基于Java web的学生选课系统（源码+数据库+运行视频）.zip

package service; import java.sql.ResultSet; import java.sql.SQLException; import javax.servlet.http.HttpSession; import model.TAdmin; import model.Tlaoshi; import model.Txuesheng; import org.directwebremoting.WebContext; import org.directwebremoting.WebContextFactory; import util.DB; public class loginService { public String login(String userName,String userPw,int userType) { System.out.println("userType"+userType); try { Thread.sleep(700); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } String result="no"; if(userType==0)//系统管理员登陆 { String sql="select * from t_admin where userName=? and userPw=?"; Object[] params={userName,userPw}; DB mydb=new DB(); mydb.doPstm(sql, params); try { ResultSet rs=mydb.getRs(); boolean mark=(rs==null||!rs.next()?false:true); if(mark==false) { result="no"; } else { result="yes"; TAdmin admin=new TAdmin(); admin.setUserId(rs.getInt("userId")); admin.setUserName(rs.getString("userName")); admin.setUserPw(rs.getString("userPw")); WebContext ctx = WebContextFactory.get(); HttpSession session=ctx.getSession(); session.setAttribute("userType", 0); session.setAttribute("admin", admin); } rs.close(); } catch (SQLException e) { System.out.println("登录失败！"); e.printStackTrace(); } finally { mydb.closed(); } } if(userType==1) { String sql="select * from t_laoshi where del='no' and loginname=? and loginpw=?"; Object[] params={userName,userPw}; DB mydb=new DB(); mydb.doPstm(sql, params); try { ResultSet rs=mydb.getRs(); boolean mark=(rs==null||!rs.next()?false:true); if(mark==false) { result="no"; } else { result="yes"; Tlaoshi laoshi=new Tlaoshi(); laoshi.setId(rs.getInt("id")); laoshi.setBianhao(rs.getString("bianhao")); laoshi.setXingming(rs.getString("xingming")); laoshi.setXingbie(rs.getString("xingbie")); laoshi.setNianling(rs.getString("nianling")); laoshi.setZhicheng(rs.getString("zhicheng")); laoshi.setLoginname(rs.getString("loginname")); laoshi.setLoginpw(rs.getString("loginpw")); laoshi.setDel(rs.getString("del")); WebContext ctx = WebContextFactory.get(); HttpSession session=ctx.getSession(); session.setAttribute("userType", 1); session.setAttribute("laoshi", laoshi); } rs.close(); } catch (SQLException e) { System.out.println("登录失败！"); e.printStackTrace(); } finally { mydb.closed(); } } if(userType==2) { String sql="select * from t_xuesheng where del='no' and loginname=? and loginpw=?"; Object[] params={userName,userPw}; DB mydb=new DB(); mydb.doPstm(sql, params); try { ResultSet rs=mydb.getRs(); boolean mark=(rs==null||!rs.next()?false:true); if(mark==false) { result="no"; } else { result="yes"; Txuesheng xuesheng=new Txuesheng(); xuesheng.setId(rs.getInt("id")); xuesheng.setXuehao(rs.getString("xuehao")); xuesheng.setXingming(rs.getString("xingming")); xuesheng.setXingbie(rs.getString("xingbie")); xuesheng.setNianling(rs.getString("nianling")); xuesheng.setBanji(rs.getString("banji")); xuesheng.setLoginname(rs.getString("loginname")); xuesheng.setLoginpw(rs.getString("loginpw")); xuesheng.setDel(rs.getString("del")); WebContext ctx = WebContextFactory.get(); HttpSession session=ctx.getSession(); session.setAttribute("userType", 2); session.setAttribute("xuesheng", xuesheng); } rs.close(); } catch (SQLException e) { System.out.println("登录失败！"); e.printStackTrace(); } finally { mydb.closed(); } } return result; } public String adminPwEdit(String userPwNew) { System.out.println("DDDD"); try { Thread.sleep(700); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } WebContext ctx = WebContextFactory.get(); HttpSession session=ctx.getSession(); TAdmin admin=(TAdmin)session.getAttribute("admin"); String sql="update t_admin set userPw=? where userId=?"; Object[] params={userPwNew,admin.getUserId()}; DB mydb=new DB(); mydb.doPstm(sql, params); return "yes"; } }