jsp中使用jstl导入html乱码问题解决方法

 Reader r = null;
      String charSet;
      String charSet;
      if ((this.charEncoding != null) && (!this.charEncoding.equals(""))) {
        charSet = this.charEncoding;
      }
      else {
        String contentType = uc.getContentType();
        if (contentType != null) {
          String charSet = Util.getContentTypeAttribute(contentType, "charset");
          if (charSet == null) charSet = "ISO-8859-1";
        }
        else {
          charSet = "ISO-8859-1";
        }
      }