- web.xml中的 /: 代表项目根路径
http://localhost:8888/Servlet25Project/
- jsp中的/: 服务器根路径
http://localhost:8888/
- ../ 表示返回上一层目录
自定义创建包下的jsp与Servlet之间的跳转案例
1. 文件目录
2. login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
<form action="../LoginServlet" method="post">
用户名：<input type="text" name="uname"><br/>
密码： <input type="password" name="upwd"><br/>
<input type="submit" value="登录">
</form><br/>
${sessionScope.error}<br/>
</body>
</html>2. LoginServlet
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public LoginServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String uName=request.getParameter("uname");
String uPwd=""+request.getParameter("upwd");
// System.out.println(uName+uPwd);
if("admin".equals(uName)&&"admin".equals(uPwd)) {
request.getSession().setAttribute("name", uName);
response.sendRedirect("test6/welcome.jsp");
}else {
request.getSession().setAttribute("error", "账户或密码错误，请重新输入！");
response.sendRedirect("test6/login.jsp");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
3. welcome.jsp
<body>
登录成功！<br/>
<%//String name=(String)session.getAttribute("name"); //session.getAttribute("name")%>
你好，<%=session.getAttribute("name") %>
</body>