Cookie
Cookie是客户端技术，程序把每个用户的数据以cookie的形式写给用户各自的浏览器。当用户使用浏览器再去访问服务器中的web资源时，就会带着各自的数据去。这样，web资源处理的就是用户各自的数据了。
1.在java中增加一个cookie
Cookie cookie =newCookie("mytest","123456");
response.addCookie(cookie);
2.在java中修改一个cookie
Cookie[] cookies = request.getCookies();for(Cookie cookie : cookies) {
if("mytest".equals(cookie.getName())) {
cookie.setValue("mytestNEW");
response.addCookie(cookie);
}
}
3.怎么在java中删除一个cookie
Cookie[] cookies = request.getCookies();for(Cookie cookie : cookies) {
if("mytest".equals(cookie.getName())) {
cookie.setMaxAge(0);
response.addCookie(cookie);
}
}
4.怎么在java中显示cookie列表
Cookie[] cookies = request.getCookies();for(Cookie cookie : cookies) {
try {
response.getWriter().println(cookie.getName() + "-->" + cookie.getValue());
} catch(IOException e) { e.printStackTrace(); }
}
5.怎么在java中增加一个中文cookie
Cookie cookie;try {
cookie =newCookie("mytest",URLEncoder.encode("我的测试", "UTF-8"));
response.addCookie(cookie);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
6.怎么在java中显示中文cookie值
Cookie[] cookies = request.getCookies();for(Cookie cookie : cookies) {
if("mytest".equals(cookie.getName())) {
try{ response.getWriter().println(URLDecoder.decode(cookie.getValue(), "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
7.怎么在java中根据cookie名称获得cookie值
Cookie[] cookies = request.getCookies();for(Cookie cookie : cookies) {
if("mytest".equals(cookie.getName())) {
try {
response.getWriter().println(cookie.getName() + "-->" + cookie.getValue());
} catch (IOException e) {
e.printStackTrace();
}
}
}
8.怎么在java中设置cookie路径
Cookie cookie1 =newCookie("mytest","mytest1");
cookie1.setPath("/test1");
Cookie cookie2 =newCookie("mytest","mytest2");
cookie2.setPath("/test2");
response.addCookie(cookie1);
response.addCookie(cookie2);
9.怎么在java中设置cookie过期时间为60秒
Cookie cookie =newCookie("mytest","mytest1");
cookie.setMaxAge(60);
response.addCookie(cookie);
10.怎么在java中设置cookie域名
Cookie cookie =newCookie("mytest","mytest1");
cookie.setDomain("127.0.0.1");
response.addCookie(cookie);
