1．Oracle8/8i/9i数据库（thin模式）?
????

Java代码

1. Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();??? ??
2. ????String?url="jdbc:oracle:thin:@localhost:1521:orcl";?//orcl为数据库的SID??? ??
3. ????String?user="test";??? ??
4. ????String?password="test";??? ??
5. ????Connection?conn=?DriverManager.getConnection(url,user,password);????

Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();   
    String url="jdbc:oracle:thin:@localhost:1521:orcl"; //orcl为数据库的SID   
    String user="test";   
    String password="test";   
    Connection conn= DriverManager.getConnection(url,user,password);  

2．DB2数据库?
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Java代码

1. Class.forName("com.ibm.db2.jdbc.app.DB2Driver?").newInstance();??? ??
2. ????String?url="jdbc:db2://localhost:5000/sample";?//sample为你的数据库名??? ??
3. ????String?user="admin";??? ??
4. ????String?password="";??? ??
5. ????Connection?conn=?DriverManager.getConnection(url,user,password);????

Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();   
    String url="jdbc:db2://localhost:5000/sample"; //sample为你的数据库名   
    String user="admin";   
    String password="";   
    Connection conn= DriverManager.getConnection(url,user,password);  

3．Sql Server7.0/2000数据库?
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Java代码

1. Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();??? ??
2. ???String?url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb";??? ??
3. ???//mydb为数据库??? ??
4. ???String?user="sa";??? ??
5. ???String?password="";??? ??
6. ???Connection?conn=?DriverManager.getConnection(url,user,password);????<