Map<String, HttpSession> map=(Map<String, HttpSession>) getServletContext().getAttribute("users");

最新推荐文章于 2022-07-04 00:24:50 发布

最新推荐文章于 2022-07-04 00:24:50 发布 · 404 阅读

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#java

本文介绍了一个简单的Servlet实现，用于从服务器会话中踢出指定用户名的用户。通过获取请求参数中的用户名，从服务器上下文获取用户会话映射，并移除对应的会话。

package com.tfy.heima.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

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

public class KickServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String username=request.getParameter("username");

username=new String(username.getBytes("ISO-8859-1"),"UTF-8");
Map<String, HttpSession> map=(Map<String, HttpSession>) getServletContext().getAttribute("users");

HttpSession session=map.get(username);
if(session!=null){
session.removeAttribute("user");
map.remove(username);
}
out.write("踢出成功");
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doGet(request, response);
}

}