网上现在有很多关于跨域设置cookie的文章,但大多数都是php的文章,网上仍然有很多关于jsp p3p的设置,但是必须要将浏览器的隐私设置成低才可以跨域设置cookie.查了n多文章发现他们都搞错了!(真郁闷死了,自己没有解决干什么要贴在自己的博客中?!害得我好惨!^@^)
下面是一个例子:
首先在hosts文件中设置(其中的192.168.73.1为您本机的ip,我写成127.0.0.1不行,可能是公司的域的设置问题)
192.168.73.1 www.a.com
192.168.73.1 www.b.com
[1]编写文件
b_setcookie.jsp
- <%@ page contentType="text/html; charset=utf-8" %>
- <%
- response.addHeader("Cache-Control", "no-cache");
- response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT");
- String ssocookie="www.sso12345678910.com";
- %>
- <script src="http://www.a.com/mp/test/a_setcookie.jsp?id=<%=ssocookie%>">
- </script>
<%@ page contentType="text/html; charset=utf-8" %><%response.addHeader("Cache-Control", "no-cache");response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT");String ssocookie="www.sso12345678910.com";%><script src="//www.a.com/mp/test/a_setcookie.jsp?id=<%=ssocookie%>"></script>
a_setcookie.jsp
- <%
- response.setHeader("P3P","CP=\"CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR\"");
- String domainId=request.getParameter("id");
- Cookie _cookie=new Cookie("test",domainId);
- _cookie.setMaxAge(30*60*100);
- _cookie.setPath("/");
- response.addCookie(_cookie);
- %>
<%response.setHeader("P3P","CP=\"CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR\"");String domainId=request.getParameter("id");Cookie _cookie=new Cookie("test",domainId);_cookie.setMaxAge(30*60*100);_cookie.setPath("/");response.addCookie(_cookie);%>
a_getcookie.jsp
- <%@ page contentType="text/html; charset=utf-8" %>
- <%
- Cookie cookies[]=request.getCookies();
-
- Cookie sCookie=null;
- String sname=null;
- String name=null;
- if(cookies==null)
- out.print("none any cookie");
- else
- {
- out.print(cookies.length + "<br>");
- for(int i=0;i<cookies.length; i++)
- {
- sCookie=cookies[i];
- sname=sCookie.getName();
- name = sCookie.getValue();
- out.println("comment==>>>"+sCookie.getComment()+"\n");
- out.println("getDomain==>>>"+sCookie.getDomain()+"\n");
- out.println("getSecure==>>"+sCookie.getSecure()+"\n");
- out.println("getVersion==>>"+sCookie.getVersion()+"\n");
- out.println("cookiename==>>"+sname + "->" + "cookievalue==>>>"+name + "<br>");
- }
- }
- %>
<%@ page contentType="text/html; charset=utf-8" %><%Cookie cookies[]=request.getCookies(); // 将适用目录下所有Cookie读入并存入cookies数组中Cookie sCookie=null;String sname=null;String name=null;if(cookies==null) // 如果没有任何cookieout.print("none any cookie");else{out.print(cookies.length + "<br>");for(int i=0;i<cookies.length; i++) // 循环列出所有可用的Cookie{sCookie=cookies[i];sname=sCookie.getName();name = sCookie.getValue();out.println("comment==>>>"+sCookie.getComment()+"\n");out.println("getDomain==>>>"+sCookie.getDomain()+"\n");out.println("getSecure==>>"+sCookie.getSecure()+"\n");out.println("getVersion==>>"+sCookie.getVersion()+"\n");out.println("cookiename==>>"+sname + "->" + "cookievalue==>>>"+name + "<br>");}}%>
测试时依次请求
http://www.b.com/mp/test/b_setcookie.jsp
http://www.a.com/mp/test/a_getcookie.jsp
便可看到通过跨域设置的cookie的值!