jdbc:oracle:thin:@(DESCRIPTION=(LOAD_BALANCE=on)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=10.243.15.32)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=10.243.15.33)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=paccdb)))
LOAD_BALANCE=on 负载均衡开启
SERVICE_NAME=paccdb 采用服务名，而不是SID，每台数据库都有自己独立的SID