src/com/bdglxt/action/login_servlet.java

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package com.bdglxt.action;

import java.io.IOException;
import java.sql.ResultSet;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.bdglxt.dao.DB;
import com.bdglxt.orm.Yuangong;

public class login_servlet extends HttpServlet{
	public void service(HttpServletRequest req,HttpServletResponse res)throws ServletException, IOException 
	{
		String type=req.getParameter("type");
		
		if(type.endsWith("yuangong"))
		{
			yuangongLoing(req, res);
		}
		if(type.endsWith("admin"))
		{
			adminLogin(req, res);
		}
		if(type.endsWith("userpw"))
		{
			userpw(req, res);
		}
		
	}
	
	public void userpw(HttpServletRequest req,HttpServletResponse res){
		String oldPass = req.getParameter("userPw");
		String newpass = req.getParameter("userPw1");
		
		Yuangong yuangong = (Yuangong) req.getSession().getAttribute("userinfo");
		
		if(oldPass.equals(yuangong.getLoginPw())){
			String id = req.getParameter("id");
			String qx = req.getParameter("qx");
			String sql;
			if("2".equals(qx)){
				//管理员密码修改
				sql = "update t_admin set userPw='"+newpass+"'";
			}else{
				//普通员工密码修改
				sql = "update t_yuangong set loginPw='"+newpass+"' where id="+id;
			}
			
			Object[] params={};
			DB mydb=new DB();
			mydb.doUpdate(sql, params);
			mydb.closed();
			
			req.setAttribute("message", "操作成功!");
			req.setAttribute("path", "userPw.jsp");
			yuangong.setLoginPw(newpass);