小丑__nice 小丑__nice
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大佬们,请问下 这个异常怎么解决啊? package cn.itacast.user.web.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.beanutils.BeanUtils; import cn.itcast.user.domain.User; import cn.itcast.user.service.UserException; import cn.itcast.user.service.UserService; public class RegistServlet extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); //依赖UserServlet UserService userService=new UserService(); /* * 1,封装表单数据(封装到User对象中) * * * */ User form=CommonUtils.toBean(request.getParameterMap(),User.class); /* * 新添加任务: * 校验验证码 * 1.用户填写的验证码已经封装到user中 * 2.从session获取真正的验证码 * 3.比较两者,不过不同,保存错误信息,保存表单数据,转发到regist.jsp * 4.如果相同,什么都不做,向下执行! * */ String sessionVerifyCode = (String) request.getSession().getAttribute("session_vcode"); if(sessionVerifyCode.equalsIgnoreCase(form.getVerifyCode())) { request.setAttribute("msg", "验证码错误"); request.setAttribute("user", form); request.getRequestDispatcher("/user/regist.jsp").forward(request,response); return; } /* * 2.调用userService的regist()方法,传递form过去 *3.得到异常:获取异常信息,保存到request域,转发到regist.jsp中显示 *4.没有异常:输处注册成功 * * */ try{ userService.regist(form); response.getWriter().print("<h1>注册成功!</h1><a href='"+request.getContextPath()+"/user/login.jsp"+"'>点击这里去登录</a>"); } catch (UserException e) { //获取异常信息,保存到request域 request.setAttribute("msg",e.getMessage()); //转发到regist.jsp request.getRequestDispatcher("/user/regist.jsp").forward(request,response); } } }
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