struts2 输出内容到页面

  * 直接输出内容的简便函数
  *
  * eg. render("text/plain","hello","encoding:GBK")
  */
public static void render(final String contentType, final String content,
   final String... headers) {
  String encoding = "UTF-8";
  boolean nocache = true;
  try {
   for (String header : headers) {
    String headerName = StringUtils.substringBefore(header, ":");
    String headerValue = StringUtils.substringBefore(header, ":");
    if (StringUtils.equalsIgnoreCase(headerName, "encoding")) {
     encoding = headerValue;
    } else if (StringUtils.equalsIgnoreCase(headerName, "no-cache")) {
     nocache = Boolean.parseBoolean(headerValue);
    } else {
     throw new Exception("不是一个合法的header类型");
    }
   }
   HttpServletResponse response = ServletActionContext.getResponse();
   String fullContentType = contentType+";charset="+encoding;
   response.setContentType(fullContentType);
   if(nocache){
    response.setHeader("Pragma", "No-cache");
    response.setHeader("Cache-Control", "no-cache");
    response.setDateHeader("Expirse", 0);
   }
   response.getWriter().write(content);
  } catch (Exception e) {
  }
}