继承ActionServlet实现request的编码转换

public class MyActionServlet extends ActionServlet{
 //重写process方法，实现编码的设置。
 protected void process（HttpServletRequest request，
       HttpServeltResponse response)
  throws ServletException{
  //设置编码方式
  request.setCharacterEncoding("utf-8");
  //调用父类方法
  super.process(request,response);
 }
};

在web.xml中配置MyActionServlet
<servlet>
 <servlet-name>action</servlet-name>
 <servlet-class>*.*.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>