# 使用多数据源
上面的方式都是只引入一个数据源，在某些场景下，需要引入多个数据库，操作不同的数据库，此时，可以通过配置不同前缀来注入多个datasource的bean，方法如下：
- 引入依赖。
  ```
  <dependency>
      <groupId>com.huaweicloud.devspore</groupId>
      <artifactId>spring-cloud-starter-huawei-devspore-datasource</artifactId>
      <version>${lastest}</version>
  </dependency>
  ```
  
- 配置文件中配置多个数据源。
  ```
  devspore:
     datasource1:
          props:
            version: v1
            appId: xxx
            monitorId: xxx
            databaseName: xxx
            decipherClassName: xxx.xxx.xxx
            region: az0
          etcd:
            address: 127.0.0.2:2379,127.0.0.2:2379,127.0.0.2:2379
            apiVersion: v3
            username: etcduser
            password: etcdpwd
            httpsEnable: false
          sources:
            ds1:
              driverClassName: com.mysql.jdbc.Driver
              jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds0
              username: datasourceuser
              password: datasourcepwd
              type: com.zaxxer.hikari.HikariDataSource
            ds2:
              driverClassName: com.mysql.jdbc.Driver
              jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds1
              username: datasourceuser
              password: datasourcepwd
              type: com.zaxxer.hikari.HikariDataSource
          router:
            active: dc1
            routeAlgorithm: single-read-write 
            nodes:
              dc1:  
                master: ds1
              dc2:  
                master: ds1
      datasource2:
          props:
            version: v1
            appId: xxx
            monitorId: xxx
            databaseName: xxx
            decipherClassName: xxx.xxx.xxx
            region: az0
          etcd:
            address: 127.0.0.2:2379,127.0.0.2:2379,127.0.0.2:2379
            apiVersion: v3
            username: etcduser
            password: etcdpwd
            httpsEnable: false
          sources:
            ds1:
              driverClassName: com.mysql.jdbc.Driver
              jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds0
              username: datasourceuser
              password: datasourcepwd
              type: com.zaxxer.hikari.HikariDataSource
            ds2:
              driverClassName: com.mysql.jdbc.Driver
              jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds1
              username: datasourceuser
              password: datasourcepwd
              type: com.zaxxer.hikari.HikariDataSource
          router:
            active: dc1
            routeAlgorithm: single-read-write 
            nodes:
              dc1:  
                master: ds1
              dc2:  
                master: ds1
  ```
  
- 根据前缀注入多个datasource。 在配置类中根据yml中的前缀，分别注入bean，并进行命名，然后即可分别操作不同的datasource。
  ```
  @Configuration
  public class App {
      @ConfigurationProperties(prefix = "devspore.datasource1")
      @Bean(name = "ds1")
      public DataSource dataSource1() {
          return new ClusterDataSource();
      }
      @ConfigurationProperties(prefix = "devspore.datasource2")
      @Bean(name = "ds2")
      public DataSource dataSource2() {
          return new ClusterDataSource();
      }
  }
  ```