unitdao.java~1~

销售管理系统 随着我国国民经济的持续发展

package com.dao;

import com.tool.JDBConnection;
import java.util.*;
import com.domain.UnitVO;
import java.sql.*;

//对计量单位的操作
public class UnitDao {
  private JDBConnection connection = null;
  public UnitDao() {
    connection = new JDBConnection();
    this.connection.creatConnection(); //利用构造方法调用类中的对象对数据库创建连接
  }

  //查询全部的计量单位
  public List unitSelect() {
    List list = new ArrayList();
    UnitVO unit = null;
    String sql = "select * from tb_unit";
    ResultSet rs=connection.executeQuery(sql);
    while(rs.next()){}
    return list;
  }

}