Oracle RAC JDBC connection string

完全正确

https://stackoverflow.com/questions/1646630/what-is-the-correct-jdbc-url-to-connect-to-a-rac-database

jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=OFF)(FAILOVER=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db1.myco.com)(PORT=1604))
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db2.myco.com)(PORT=1604)))
(CONNECT_DATA=(SERVICE_NAME=mydb1.myco.com)(SERVER=DEDICATED)))

官方文档, 一如既往地冗长, 可靠

https://docs.oracle.com/database/121/HABPT/config_fcf.htm#HABPT5381

PoolDataSource pds = PoolDataSourceFactory.getPoolDataSource();
pds.setConnectionFactoryClassName("oracle.jdbc.pool.OracleDataSource"); pds.setUser("system"); 
 pds.setPassword("oracle"); 
 String dbURL = 
 "jdbc:oracle:thin:@" + 
 "(DESCRIPTION=" + 
"(FAILOVER=on)" + 
 "(ADDRESS_LIST=" + 
 "(LOAD_BALANCE=on)" + 
 "(CONNECT_TIMEOUT=3)(RETRY_COUNT=3)" +
 "(ADDRESS=(PROTOCOL=TCP)(HOST=prmy-scan)(PORT=1521))"+     "(ADDRESS=(PROTOCOL=TCP)(HOST= stby-scan)(PORT=1521)))" + 
 "(CONNECT_DATA=(SERVICE_NAME=oltpworkload)))" 
 System.out.println("Url=" + dbURL); 
 pds.setURL(dbURL); 

"jdbc:oracle:thin:@" + 
 "(DESCRIPTION=" + 
"(FAILOVER=on)" + 
 "(ADDRESS_LIST=" + 
 "(LOAD_BALANCE=on)" + 
 "(CONNECT_TIMEOUT=3)(RETRY_COUNT=3)" +
 "(ADDRESS=(PROTOCOL=TCP)(HOST=prmy-scan)(PORT=1521))"+     "(ADDRESS=(PROTOCOL=TCP)(HOST= stby-scan)(PORT=1521)))" + 
 "(CONNECT_DATA=(SERVICE_NAME=oltpworkload)))" 

PoolDataSource pds = PoolDataSourceFactory.getPoolDataSource();
pds.setConnectionFactoryClassName("oracle.jdbc.pool.OracleDataSource"); pds.setUser("system"); 
 pds.setPassword("oracle"); 
 String dbURL = 
 "jdbc:oracle:thin:@" + 
 "(DESCRIPTION_LIST=" + 
 "(LOAD_BALANCE=off)" + 
 "(FAILOVER=on)" + 
 "(DESCRIPTION=" +
 "(CONNECT_TIMEOUT=3)(RETRY_COUNT=3)" +
 "(ADDRESS_LIST=" + 
 "(LOAD_BALANCE=on)" + 
 "(ADDRESS=(PROTOCOL=TCP)(HOST=prmy-scan)(PORT=1521)))" + 
 "(CONNECT_DATA=(SERVICE_NAME=oltpworkload)))" + 
 "(DESCRIPTION=" + 
 "(ADDRESS_LIST=" + 
 "(LOAD_BALANCE=on)" + 
 "(ADDRESS=(PROTOCOL=TCP)(HOST= stby-scan)(PORT=1521)))" + 
 "(CONNECT_DATA=(SERVICE_NAME=oltpworkload))))"; 
 System.out.println("Url=" + dbURL); 
 pds.setURL(dbURL); 

这个第三方总结很简单, 看样子是第三方驱动厂商

https://support.tibco.com/s/article/JDBC-dbURL-when-using-failover-servers-with-Oracle

Resolution

 When creating the bootstrap use the following formats for the JDBC connection string.

Case 1: When using tibcosoftwareinc.jdbc.oracle.OracleDriver driver (Oracle (DataDirect)), JDBC URL field should contain:

jdbc:tibcosoftwareinc:oracle://<myhost1>:<myport1>SID=<myservice1>AlternateServers=(<myhost2>:<myport2>SID=<myservice2>)

Example URL:

jdbc:tibcosoftwareinc:oracle://host1:1521;ServiceName=orcl;AlternateServers=(host2:1521)

Case 2: When using oracle.jdbc.driver.OracleDriver (the native driver form Oracle), the JDBC URL field should contain:

jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=<myhost1>)(PORT=<myport1>))(SERVICE_NAME=<myservice1>))(ADDRESS=(PROTOCOL=TCP)(HOST=<myhost2>)(PORT=<myport2>))(LOAD_BALANCE=yes)(CONNECT_DATA=(SERVICE_NAME=<myservice2>)(FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC)(RETRIES=180))))

Example URL:

jdbc:oracle:thin:@(DESCRIPTION=(LOAD_BALANCE=on)(ADDRESS=(PROTOCOL=TCP)(HOST=host1) (PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=host2) (PORT=1521))(CONNECT_DATA=(SERVICE_NAME=orcl)))

See more information in Oracle's documentation.

Reference

 Oracle documentation: Configuring Fast Connection Failover for JDBC Clients