会话技术_Cookie_细节3_Cookie存储中文和会话技术_Cookie_细节4_Cookie共享

Cookie能不能存中文?

　　在tomcat 8 之前 Cookie中不能直接存储中文数据

　　 　　需要将中文数据转码--- 一般采用url编码（%E3）

　　在Tomcat 8 之后， cookie支持中文数据。

 

@WebServlet("/CookieDemo5")
public class CookieDemo5 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Cookie cookie1 = new Cookie("msg","你好");
        response.addCookie(cookie1);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

会话技术_Cookie_细节4_Cookie共享

假设在一个tomcat服务器中，部署了多个web项目，那么在这些web项目中cookie能不能共享？　　

　　默认情况下cookie不能共皁

setPath(string path):设置cookie的获取范围。默认情况下，设置当前的虚拟目录

　　如果要共享，则可以将path设置为”/"

不同的tomcat服务器间cookie共享问题?

　　　setDomain(String path):如果设置一级域名相同，那么多个服务器之间cookie可以共享

　　   setDomain(".baidu.com"),那么tieba.baidu.com和news.baidu.com中cookie可以共享

 

@WebServlet("/CookieDemo5")
public class CookieDemo5 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Cookie cookie1 = new Cookie("msg","你好");
        cookie1.setPath("/");
        response.addCookie(cookie1);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 

@WebServlet("/CookieDemo3")
public class CookieDemo3 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        Cookie cookie1 = new Cookie("msg","hello");
        Cookie cookie2 = new Cookie("name","zhangsan");
        response.addCookie(cookie1);
        response.addCookie(cookie2);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 

 

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