手册:http://dev.mysql.com/doc/connector-j/en/connector-j-master-slave-replication-connection.html
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jdbc:mysql:replication://[master host][:port],[slave host 1][:port][,[slave host 2][:port]]...[/[database]]
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[?propertyName1=propertyValue1[&propertyName2=propertyValue2]...]
roundRobinLoadBalance=true
autoReconnect=true
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com.mysql.jdbc.ReplicationDriver;