js正则表达式.test方法验证，只能输入六位数字，但为什么大于6位的数字都可以通过验证也可以通过验证

[good_guy_cool_guy]

var reg=new RegExp("^[0-9]{6}$");
		var val=form.id.value;
		if(!reg.test(val)){
		document.getElementById('idcheck').innerHTML="请正确的工号！（工号只能包含6位数字）";
		result=false;
		}

[游北亮]

我验证没有问题，

var reg=new RegExp("^[0-9]{6}$");
alert(reg.test("1234567"));

[good_guy_cool_guy]

引用 1 楼 youbl 的回复:

我验证没有问题，

var reg=new RegExp("^[0-9]{6}$");
alert(reg.test("1234567"));

我把tomcat重启了一下也可以了，谢谢

[游北亮]

引用 2 楼 good_guy_cool_guy 的回复:

[quote=引用 1 楼 youbl 的回复:] 我验证没有问题，

var reg=new RegExp("^[0-9]{6}$");
alert(reg.test("1234567"));

我把tomcat重启了一下也可以了，谢谢[/quote] 嗯，说明你碰到的是浏览器缓存问题，下次你可以用Ctrl+F5强制刷新浏览器， 或者在浏览器上按F12，查看下载得到的源文件，看看内容肯定还是你没修改过的内容

[good_guy_cool_guy]

本来可以跑，突然间有了这个错，然后改回当初可以跑的样子，依旧不可以 错误页面： HTTP Status 500 – Internal Server Error Type Exception Report Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception java.lang.NullPointerException com.shop.servlet.LoginServlet.doPost(LoginServlet.java:48) com.shop.servlet.LoginServlet.doGet(LoginServlet.java:36) javax.servlet.http.HttpServlet.service(HttpServlet.java:634) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) Note The full stack trace of the root cause is available in the server logs.

package com.shop.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.shop.service.LoginService;
import com.shop.vo.User;

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
		private static final long serialVersionUID = 1L;
	       
	    /**
	     * @see HttpServlet#HttpServlet()
	     */
	    public LoginServlet() {
	        super();
	        // TODO Auto-generated constructor stub
	    }
	
		/**
		 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
		 */
		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
			// TODO Auto-generated method stub
			//response.getWriter().append("Served at: ").append(request.getContextPath());
			doPost(request, response);
		}
	
		/**
		 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
		 */
		protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
			// TODO Auto-generated method stub
			//doGet(request, response);
			request.setCharacterEncoding("UTF-8");
			response.setCharacterEncoding("UTF-8");
			String flag=request.getParameter("flag");
			if (flag.equals("regist")) {
				String id=request.getParameter("id");
				String name=request.getParameter("name");
				String pwd =request.getParameter("password");
				LoginService lservice=new LoginService();
				try {
					int isMsg=lservice.regist(id.trim(),name.trim(), pwd.trim());
					if (isMsg==1) {
						//request.setAttribute("msg", "1");
						response.sendRedirect("register&login/login.jsp");
					}
					else if (isMsg==0) {
						response.setContentType("text/html; charset=UTF-8");
						PrintWriter out = response.getWriter();
						out.flush();
						out.println("<script>");
						out.println("alert('注册失败，请稍后重试。');");
						out.println("history.back();");
						out.println("</script>");
						response.sendRedirect("register&login/login.jsp");	
					}
				}
				catch (Exception e) {
					// TODO: handle exception
					e.printStackTrace();
				}
			}
			else if (flag.equals("login")) {
				String id=request.getParameter("id");
				String pwd=request.getParameter("password");
				LoginService lService=new LoginService();
				try {
					User us=lService.login(id.trim(), pwd.trim());
					if(us!=null) {
						response.sendRedirect("");
					}
					else {					
						response.setContentType("text/html; charset=UTF-8");
						PrintWriter out = response.getWriter();
						out.flush();
						out.println("<script>");
						out.println("alert('账户或密码错误');");
						out.println("history.back();");
						out.println("</script>");
						//response.sendRedirect("register&login/login.jsp");					
					}
				}
				catch (Exception e) {
					// TODO: handle exception
					e.printStackTrace();
				}
			}
		}
}