jdbc连接mysql oracle sql server数据库的连接字符串

jdbc连接mysql    oracle  sql server数据库的连接字符串,记下免得以后忘记

//SQL Server
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").
newInstance();
conn = DriverManager.getConnection("jdbc:Microsoft:sqlserver://localhost:1433;DatabaseName=数据库名","用户名","密码");
//Oracle
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:数据库名", "用户名", "密码");
//Mysql
Class.forName("org.git.mm.mysql.Driver").newInstance();
conn =DriverManager.getConnection("jdbc:mysql://localhost:3306/数据库名","用户名","密码");
//处理中文的问题:
jdbc:mysql://localhost:3306/数据库名?useUnicode=true
&characterEncoding=GB2312