个人笔记：
重写ActionServlet的process方法。
public class MyActionServlet extends ActionServlet {
@Override
protected void process(HttpServletRequest request,
HttpServletResponse response) throws IOException, ServletException {
response.setCharacterEncoding("GBK");
request.setCharacterEncoding("GBK");
super.process(request, response);
}
}
web.xml改为：
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>test.lxy.action.base.MyActionServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
