JDBC 简单数据库操作

package cose.seu.edu.cn.cosersoft;
import java.sql.*;
public class Test {
    /*
     * Create a connection to MYSQL database
     */
    public static Connection getConnection() 
        throws ClassNotFoundException, SQLException{
        String url="jdbc:mysql://127.0.0.1:3306/myDb";
        Class.forName("com.mysql.jdbc.Driver");
        String username="root";
        String password="coser";
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }
    public static void PrintResult(ResultSet rs) throws SQLException{
        while(rs.next()){
            System.out.println(rs.getInt(1));
        }
    }
    public static void main(String [] args) throws Exception{
        Connection conn = getConnection();
        Statement sqlstate = conn.createStatement();
        if(!conn.isClosed())
            System.out.println("连接数据库成功");
        else System.out.println("连接数据库失败");        
        //Execute common sql text;
        String sqltext = "select * from mytb";
        ResultSet rs = sqlstate.executeQuery(sqltext);
        PrintResult(rs);
        sqlstate.close();
        //Call procedure with no parameters
        CallableStatement cs = conn.prepareCall("{call myPro()}");
        rs=cs.executeQuery();
        PrintResult(rs);
        cs.close();
        //Call procedure with parameters
        CallableStatement cs2 = conn.prepareCall("{call pr_Add(?)}");
        //add parameter
        cs2.setInt(1, 1001);
        cs2.execute();
        System.out.println("Insert successfully!");
        cs2.close();
        conn.close();
    }
}