<%@ page language="java" contentType="text/html; charset=utf-8"%> <%@ page import="java.io.*,java.nio.charset.Charset,java.lang.reflect.*"%> <% String encode = (String)request.getParameter("change_encode"); if (encode != null && !"".equals(encode.trim())){ System.setProperty("file.encoding",encode); Field charset = null; try { charset = Charset.class.getDeclaredField("defaultCharset"); charset.setAccessible(true); charset.set(null, null); } catch (Exception e) { e.printStackTrace(); } } %> java.nio.charset.Charset=<%= java.nio.charset.Charset.defaultCharset()%>