【smbms】密码修改流程

（servlet）

//实现servlet复用
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //从session获取id
        Object o=req.getSession().getAttribute(Constants.USER_SESSION);

        String newpassword=req.getParameter("newpassword");
        boolean flag=false;
        System.out.println("newpassword1"+newpassword);
        if(o!=null&&!StringUtils.isNullOrEmpty(newpassword))
        {
            UserService userService=new UserServiceImp1();

            flag=userService.updatePwd(((User)o).getId(),newpassword);

            if(flag)
            {
                System.out.println("newpassword flag"+newpassword);
                req.setAttribute("message","修改密码成功 请重新登录");
                //修改完密码 移除session
                req.getSession().removeAttribute(Constants.USER_SESSION);

            }
            else
            {
                req.setAttribute("message","修改密码失败");
             }
        }
        else
        {
            req.setAttribute("message","新密码有问题");


        }
        req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp);
    }

（service）

  public boolean updatePwd(int id, String password) {
        Connection connection=null;
        boolean flag=false;
        System.out.println("newpassword service"+password);
        try {
            connection=BaseDao.getConnection();
            if(userDao.updatePwd(connection,id,password)>0)
            {
                flag=true;
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        finally {
            BaseDao.closeResource(connection,null,null);
        }
        return flag;
    }

（dao）

 public int updatePwd(Connection connection, int id, String password) {
        PreparedStatement pstm=null;
        //execute执行了几行的改动
        int execute=0;
        if(connection!=null)
        {
            String sql="update smbms_user set userPassword = ? where id =?";
            Object params[]={password,id};
            System.out.println("newpassword dao"+password);
            try {
                execute=BaseDao.execute(connection,sql,params,pstm);
            } catch (Exception e) {
                e.printStackTrace();
            }
            BaseDao.closeResource(null,pstm,null);
        }

        return execute;
    }