xiaoku.java

这是我写的产品管理系统

package xiao.xiaoshouxiaoshou;
import yuan.xiaoshou.*;
import sun.BuMenXiaoShou.*;
import sn.ChangPingXiaoShou.*;
import deng.shaoxiao.*;
import com.yonghuxiaoshou.*;
import cn.KeKuXiaoShao.*;

//销售数据库
import java.sql.*;
import java.util.*;
public class XiaoKu {
	//驱动类
	private static final String sDBDriver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
	//连接字符串
	private static final String url = "jdbc:sqlserver://localhost:1433;databasename = XiaoShou";
	//连接姓名
	private static final String user = "zhou";
	//连接密码
	private static final String pwd = "111111";
	//连接发送集
	private static PreparedStatement ps = null;
	//连接结果集
	private static ResultSet rs = null;
	//定义一个连接的方法
	public static Connection getconn(){
		Connection conn = null;
		try{
			Class.forName(sDBDriver);
			conn = DriverManager.getConnection(url,user,pwd);
		}
		catch(java.lang.ClassNotFoundException e){
			System.out.println ("找不到文件");
		}
		catch(SQLException e){
			System.out.println ("连接失败");
		}
		return conn;
	}
	//1定义一个查询的方法(不带参数)
	public static ResultSet select(){
		Connection conn = getconn();
		try{
			ps = conn.prepareStatement("select * from t_ji");
			rs = ps.executeQuery();
		}
		catch(SQLException e){
			System.out.println ("查询失败");
		}
		return rs;
	}
	//定义一个增加的方法
	public static int insert(int P_id,int ID,int D_id,int S_count,String S_name,String S_date){
		Connection conn = getconn();
		int num = 0;
		try{
			ps = conn.prepareStatement("insert into t_ji values(?,?,?,?,?,?)");
			ps.setInt(1,P_id);
			ps.setInt(2,ID);
			ps.setInt(3,D_id);
			ps.setInt(4,S_count);
			ps.setString(5,S_name);
			ps.setString(6,S_date);
			num = ps.executeUpdate();
		}
		catch(SQLException e){
			System.out.println ("添加失败");
		}
		finally{
			try{
				ps.close();
				conn.close();
			}
			catch(SQLException e){
				System.out.println ("sql添加失败");
			}
		}
		return num;
	}
	//定义一个修改的方法
	public static int update(int P_id,int ID,int D_id,int S_count,String S_name,String S_date,int ID1){
		Connection conn = getconn();
		int num = 0;
		try{
			ps = conn.prepareStatement("update t_ji set P_id = ?,ID = ?,D_id = ?,S_count = ?,S_name = ?,S_date = ? where ID = ?");
			ps.setInt(1,P_id);
			ps.setInt(2,ID);
			ps.setInt(3,D_id);
			ps.setInt(4,S_count);
			ps.setString(5,S_name);
			ps.setString(6,S_date);
			ps.setInt(7,ID1);
			num = ps.executeUpdate();
		} 
		catch(SQLException e){
			System.out.println ("修改失败");
		}
		finally{
			try{
				ps.close();
				conn.close();
			}
			catch(SQLException e){
				System.out.println ("sql修改失败");
			}
		}
		return num;
	}		
	//定义一个删除的方法
	public static int delete(int ID){
		Connection conn = getconn();
		int num = 0;
		try{
			ps = conn.prepareStatement("delete from t_ji where ID = ?");
			ps.setInt(1,ID);
			num = ps.executeUpdate();
		}
		catch(SQLException e){
			System.out.println ("删除失败");
		}
		finally{
			try{
				ps.close();
				conn.close();
			}
			catch(SQLException e){
				System.out.println ("sql删除失败");
			}
		}
		return num;
	}
}