"default-autowire="byName" default-lazy-init="false"><!-- 需要事务拦截的路径 --><aop:config proxy-target-class="true"><aop:advisor pointcut="execution( * com.ai.rai.interests.*.service.impl.*.*(..))"advice-ref="oracleTxAdvice"/></aop:config><tx:advice id="oracleTxAdvice"><tx:attributes><tx:method name="select*" read-only="true" propagation="SUPPORTS" /><tx:method name="list*" read-only="true" propagation="SUPPORTS" /><tx:method name="query*" read-only="true" propagation="SUPPORTS" /><tx:method name="get*" read-only="true" propagation="SUPPORTS" /><tx:method name="detail*" read-only="true" propagation="SUPPORTS" /><tx:method name="count*" read-only="true" propagation="SUPPORTS" /><tx:method name="insert*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="update*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="delete*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="save*" read-only="false" propagation="REQUIRED" rollback-for="Throwable" /><tx:method name="newTran*" read-only="false" propagation="REQUIRES_NEW" rollback-for="Throwable" /><tx:method name="xaTran*" read-only="false" propagation="REQUIRED" isolation="SERIALIZABLE" rollback-for="Throwable" /><tx:method name="*" timeout="30" /></tx:attributes></tx:advice></beans>

3.数据源信息配置

这里用的是

druid的配置方式

spring:datasource:druid:url: jdbc:mysql://xx.xx.xx.xx:3306/operation?autoReconnect=true&useUnicode=true&characterEncoding=utf8&useSSL=falseusername: xxpassword: xxvalidationQuery: select 1maxActive: 20minIdle: 1initialSize: 4testOnReturn: falsetestWhileIdle: truetestOnBorrow: truelogAbandoned: falsetimeBetweenEvictionRunsMillis: 600000minEvictableIdleTimeMillis: 600000poolPreparedStatements: trueremoveAbandoned: truedriver-class-name: com.mysql.jdbc.Drivername: operation---
spring:datasource:druidOracle:url: jdbc:oracle:thin:@xx.xx.xx.xx:1521:ddzxcsdbusername: xxpassword: xxvalidationQuery: select 1 from dualmaxActive: 20minIdle: 1initialSize: 4testOnReturn: falsetestWhileIdle: truetestOnBorrow: truelogAbandoned: falsetimeBetweenEvictionRunsMillis: 600000minEvictableIdleTimeMillis: 600000poolPreparedStatements: trueremoveAbandoned: truedriver-class-name: oracle.jdbc.OracleDrivername: ds_o2o_co

4.然后是两个数据源信息的整合

DataSource1Config.java

package com.ai.rai.interests.operation.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.autoconfigure.jdbc.DataSourceBuilder;
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 javax.sql.DataSource;@Configuration
@MapperScan(basePackages = "com.ai.rai.interests.operation.dao",sqlSessionTemplateRef = "mySqlSessionTemplate")
public class DataSource1Config {@Bean(name = "myDataSource")@ConfigurationProperties(prefix = "spring.datasource.druid")@Primarypublic DataSource myDataSource() {return DataSourceBuilder.create().build();}@Bean(name = "mySqlSessionFactory")@Primarypublic SqlSessionFactory sqlSessionFactory(@Qualifier("myDataSource") DataSource dataSource) throws Exception {SqlSessionFactoryBean bean = new SqlSessionFactoryBean();bean.setDataSource(dataSource);bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/*.xml"));return bean.getObject();}@Bean(name = "transactionManager")@Primarypublic DataSourceTransactionManager transactionManager(@Qualifier("myDataSource") DataSource dataSource) {return new DataSourceTransactionManager(dataSource);}@Bean(name = "mySqlSessionTemplate")@Primarypublic SqlSessionTemplate sqlSessionTemplate(@Qualifier("mySqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {return new SqlSessionTemplate(sqlSessionFactory);}}

DataSource2Config.java

package com.ai.rai.interests.operation.datasource;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;import javax.sql.DataSource;@Configuration
@MapperScan(basePackages = "com.ai.rai.interests.operation.daoOracle",sqlSessionTemplateRef = "oracleSqlSessionTemplate")
public class DataSource2Config {@Bean(name = "oracleDataSource")@ConfigurationProperties(prefix = "spring.datasource.druidOracle")public DataSource oracleDataSource() {return DataSourceBuilder.create().build();}@Bean(name = "oracleSqlSessionFactory")public SqlSessionFactory oracleSqlSessionFactory(@Qualifier("oracleDataSource") DataSource dataSource) throws Exception {SqlSessionFactoryBean bean = new SqlSessionFactoryBean();bean.setDataSource(dataSource);bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapperOracle/*.xml"));return bean.getObject();}@Bean(name = "oracleTransactionManager")public DataSourceTransactionManager oracleTransactionManager(@Qualifier("oracleDataSource") DataSource dataSource) {return new DataSourceTransactionManager(dataSource);}@Bean(name = "oracleSqlSessionTemplate")public SqlSessionTemplate oracleSqlSessionTemplate(@Qualifier("oracleSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {return new SqlSessionTemplate(sqlSessionFactory);}
}

5.请注意目录的分布和变量名称的对应

目录分级很重要，一定要写对，否则扫描不到；

6.扫描目录配置

在Spring boot启动类里面加上新增的配置文件路径

注意boot配置的语法

7.mapper里面配置的路径一定要确认是对应的数据源，

否则会报：

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):这个错，

解决方案：https://blog.csdn.net/select_bin/article/details/80598699

尤其是对于用工具生成Mybatis文件的兄弟们；

8.如果使用框架整合了配置，尤其是很多工程集成的时候，比如：

如果数据源里面有Oracle的数据库，有时候可能会报这个错：

获取jdbc连接失败，加载数据库驱动失败， Failed to obtain JDBC Connection; nested exception is java.sql.SQLException:

解决方案：https://blog.csdn.net/select_bin/article/details/80608543

Example_Where_Clause

这个时候要设置扫描路径为本工程下面，然后从公共文件里面把配置文件复制一份到本工程，然后大功告成；

然后涉及Oracle和maven3，在加载包依赖的时候，maven3以后因为版权问题，不支持自动下载Oracle的jar包

简单粗暴的解决方案，在依赖里面自己配，然后把jar包放在maven的作用路径下面：

//手动导入jar包并在maven中配置依赖

mvn install:install-file -Dfile=D:\works\ojdbc7.jar -DgroupId=com.oracle -DartifactId=ojdbc7 -Dversion=11.2.0.1.0 -Dpackaging=jar

记得把这个路径改为自己的

可以直接在IDEA的控制台操作，

然后再pom文件里面加一下依赖：

<dependency><groupId>com.oracle</groupId><artifactId>ojdbc7</artifactId><version>11.2.0.1.0</version>
</dependency>

jar包下载：https://download.csdn.net/download/select_bin/10464723

参考资料：

https://blog.csdn.net/erlian1992/article/details/74279106

9.参考的资料：

https://blog.csdn.net/select_bin/article/details/80438973

http://www.cnblogs.com/ityouknow/p/6102399.html

http://www.cnblogs.com/winner-0715/p/6687247.html

https://github.com/heikehuan/springboot-multiple-dataSources