种子(seed),裸子植物和被子植物特有的繁殖体,它由胚珠经过传粉受精形成。种子一般由种皮、胚和胚乳3部分组成,有的植物成熟的种子只有种皮和胚两部分。
种子尘胡造句:一粒种子,可以无声无息地在泥土里腐烂掉,也可以长成参天大树。
在jsp/servlet中断点/多线程下载文件<%@ page import="java.io.File" %><%@ page import="java.io.IOException"则源 %><%@ page import="java.io.OutputStream" %><%@ page import="java.io.RandomAccessFile" %><%!public void downloadFile(HttpServletRequest request, HttpServletResponse response, File file) throws IOException {RandomAccessFile raf = new RandomAccessFile(file, "r") java.io.FileInputStream fis = new java.io.FileInputStream(raf.getFD()) response.setHeader("Server", "www.trydone.com") response.setHeader("Accept-Ranges", "bytes") long pos = 0 long len len = raf.length() if (request.getHeader("Range") != null) {response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT) pos = Long.parseLong(request.getHeader("Range").replaceAll("bytes="数哪, "").replaceAll("-", "")) }response.setHeader("Content-Length", Long.toString(len - pos)) if (pos != 0) {response.setHeader("Content-Range", new StringBuffer().append("bytes ").append(pos).append("-").append(Long.toString(len - 1)).append("/").append(len).toString()) }response.setContentType("application/octet-stream") response.setHeader("Content-Disposition", new StringBuffer().append("attachmentfilename=\"薯盯码").append(file.getName()).append("\"").toString()) raf.seek(pos) byte[] b = new byte[2048] int i OutputStream outs = response.getOutputStream() while ((i = raf.read(b)) != -1) {outs.write(b, 0, i) }raf.close() fis.close() }%><%String filePath = request.getParameter("file") filePath = application.getRealPath(filePath) File file = new File(filePath) downloadFile(request, response, file)%>
是否可以解决您的问题?
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)