java jdbc驱动 连接数据库的核心方法（MySQL,SQL Server,Access）

SQL Server:

try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
String url="jdbc:sqlserver://localhost:1433;databaseName=stu_info;integratedSecurity=true;";

        Connection con = DriverManager.getConnection(url);

        ....

} catch (Exception e) {
e.printStackTrace();

    }

Access:

try {
Class.forName("com.hxtt.sql.access.AccessDriver");
String url="jdbc:Access:///H:/Test.mdb";//这是数据库文件的绝对路径

        Connection con = DriverManager.getConnection(url);

        ....

} catch (Exception e) {
e.printStackTrace();

    }

MySQL:

try {
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:3306/HomeWork";

        Connection con=DriverManager.getConnection(url,"root","12345678");//root是用户名，12345678是密码

        ....

} catch (Exception e) {
e.printStackTrace();

    }