版权声明：随意转载。 https://blog.csdn.net/dengjili/article/details/83692928
服务器端操作Cookies
客户端每次请求都会附带cookies信息
服务端向前台写入Cookies
服务端代码
@WebServlet("/CookieServlet")
public class CookieServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// Cookie 处理需要对中文进行编码与解码
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 定义一个cookie对象
Cookie cookie = new Cookie("color", URLEncoder.encode("黄色", "UTF-8"));
Cookie name = new Cookie("name", URLEncoder.encode("zhang三", "UTF-8"));
// 设置过期时间为24小时,以秒为单位
cookie.setMaxAge(60 * 60 * 24);
name.setMaxAge(60 * 60 * 1);
// 添加cookie
response.addCookie(cookie);
response.addCookie(name);
request.getRequestDispatcher("/cookie.html").forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
页面展示端
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport"
content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<title>提交表单测试</title>
</head>
<body>
<form action="ReadCookieServlet" method="get">
<h2>提交表单测试</h2>
<p>
名称：<input type="text" name="txtName" id="txtName1" />
</p>
<p>
价格：<input type="text" name="txtPrice" id="txtPrice1" value="888"
readonly="readonly" />
</p>
<p>
数量：<input type="text" name="txtAmount" id="txtAmount1" value="999"
disabled="disabled" />
</p>
<input type="hidden" id="key" value="123445"> <input
type="submit" value="提交" />
</form>
</body>
</html>
测试，已经写入
客户端向服务端请求，传递Cookies
前台代码为上面页面共用html
服务端代码
@WebServlet("/ReadCookieServlet")
public class ReadCookieServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// Cookie 处理需要对中文进行编码与解码
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
Map<String, String> returnMap = new HashMap<>();
Cookie[] cookies = request.getCookies();
for (Cookie cookie : cookies) {
String name = cookie.getName();
String value = URLDecoder.decode(cookie.getValue(), "UTF-8");
returnMap.put(name, value);
}
Map<String, String[]> parameterMap = request.getParameterMap();
for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {
returnMap.put(entry.getKey(), entry.getValue()[0]);
}
// 设置响应内容类型
response.setContentType("text/html;charset=UTF-8");
response.getWriter().println(returnMap);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
测试，点击提交
取出浏览器的cookies信息
客户端端操作Cookies
操作cookies的库
https://github.com/js-cookie/js-cookie
对应html代码
扫描二维码关注公众号，回复：
4267432 查看本文章
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>客户端读写Cookie</title>
<!-- 第三方操作cookies -->
<script src="js/js.cookie.min.js" type="text/javascript"></script>
<script type="text/javascript">
function writeCookie() {
var key = document.getElementById("key").value;
var value = document.getElementById("value").value;
var expire = document.getElementById("expire").value;
//在当前域下写入cookie
Cookies.set(key, value, { expires: 7 });
alert("操作成功");
}
function readCookie() {
//在当前域根据key读取cookie
var key = document.getElementById("key").value;
var value = Cookies.get(key);
alert("值：" + value);
}
function removeCookie() {
//在当前域指定的cookie
var key = document.getElementById("key").value;
Cookies.remove(key, { path: '/' });
alert("清除：" + key);
}
</script>
</head>
<body>
<button type="button" onclick="writeCookie();">写</button>
<button type="button" onclick="readCookie();">读</button>
<button type="button" onclick="removeCookie();">清除</button>
<div>
<p>
key:<input type="text" id="key" />
</p>
<p>
value:<input type="text" id="value" />
</p>
<p>
expire:<input type="text" id="expire" />
</p>
</div>
</body>
</html>
测试写
测试读
