Java連接MySQL數據庫並查詢結果

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

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.Statement;


public class Test {

    public static void main(String[] args) {
        ResultSet rs=null;
        try {
            Class.forName("com.mysql.jdbc.Driver");//驅動的類名
            Connection conn=
            (Connection) DriverManager.getConnection(
                    "jdbc:mysql://127.0.0.1:3306/zhang", //服務器的IP地址和端口號，數據庫的名字
                    "root",//用戶名
                    "128928818"//密碼
                    );
            Statement stmt=(Statement) conn.createStatement();
            rs=stmt.executeQuery("select * from student");
            while(rs.next())
            {
                System.out.println(rs.getInt(1));
                System.out.println(rs.getString(2));
                System.out.println(rs.getString(3));
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            if(rs!=null)
            {
                try {
                    rs.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

}