servlet映射路径/代表根目录
@WebServlet("/user/logincheck")
重定向请求/代表根目录
request.getRequestDispatcher("/jsp/article/detail.jsp").forward(request, response);
跳转需要写根目录
response.sendRedirect(request.getContextPath()+"/index");
连接写根目录
<a href="${pageContext.request.contextPath}/user/Login">登录</a>
提交表单写根目录
<form action="${pageContext.request.contextPath}/user/login" method="post">
引文件写根目录
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/boot/css/bootstrap.css">
图片src写根目录
<img src="${pageContext.request.contextPath}/img/u=2416661752,241679740&fm=26&gp=0.jpg" alt="">
