<filter-mappping>改这样,
<filter-mappping>
<filter-name>testfilter</filter-name>
<url-pattern>Login</url-pattern>
</filter-mapping>
另外,你的编码真不规范
<filter-mappping>
<filter-name>testfilter</filter-name>
<url-pattern>Login</url-pattern>
</filter-mapping>
另外,你的编码真不规范
// Overrides the name of the character encoding used in the body of this request.
req.setCharacterEncoding("gb2312");
out.close();
试试看