Java JDBC连接MySQL、Oracle、SQLServer数据库

JDBC链接MySQL

    @Test
    public void mySqlTest() {
        String driverName = "com.mysql.jdbc.Driver";
        String dbUrl = "jdbc:mysql://localhost:3306/dbName";
        String username = "root";
        String password = "root";
        Connection con = null;
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        try {
            con = DriverManager.getConnection(dbUrl, username, password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        System.out.println(con.toString());
    }

JDBC链接Oracle

    @Test
    public void oracleTest() {
        String driverName = "oracle.jdbc.driver.OracleDriver";
        String dbUrl = "jdbc:oracle:thin:@127.0.0.1:1521:服务名";
        String username = "root";
        String password = "root";
        Connection con = null;
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        try {
            con = DriverManager.getConnection(dbUrl, username, password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        System.out.println(con.toString());
    }

JDBC链接SQLServer

    @Test
    public void sqlServerTest() {
        String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
        String dbUrl = "jdbc:sqlserver://localhost:1433;databaseName=master;";
        String username = "root";
        String password = "root";
        Connection con = null;
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        try {
            con = DriverManager.getConnection(dbUrl, username, password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        System.out.println(con.toString());
    }

 记得下载数据库驱动jar，SQLServer和Oracle jar包maven私服是没有的，自己去网上找。