action直接输出流

action 里边输出JS代码，已经测试成功，解决乱码问题：

HttpServletResponse response = (HttpServletResponse) ServletActionContext.getResponse();  
response.setCharacterEncoding("gb2312"); 
PrintWriter out = response.getWriter(); 
out.println("<script   type=\"text/javascript\"   language=\"javascript\">");   
out.println("alert(\"操作成功！\")");   
out.println("</script>");   
out.close(); return null