jsp通过form跳转到servlet出现404错误

Question

 jsp界面@WebServlet(asyncSupported = true, urlPatterns = { "/UserServlet" })public class UserServlet extends HttpServlet {protected void service(HttpServletRequest req,HttpServletResponse resp) throws ServletException,IOException{//设置请求编码格式req.setCharacterEncoding("utf-8");//设置响应编码格式resp.setContentType("text/html;charset=utf-8");//获取操作符String oper = req.getParameter("oper");if("login".equals(oper)){//调用登录处理方法checkUserLogin(req,resp);}else if("reg".equals(oper)){//调用注册功能感觉跳转后地址正确 不知道错在哪里

Answer 1

1. 其他请求是否正常

2. 路由配置是否正常