Question

我有一个锚点，我希望它链接到LogoutServlet，以便它会破坏会话并将其重定向回登录页面。

LogoutServlet.java

package pkg;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* Servlet implementation class LogoutServlet
 */
 public class LogoutServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
 * @see HttpServlet#HttpServlet()
 */
public LogoutServlet() {
    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
}

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub

    response.setHeader("Cache-Control", "no-cache, no-store");
    response.setHeader("Pragma", "no-cache");

    request.getSession().invalidate();
     RequestDispatcher rd = request.getRequestDispatcher("Login.html");
        rd.forward(request, response);
}

}

标签

<a href="/Assignment/LogoutServlet" accesskey="1" title="">Logout</a>

这是实施它的正确方法吗？我用过这个，但它没有将我重定向到Login.html。

Answer 1

这将使用doGet方法而不是doPost方法。这样的锚链接是HTTP GET请求。

如果您希望发出POST请求，则需要使用POST方法向servlet提交表单。

将代码移至doGet而不是doPost，然后尝试。

Answer 2

使用doGet方法。一个href将使用GET方法。

使用<a href=""> to link to servlet</a>

2 个答案: