public class MysqlConnect {//定义MySQL数据库的连接地址public static final String DBURL = "jdbc:mysql://ip:port/数据库名?autoReconnect=true&useUnicode=true&characterEncoding=utf8&useSSL=false";//MySQL数据库的连接用户名和连接密码public static final String DBUSER = "用户";public static final String DBPASS = "密码";public static final String SQLNAME = "com.mysql.jdbc.Driver";//驱动public void mysqlConn(String sql) {Connection conn = null;int id;String name = null;String count = null;try{Class.forName(SQLNAME);}catch(ClassNotFoundException e){e.printStackTrace();}
//         sql = "sql语句";try {conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);System.out.println(conn);Statement stmt = conn.createStatement();ResultSet resultSet = stmt.executeQuery(sql);while (resultSet.next()){id = resultSet.getInt("id");//通过字段拿值name = resultSet.getString("name");//通过字段拿值count = resultSet.getString("count(1)");//通过字段拿值System.out.println("id: " + id + ", name: " + name + ", count: " + count);}conn.close();} catch (SQLException e1) {e1.printStackTrace();}}
}

maven依赖包：

        <!-- MySql 5.5 Connector --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.25</version></dependency>