Message An invalid character [32] was present in the Cookie value Description The server encountere_response.addcookie(cookie)报错an invalid character [-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_45046181/article/details/121974869

博客讨论了在使用Tomcat时遇到的HTTP 500错误，原因是Cookie值包含无效字符（空格）。文章指出，该版本的Tomcat不支持特殊字符，并提供了解决方案，即对Cookie值进行URL编码和解码，以确保其符合规范。

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报错信息

HTTP Status 500 – Internal Server Error
Type Exception Report

Message An invalid character [32] was present in the Cookie value

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.lang.IllegalArgumentException: An invalid character [32] was present in the Cookie value
org.apache.tomcat.util.http.Rfc6265CookieProcessor.validateCookieValue(Rfc6265CookieProcessor.java:182)
org.apache.tomcat.util.http.Rfc6265CookieProcessor.generateHeader(Rfc6265CookieProcessor.java:115)
org.apache.catalina.connector.Response.generateCookieString(Response.java:1019)
org.apache.catalina.connector.Response.addCookie(Response.java:967)
org.apache.catalina.connector.ResponseFacade.addCookie(ResponseFacade.java:386)
com.sadhu.cookieEg.cookieTest.doPost(cookieTest.java:50)
com.sadhu.cookieEg.cookieTest.doGet(cookieTest.java:58)
javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.
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报错原因：

这个版本的tomcat不能处理特殊符号。32在ASCII编码中恰好是空格

解决办法

转码，转成URL编码，用的时候再转回来

String value = "a b";
//URL编码
value = URLEncoder.encode(value,"utf-8");

//URL解码
value = URLDecoder.decode(value,"utf-8");