Search the Internet a lot of information, finally found a way to understand.
Because Tomcat is ISO8859-1 encoded by default. So he changed him into a GB2312 in the web.xml.
In the JSP, you need to put the charset=gb2312
Like what:
Response.getparameter ("Text"); Ideally, the Chinese "Me" is passed.
But if by default, the online display is ".... ”
This parameter is not even garbled .... Suddenly heart desolate ...
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Solution:
(1) The Web.xml encoding of Tomcat is modified into GB2312.
(2) String A=new string (Response.getparameter ("Text"). GetBytes ("Iso8859-1"), "GB2312");
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Although the code is not beautiful, but how to say that solves the problem ...