SqlServer增刪改查例子

這是之前做過的，當時學校教的微軟的SqlServer2008，所以資料庫是這個，但是大同小異，
目前我使用MySql，以下程式碼是連線SqlServer2008的。
前提：
下載好相應版本的驅動jar包 下載連結http://download.csdn.net/detail/acm_th/9190425

程式碼如下：

package com.example.homework;

import java.sql.*;

//定義介面
interface SqlInter {
    void insertData(String name, String note, float
 
 price, int amount); //插入資料方法

    void updateData(String name, int pid);  // 更新資料方法

    void deleteData(int pid);  // 刪除資料方法

    void queryData();  // 查詢資料方法
}

public class SqlDemo implements SqlInter {

    private PreparedStatement pstat = null;
    private ResultSet rs = null;
    private String forname = "com.microsoft.sqlserver.jdbc.SQLServerDriver"
 
;
    private String getConnection = "jdbc:sqlserver://127.0.0.1:1433;DatabaseName=product";
    private String admin = "sa";
    private String pass = "123456";
    private Connection con = null;

    public SqlDemo() {
        try {
            Class.forName(forname);// 載入驅動器
            con = DriverManager.getConnection(getConnection, admin, pass);
        } catch
 
 (Exception e) {
            e.printStackTrace();
        }
    }

    // 刪除資料
    public void deleteData(int pid) {
        try {
            String seek = "DELETE Product WHERE pid = ?";
            pstat = con.prepareStatement(seek);
            pstat.setInt(1, pid);

            int res = pstat.executeUpdate();
            System.out.println(res > 0 ? "刪除成功" : "刪除失敗");

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    // 更新資料
    public void updateData(String name, int pid) {

        try {
            String seek = "UPDATE Product SET name = ? WHERE pid = ?";
            pstat = con.prepareStatement(seek);
            pstat.setString(1, name);
            pstat.setInt(2, pid);
            int res = pstat.executeUpdate();
            System.out.println(res > 0 ? "更新成功" : "更新失敗");

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    // 插入資料
    public void insertData(String name, String note, float price, int amount) {

        try {
            String seek = "INSERT Product VALUES (?, ?, ?, ?)";
            pstat = con.prepareStatement(seek);
            pstat.setString(1, name);
            pstat.setString(2, note);
            pstat.setFloat(3, price);
            pstat.setInt(4, amount);

            int res = pstat.executeUpdate();
            System.out.println(res > 0 ? "插入資料成功" : "插入資料失敗");

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    // 查詢方法 查詢全部資料
    public void queryData() {
        try {
            String seek = "SELECT * FROM Product";
            pstat = con.prepareStatement(seek);
            rs = pstat.executeQuery();// 傳送查詢
            while (rs.next()) {
                System.out.println("產品編號" + rs.getString(1) + "\n" + "產品名稱"
                        + rs.getString(2) + "\n" + "產品簡介" + rs.getString(3)
                        + "\n" + "產品單價" + rs.getString(4) + "\n" + "產品數量"
                        + rs.getString(5));
                System.out.println("");
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        new SqlDemo();
    }
}