employeeoperation.java

该源代码实现了系统的进货

package operation;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;

import entity.*;

import dataBase.DataBase;

public class EmployeeOperation
{
	public EmployeeOperation()
	{
		db = new DataBase();
	}

	//获得员工编号
	public int addEmployeeID()
	{
		try
		{
			sql1 = "select * from EmployeeInfo";
			rs = db.getResult(sql1);
			rs.last();
			EmployeeID = rs.getRow()+1;
			sql6 = "select * from EmployeeInfo";
			rs=db.getResult(sql6);
			//为了防止删除用户之后再添加信息时，员工编号重复，而将新录入的员工编号与数据库中的编号比较
			while(rs.next())
			{
				EmployeeInfo employee = new EmployeeInfo();
				int id = Integer.parseInt(rs.getString("employeeID"));
				if (EmployeeID <= id)
				{
					EmployeeID = id + 1;
				}
			}
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
		return EmployeeID;
	}
	
	//录入员工信息
	public void addEmployeeInfo(boolean flag,int employeeID,String employeeName,String password,String employeeClass)
	{
		if (flag == true)
		{
			sql2 = "insert into EmployeeInfo values('"+employeeID+"','"+employeeName+"','"+password+"','"+employeeClass+"')";
			db.ExeQuery(sql2);
		}
	}
	
	//员工信息查询
	public Collection EmployeeSearch()
	{
		sql3 = "select * from EmployeeInfo";
		rs=db.getResult(sql3);
		Collection ret=new ArrayList();
		
		try
		{
			while(rs.next())
			{
				EmployeeInfo employee = new EmployeeInfo();
				String id = rs.getString("employeeID");
				employee.setEmployeeID(Integer.parseInt(id));
				employee.setEmployeeName(rs.getString("employeeName"));
				employee.setPassword(rs.getString("password"));
				employee.setEmployeeClass(rs.getString("employeeClass"));
				ret.add(employee);
			}
		
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return ret;
	}
	
	//员工信息修改
	public void modifyEmployeeInfo(int employeeID,String employeeName,String password,String employeeClass)
	{
		sql4 = "update EmployeeInfo set employeeName = '"+employeeName+"' , password = '"+password+"', employeeClass = '"+employeeClass+"' where employeeID = '"+employeeID+"'";
		db.ExeQuery(sql4);
	}
	
	//员工信息删除
	public void deleteEmployeeInfo(int employeeID)
	{
		sql5 = "delete from EmployeeInfo where employeeID = '"+employeeID+"'";
		db.ExeQuery(sql5);
	}
	
	//关闭连接
	public void close()
	{
		db.shut();
	}
	private DataBase db = null;
	private String sql1 = "";
	private ResultSet rs = null;
	private int EmployeeID = 0;
	private String sql2 = "";
	private String sql3 = "";
	private String sql4 = "";
	private String sql5 = "";
	private String sql6 = "";
}