01 九 10 p3p java实践

说干就干，要跨域，那么就要有两个域名，本机测试，只要指host就行了。host设置如下：
127.0.0.1 www.a.com
127.0.0.1 www.b.com
接着开始上代码：
http://www.b.com/b.jsp 通过js设置a的cookie
================
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%
response.addHeader("Cache-Control","no-cache");
response.addHeader("Expires","Thu,01 Jan 1970 00:00:01 GMT");
cookiev = "test";
%>

================
http://www.a.com/a_setcookie.jsp www.a.com下的cookie设置
================
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%
response.setHeader("P3P","CP=\"CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR\"");

String cookiev = request.getParameter("cookiev");
Cookie _cookie = new Cookie("test",cookiev );
_cookie.setMaxAge(30*60*100);
_cookie.setPath("/");
_cookie.setDomain(".a.com");
response.addCookie(_cookie);
%>
================
http://www.a.com/a_getcookie.jsp www.a.com下的cookie遍历
================
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%
Cookie cookies[]=request.getCookies();
Cookie sCookie = null;
if(cookies==null){
out.print("none any cookie");
}else{
out.println(cookies.length+"
“);
for(int i=0;i sCookie = cookies[i];
out.println("getVersion==>>>”+sCookie.getVersion()+”\n”);
out.println(“cookiename==>>>”+sCookie.getName()+”->cookievalue==>>>”+sCookie.getValue()+”
“);
}
}
%>
================
花絮：在firefox下可以不用设置response头的p3p申明，而ie是必须的。