jdbc url 参数: keepAlive=true&rewriteBatchedStatements=true&useConfigs=maxPerformance&failOverReadOnly=false&allowMultiQueries=true&wait_timeout=31536000&autoReconnect=true&maxReconnects=10&useServerPrepStmts=true&useSSL=false&useUnicode=true&prepStmtCacheSqlLimit=2048000&cachePrepStmts=true&characterEncoding=utf-8&useCursorFetch=true&prepStmtCacheSize=1000