java.lang.IllegalArgumentException: Control character: 968f in cookie value or attribute.
at org.apache.tomcat.util.http.CookieSupport.isV0Separator(CookieSupport.java:157)
at org.apache.tomcat.util.http.CookieSupport.isV0Token(CookieSupport.java:182)
at org.apache.tomcat.util.http.ServerCookie.appendCookieValue(ServerCookie.java:186)
at org.apache.catalina.connector.Response.generateCookieString(Response.java:1070)
at org.apache.catalina.connector.Response.addCookie(Response.java:1012)
at org.apache.catalina.connector.ResponseFacade.addCookie(ResponseFacade.java:380)
at com.asiainfo.retail.auth.filter.IsLoginFilter.setCookie(IsLoginFilter.java:141)
at com.asiainfo.retail.auth.filter.IsLoginFilter.doFilter(IsLoginFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1080)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
该报错是由于这个中文的编码的问题中文采用的是unicode编码，而英文采用的是ASCII编码，所以当Cookie保存中文的时候需要对中文进行编码，而且从Cookie中取出内容的时候也要进行解码，编码和解码可以使用：
URLEncoder.encode(name, "utf-8");
URLDecoder.decode(cookies[i].getName(), "utf-8");
解决设置cookie报非法参数异常问题。