MySQL数据库通过JDBC操作，简单查询

package com.zeph.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class MySQLDBManager {
public static void main(String[] args) {
String user = "root";
String password = "123456";
String url = "jdbc:mysql://localhost:3306/mytable";
String sql = "select * from user";
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(url, user, password);
stat = conn.createStatement();
rs = stat.executeQuery(sql);
while (rs.next()) {
System.out.println(rs.getLong(1) + " " + rs.getString(2) + " "
+ rs.getString(3));
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
rs.close();
stat.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
conn = null;
stat = null;
rs = null;
}
}
}