SpringBoot +druid+oracle+mybatis 双数据源项目介绍

1、项目整体目录

2、pom文件  

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.2.2.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>
   <groupId>com.yhc</groupId>
   <artifactId>demo-new</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>demo-new</name>
   <description>Demo project for Spring Boot</description>

   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
   </properties>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      <!-- mybatis对springBoot的支持-->
      <dependency>
         <groupId>org.mybatis.spring.boot</groupId>
         <artifactId>mybatis-spring-boot-starter</artifactId>
         <version>1.3.2</version>
      </dependency>
      <!-- 使用oracle数据库驱动 -->
      <dependency>
         <groupId>com.oracle</groupId>
         <artifactId>ojdbc6</artifactId>
         <version>11.2.0.3</version>
         <scope>runtime</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </dependency>
      <!-- 数据库连接池  用的是阿里的德鲁伊 druid-->
      <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid</artifactId>
         <version>1.1.9</version>
      </dependency>

      <!-- 应用apache Commons jar包-->
      <dependency>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-lang3</artifactId>
         <version>3.7</version>
      </dependency>


   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>

3、配置文件 application.properties

3、关于数据源的配置文件

（1）主数据源配置
@Configuration
@MapperScan(basePackages = SelfDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "selfSqlSessionFactory")
public class SelfDataSourceConfig {
    static final String PACKAGE = "com.xinbo.dao.selfMapper";
    static final String MAPPER_LOCATION = "classpath:selfMapping/*.xml";
    @Value("${spring.datasource.self.url}")
    private String url;

    @Value("${spring.datasource.self.username}")
    private String user;

    @Value("${spring.datasource.self.password}")
    private String password;

    @Value("${spring.datasource.self.driverClassName}")
    private String driverClass;

    @Bean(name = "selfDataSource")
    @Primary
    public DataSource selfDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }
    @Bean(name = "selfTransactionManager")
    @Primary
    public DataSourceTransactionManager selfTransactionManager() {
        return new DataSourceTransactionManager(selfDataSource());
    }
    @Bean(name = "selfSqlSessionFactory")
    @Primary
    public SqlSessionFactory selfSqlSessionFactory(@Qualifier("selfDataSource") DataSource selfDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(selfDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(SelfDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }

（2）第二个数据源配置
@Configuration
@MapperScan(basePackages = CdrDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "cdrSqlSessionFactory")
public class CdrDataSourceConfig {
    static final String PACKAGE = "com.xinbo.dao.cdrMapper";
    static final String MAPPER_LOCATION = "classpath:cdrMapping/*.xml";
    @Value("${spring.datasource.cdr.url}")
    private String url;

    @Value("${spring.datasource.cdr.username}")
    private String user;

    @Value("${spring.datasource.cdr.password}")
    private String password;

    @Value("${spring.datasource.cdr.driverClassName}")
    private String driverClass;
    @Bean(name = "cdrDataSource")
    public DataSource cdrDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean(name = "cdrTransactionManager")
    public DataSourceTransactionManager cdrTransactionManager() {
        return new DataSourceTransactionManager(cdrDataSource());
    }

    @Bean(name = "cdrSqlSessionFactory")
    public SqlSessionFactory cdrSqlSessionFactory(@Qualifier("cdrDataSource") DataSource cdrDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(cdrDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(CdrDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }

}

到这里数据源配置就结束了 其他的写法和SpringBoot创建web 的写法