husermgr.java

采用Jsp,Javabean,Servlet等做的人力资源管理系统,后台管理用户及密码均是:admin

package dbmgr;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;

import userbean.Huser;

public class HuserMgr {
	DBConMgr db_conn=new DBConMgr();
	
 public Collection search(String name)
	{
		db_conn.ConnectDB();
		Collection showlist=new ArrayList();
		ResultSet rs = null;
		try{
			String sql="select * from diaodong where id ='"+name+"'";
			rs = db_conn.stmt.executeQuery(sql); 
			Huser user = null;
			while(rs.next())
			{
				user=new Huser();
				user.setId(rs.getInt("id"));
				user.setName(rs.getString("name"));
				user.setBefore(rs.getString("before"));
				user.setAfter(rs.getString("after"));
				user.setTime(rs.getString("time"));
				user.setYstyle(rs.getString("ystyle"));
				showlist.add(user);
			}
			return showlist;
		}
		catch (SQLException SqlE) {
			SqlE.printStackTrace();
			return null;
		} 
		catch (Exception E) {
			E.printStackTrace();
			return null;
		} 
		finally {
			// 关闭连接，释放数据库资源：
			db_conn.CloseDB();
		}
	}
 
 public Collection getAll(){
		db_conn.ConnectDB();
		Collection showlist=new ArrayList();
		ResultSet rs = null;
		try{
			System.out.println("111111");
			String sql="select * from diaodong  order by id asc";
			rs = db_conn.stmt.executeQuery(sql); 
			Huser user = null;
			while(rs.next())
			{
				user=new Huser();
			    user.setId(rs.getInt("id"));
				user.setName(rs.getString("name"));
				user.setBefore(rs.getString("before"));
				user.setAfter(rs.getString("after"));
				user.setTime(rs.getString("time"));
				user.setYstyle(rs.getString("ystyle"));
				showlist.add(user);
				System.out.println("111111");
			}
			return showlist;
		}
		catch (SQLException SqlE) {
			SqlE.printStackTrace();
			return null;
		} 
		catch (Exception E) {
			E.printStackTrace();
			return null;
		} 
		finally {
			// 关闭连接，释放数据库资源：
			db_conn.CloseDB();
		}
	}
 
 public int add(Huser user)
	{
		db_conn.ConnectDB();
		try {
			String sql = "insert into diaodong(id,name,before,after,time,ystyle)"+
			    "values("+user.getId()+",'" +
			    user.getName()+ "','" + 
			    user.getBefore()+"','" + 
			    user.getAfter()+"','" + 
			    user.getTime()+"','"+ 
			    user.getYstyle()+"')";
			System.out.println(sql);
		int i = db_conn.stmt.executeUpdate(sql); // 执行sql语句
		return i;
	
		
	}
		catch (SQLException SqlE){
			SqlE.printStackTrace();
			return -1;
		} 
		catch (Exception E) {
			E.printStackTrace();
			return -2;
		} 
		finally {
			// 关闭连接，释放数据库资源：
			db_conn.CloseDB();
		}
	}
	
	public int chang(Huser user)
	{
		db_conn.ConnectDB();
		try {
			String sql = "update diaodong set name='"+
			user.getName()+"',before='"+
			user.getBefore()+"',after='"+
			user.getAfter()+"',time='"+
			user.getTime()+"',ystyle='"+
			user.getYstyle()+"' where id="+
			user.getId();
			int i = db_conn.stmt.executeUpdate(sql); // 执行sql语句
			return i;
		
			
		    }
			catch (SQLException SqlE){
				SqlE.printStackTrace();
				return -1;
			} 
			catch (Exception E) {
				E.printStackTrace();
				return -2;
			} 
			finally {
				// 关闭连接，释放数据库资源：
				db_conn.CloseDB();
			}
		}
	
	public int delete(int id)
	{
		db_conn.ConnectDB();
		try {
			String sql="delete from diaodong where id="+id+"";
			int i = db_conn.stmt.executeUpdate(sql);
		return i;
		}
		catch (SQLException SqlE){
			SqlE.printStackTrace();
			return -1;
		} 
		catch (Exception E) {
			E.printStackTrace();
			return -2;
		} 
		finally {
			// 关闭连接，释放数据库资源：
			db_conn.CloseDB();
		}
	}
	
	public Collection getPage(int start,int size)
	{
		System.out.println(start+","+size);
	 
		db_conn.ConnectDB();
		Collection showlist=new ArrayList();
		ResultSet rs = null;
		try{
			String sql="select * from diaodong  order by id asc";
			rs = db_conn.stmt.executeQuery(sql); 
			Huser user = null;
			int i=1;
			while(rs.next())
			{ 
				if((i>=start)&&(i<start+size))
				{user=new Huser();
				user.setId(rs.getInt("id"));
				user.setName(rs.getString("name"));
				user.setBefore(rs.getString("before"));
				user.setAfter(rs.getString("after"));
				user.setTime(rs.getString("time"));
				user.setYstyle(rs.getString("ystyle"));
				showlist.add(user);
				}
				i=i+1;
			}
			return showlist;
		}
		catch (SQLException SqlE) {
			SqlE.printStackTrace();
			return null;
		} 
		catch (Exception E) {
			E.printStackTrace();
			return null;
		} 
		finally {
			// 关闭连接，释放数据库资源：
			db_conn.CloseDB();
		}		
	}
}