java.lang.IllegalArgumentException: Control character in cookie value or attribute.
at org.apache.tomcat.util.http.CookieSupport.isV0Separator(CookieSupport.java:155)
at org.apache.tomcat.util.http.Cookies.processCookieHeader(Cookies.java:323)
at org.apache.tomcat.util.http.Cookies.processCookies(Cookies.java:157)
at org.apache.tomcat.util.http.Cookies.getCookieCount(Cookies.java:98)
at org.apache.catalina.connector.CoyoteAdapter.parseSessionCookiesId(CoyoteAdapter.java:913)
at org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:683)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:400)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
出现上面的错误主要是cookie中存在中文或特殊符号造成的，tomcat7不支持导致。
解决办法：
1、先删除本地cookie，否则项目无法访问。
2、然后调整编码原因是有关中文编码的问题，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")