cn.harveychan canal 1.0.0 4.0.0 canal-example canal-example easy canal client https://github.com/canhungwai/canal-client.git cn.harveychan canal-spring-boot-starter org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-jooq mysql mysql-connector-java org.flywaydb flyway-core org.springframework.kafka spring-kafka com.alibaba druid ${druid.version}