Login.jsp
<%@ page contentType="text/html; charset=utf-8" %>
Web.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
404是路径错误!你页面上是怎么调用的!<form action="getuserservlet" method="post">这样就ok啦!