mysql 数据库连接

1、需要mysql驱动包：mysql-connector-java-5.1.7-bin.jar

2、　　

public static void main(String[] args) {
  try {
   Class.forName("com.mysql.jdbc.Driver");
   Connection connect = DriverManager.getConnection("jdbc:mysql://172.16.1.23:3306/jmuv3", "root", "123.com");
   System.out.println("已经连接数据库");
   Statement stmt = connect.createStatement();
   ResultSet rs = stmt.executeQuery("select * from users limit 10");
   while (rs.next()) {
    System.out.println(rs.getString("username"));
   }
  } catch (Exception e) {
   e.printStackTrace();
  }

 }