Question

我要在JSP中触发一个按钮，跳转到Servlet中下面是代码

<form action="${pageContext.request.contextPath}UsersClServlet?flag=addUser" method="post">其他的都没问题，但就是在跳转时网页显示无法找到该网页，Servlet的代码是if(flag.equals("addUser")){
System.out.println("调用UserClServlet处理器");
String name=request.getParameter("Uname");
String password=request.getParameter("Upassword");
String email=request.getParameter("email");
String grade=request.getParameter("grade");
UserBeanCl ubc=new UserBeanCl();
boolean b=ubc.addUser(name, password, email, grade);
System.out.print(b);

if(b==true){
request.getRequestDispatcher("suc.jsp").forward(request, response);
}else{
request.getRequestDispatcher("err.jsp").forward(request, response);
}
}

Answer 1

你改成 request.getRequestDispatcher("绝对路径").forward(request, response);
看看

Answer 2

${pageContext.request.contextPath}，貌似这后面要加个"/"

Answer 3

form action="${pageContext.request.contextPath}/UsersClServlet?flag=addUser