jdbc链接数据库操作

package com.zhu.jdbc;
import java.sql.*;
/**
* Created by idea on 2016/6/6.
* 我就是你们的小星星
*/
public class Demo01 {
public static void main(String[] args) {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
String driverClassName = "com.mysql.jdbc.Driver";
Class.forName(driverClassName);
String url = "jdbc:mysql://127.0.0.1:3306/mybatis?user=root&password=root";
conn = DriverManager.getConnection(url);
ps = conn.prepareStatement("SELECT * FROM USER WHERE id = ?");
ps.setObject(1 , 1);
rs = ps.executeQuery();
while (rs.next()) {
System.out.println(rs.getObject(1)+" : "+ rs.getObject(2)+" : "+rs.getObject(3));
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally {
try {
if (rs != null) {
rs.close();
rs = null;
}
if (ps != null) {
ps.close();
ps = null;
}
if (conn != null) {
conn.close();
conn = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}