报错出现

java.lang.IllegalArgumentException: Control character in cookie value or attribute.

at org.apache.tomcat.util.http.CookieSupport.isHttpSeparator(CookieSupport.java:205)

at org.apache.tomcat.util.http.CookieSupport.isHttpToken(CookieSupport.java:229)

at org.apache.tomcat.util.http.ServerCookie.appendCookieValue(ServerCookie.java:185)

at org.apache.catalina.connector.Response.generateCookieString(Response.java:1054)

at org.apache.catalina.connector.Response.addCookie(Response.java:996)

at org.apache.catalina.connector.ResponseFacade.addCookie(ResponseFacade.java:380)

at cn.lonecloud.CookieServlet.doGet(CookieServlet.java:18)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

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:218)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

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");
示例：
　　

CookieServlet.java  生成cookies

 package cn.lonecloud;

 import java.io.IOException;

 import java.net.URLEncoder;

 import javax.servlet.ServletException;

 import javax.servlet.http.Cookie;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 public class CookieServlet extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         //该字符含有中文

         String s="测试cookies";

         String encode = URLEncoder.encode(s,"UTF-8");

         Cookie cookie=new Cookie("Hello", encode);

         response.addCookie(cookie);

         response.getWriter().append("dssd");

     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

     }

 }

GetCookies.java  获取cookies

 package cn.lonecloud;

 import java.io.IOException;

 import java.net.URLDecoder;

 import javax.servlet.ServletException;

 import javax.servlet.http.Cookie;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 public class GetCookies extends HttpServlet {

     @Override

     protected void doGet(HttpServletRequest req, HttpServletResponse resp)

             throws ServletException, IOException {

             Cookie[] cookies = req.getCookies();

             for (Cookie cookie : cookies) {

                 String value = cookie.getValue();

                 String decode = URLDecoder.decode(value, "UTF-8");

                 resp.setCharacterEncoding("UTF-8");

                 resp.getWriter().append(decode);

             }

     }

     @Override

     protected void doPost(HttpServletRequest req, HttpServletResponse resp)

             throws ServletException, IOException {

     }

 }

web.xml  配置文件

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app version="3.0"

     xmlns="http://java.sun.com/xml/ns/javaee"

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

   <servlet>

     <servlet-name>CookieServlet</servlet-name>

     <servlet-class>cn.lonecloud.CookieServlet</servlet-class>

   </servlet>

   <servlet-mapping>

     <servlet-name>CookieServlet</servlet-name>

     <url-pattern>/CookieServlet</url-pattern>

   </servlet-mapping>

   <servlet>

       <servlet-name>getCookies</servlet-name>

       <servlet-class>cn.lonecloud.GetCookies</servlet-class>

   </servlet>

   <servlet-mapping>

       <servlet-name>getCookies</servlet-name>

       <url-pattern>/getCoookies</url-pattern>

   </servlet-mapping>

 </web-app>