cookie中存中文

来源：互联网发布：linux 清空回收站编辑：程序博客网时间：2024/04/30 03:23

what:

在cookie中存中文，tomcat会出现异常

why:

tomcat有对cookie合法性的校验，cookie中的有效字符为ascii码值在32-127之间，以及制表符\t。(查的)

how:

使用java.net.URLDecoder(解码)和java.net.URLEncoder(编码)

page1:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><%     String str0 = "abc";    String str = "cookie中的中文";    Cookie cook0 = new Cookie("str0",str0);    Cookie cook = new Cookie("str",java.net.URLEncoder.encode(str,"UTF-8"));    response.addCookie(cook0);    response.addCookie(cook);%>  </body></html>

page2:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>    <%        request.setCharacterEncoding("UTF-8");        Cookie[] c = request.getCookies();        for(int i=0; i<c.length; i++){            if(c[i].getName().equals("str")){    %>                <h1><%=c[i].getName() %>--><%=java.net.URLDecoder.decode(c[i].getValue(),"UTF-8")%></h1>    <%            }else{    %>                <h1><%=c[i].getName() %>--><%=c[i].getValue() %></h1>    <%            }        }    %></body></html>

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