- //读取cookie数组,之后迭代出各个cookie
- public void showCookies(HttpServletRequest request){
- Cookie[] cookies = request.getCookies();//根据请求数据,找到cookie数组
- if(null==cookies) {//如果没有cookie数组System.out.println("没有cookie");
- } else {
- for(Cookie cookie : cookies){
- System.out.println("cookieName:"+cookie.getName()+",cookieValue:"+ cookie.getValue());
- }
- }
- }
- //创建cookie,并将新cookie添加到"响应对象"response中。
- public void addCookie(HttpServletResponse response){
- Cookie cookie =newCookie("name_test","value_test");//创建新cookiecookie.setMaxAge(5 * 60);// 设置存在时间为5分钟cookie.setPath("/");//设置作用域response.addCookie(cookie);//将cookie添加到response的cookie数组中返回给客户端
- }
- //修改cookie,可以根据某个cookie的name修改它(不只是name要与被修改cookie一致,path、domain必须也要与被修改cookie一致)
- public void editCookie(HttpServletRequest request,HttpServletResponse response){
- Cookie[] cookies = request.getCookies();
- if(null==cookies) {
- System.out.println("没有cookies");
- } else {
- for(Cookie cookie : cookies){
- //迭代时如果发现与指定cookieName相同的cookie,就修改相关数据
- if(cookie.getName().equals("name_test")){
- cookie.setValue("new_value");//修改valuecookie.setPath("/");
- cookie.setMaxAge(10 * 60);// 修改存活时间response.addCookie(cookie);//将修改过的cookie存入response,替换掉旧的同名cookie
- break;
- }
- }
- }
- }
- //删除cookie
- public void delCookie(HttpServletRequest request,HttpServletResponse response){
- Cookie[] cookies = request.getCookies();
- if(null==cookies) {
- System.out.println("没有cookie");
- } else {
- for(Cookie cookie : cookies){
- //如果找到同名cookie,就将value设置为null,将存活时间设置为0,再替换掉原cookie,这样就相当于删除了。
- if(cookie.getName().equals("name_test")){
- cookie.setValue(null);
- cookie.setMaxAge(0);
- cookie.setPath("/");
- response.addCookie(cookie);
- break;
- }
- }
- }
- }
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