how to configurate r2dbc with yaml? - project-reactor

Question

I am configuring r2db-mysql application with yaml ,
but its run error when i try to connect mysql
here is my yaml config
spring:
r2dbc:
url: r2dbc:mysql://localhost:3306/schema?useUnicode=true&characterEncoding=utf-8&txcAppName=account&useSSL=true
username: root
password: root
here is error stack
Caused by: java.lang.IllegalStateException: Unable to create a ConnectionFactory for 'ConnectionFactoryOptions{options={database=schema, host=localhost, driver=mysql, useUnicode=true, characterEncoding=utf-8, password=REDACTED, port=3306, txcAppName=account, useSSL=true, user=ifx}}'. Available drivers: [ pool ]
at io.r2dbc.spi.ConnectionFactories.get(ConnectionFactories.java:145)
at org.springframework.boot.autoconfigure.r2dbc.ConnectionFactoryBuilder.build(ConnectionFactoryBuilder.java:125)
at org.springframework.boot.autoconfigure.r2dbc.ConnectionFactoryConfigurations.createConnectionFactory(ConnectionFactoryConfigurations.java:56)
at org.springframework.boot.autoconfigure.r2dbc.ConnectionFactoryConfigurations$Pool.connectionFactory(ConnectionFactoryConfigurations.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
... 84 common frames omitted
Due to the failure configuration experience with yaml, i try to according to [offical article] (https://github.com/mirromutth/r2dbc-mysql) to configurate in spring with java bean ,and its success
here is code sample
#Bean
public ConnectionFactory initConnectionFactory(#Autowired R2dbcProperties r2dbcProperties){
ConnectionFactory pooledConnectionFactory = ConnectionFactories.get(ConnectionFactoryOptions.builder()
.option(DRIVER,"mysql")
// .option(PROTOCOL,"mysql") // driver identifier, PROTOCOL is delegated as DRIVER by the pool.
.option(HOST,"xxxx")
.option(PORT,3306)
.option(USER,"root")
.option(PASSWORD,"root")
.option(DATABASE,"schema")
.build());
return pooledConnectionFactory;
}