数据库连接

mysql

 // JDBC 驱动名及数据库 URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost:3306/jxufe_oa";

    // 数据库的用户名与密码，需要根据自己的设置
    static final String USER = "root";
    static final String PASS = "root";

    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        try {
            // 注册 JDBC 驱动
            Class.forName(JDBC_DRIVER);

            // 打开链接
            System.out.println("连接数据库...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            // 执行查询
            System.out.println(" 实例化Statement对象...");
            stmt = conn.createStatement();
            String sql;
            sql = "SELECT username,college from t_user_details where username='admin'";
            ResultSet rs = stmt.executeQuery(sql);

            // 展开结果集数据库
            while (rs.next()) {
                // 通过字段检索
                String username = rs.getString("username");
                String college = rs.getString("college");

                // 输出数据
                System.out.println("用户账号: " + username);
                System.out.println("学院: " + college);
            }
            // 完成后关闭
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException se) {
            // 处理 JDBC 错误
            se.printStackTrace();
        } catch (Exception e) {
            // 处理 Class.forName 错误
            e.printStackTrace();
        }
        System.out.println("Goodbye!");


    }

mssql

	static final String JDBC_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    static final String DB_URL = "jdbc:sqlserver://url地址:1433;DatabaseName=JxufeNewOffice";
    static final String USER = "账号";
    static final String PASS = "密码";