create yml for springboot shardingsphere 5.11,use three datasource,use another database when this is read only on write

Sure, here's an example of a YML file for a Spring Boot application using Shardingsphere 5.11 with three data sources and switching to a read-only database when necessary:

spring:
  shardingsphere:
    datasource:
      names: ds0, ds1, ds2
      ds0:
        url: jdbc:mysql://localhost:3306/db_master?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
        username: root
        password: root
        driver-class-name: com.mysql.jdbc.Driver
      ds1:
        url: jdbc:mysql://localhost:3306/db_slave1?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
        username: root
        password: root
        driver-class-name: com.mysql.jdbc.Driver
      ds2:
        url: jdbc:mysql://localhost:3306/db_slave2?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
        username: root
        password: root
        driver-class-name: com.mysql.jdbc.Driver
    props:
      sql:
        show: true
    sharding:
      tables:
        user:
          actual-data-nodes: ds$->{0..2}.user_$->{0..1}
          table-strategy:
            inline:
              sharding-column: id
              algorithm-expression: user_$->{id % 2}
          key-generator:
            column: id
            type: SNOWFLAKE
            worker-id: 123
      default-database-strategy:
        inline:
          sharding-column: user_id
          algorithm-expression: ds$->{user_id % 3}
      master-slave-rules:
        ms_ds:
          master-data-source-name: ds0
          slave-data-source-names: ds1, ds2
      read-write-splitting-rules:
        right_db:
          write-data-source-name: ds0
          read-data-source-names: ds1, ds2
          load-balance-algorithm-type: ROUND_ROBIN
      props:
        sql:
          show: true
        # When in read-only mode, switch to using the read-only database.
        # This assumes the read-only database is ds2.
        read-only:
          enabled: true
          data-sources: ds1
        replica-query:
          enable: true

I hope this helps! Let me know if you have any more questions.