Garbled characters appear when exporting EXCEL (HTML format) in JSP

The problem encountered in reality is: Export EXCEL 1. Use UTF-8 encoding only output header, no output data, garbled; when there is data output, it will not garbled. 2. Use GB2312 encoding output with the UTF-8 on the contrary, there are data garbled, only the header is not garbled. Jsp page code: Jsp code: <% @ page language = "java" contentType = "text/html; charset = UTF-8" %> HTML code: Html code: <meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"> cause: the generated EXCEL file is HTML not JSP