JDBC连接MYSQL模板

package xh.test;

import java.sql.*;

public class JdbcConMysql {
    public static void main(String[] args) {
        ResultSet rs = null;
        Statement stmt = null;
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/dataBase_name", "username", "password");
            stmt = conn.createStatement();
            rs = stmt.executeQuery("select * from student");
            while (rs.next()) {
                System.out.print(rs.getInt("id") + " " + rs.getString("name") + " " + rs.getInt("age"));
            }
        } catch (SQLException e1) {
            e1.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                    rs = null;
                }
                if (stmt != null) {
                    stmt.close();
                    stmt = null;
                }
                if (conn != null) {
                    conn.close();
                    conn = null;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}