jsp 中文件上传

以下是代码：String fileName = ＂ ＂; String appPath = request.getSession().getServletContext().getRealPath(＂/＂) ; DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(cacheSize)； //缓冲大小 File temFile = new File(appPath+tempFileFold)； //超过缓冲小放在临时文件夹，再一步一步上传 if(!temFile.exists()){ temFile.mkdirs(); } factory.setRepository(temFile); ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(maxFileSize)； //最大大小 List fileList = null ; try { fileList = upload.parseRequest(request); } catch (FileUploadException e) { if (e instanceof SizeLimitExceededException) { System.out.println（＂超过大小了，返回！＂）； double maxSize = maxFileSize/(1024.0*1024.0); if(maxSize>1.0){ float fileSize = Math.round(maxSize*1000)/1000; request.setAttribute(＂message＂, MessageResource.readByString(＂file_size_overflow＂)+fileSize+＂M＂); }else{ double kMaxSize = maxFileSize/(1024.0); float fileSize = Math.round(kMaxSize*100)/100; request.setAttribute(＂message＂, MessageResource.readByString(＂file_size_overflow＂)+fileSize+＂K＂); } request.setAttribute(＂page＂, request.getParameter(＂failpage＂)); System.out.println(＂page:＂+request.getAttribute(＂page＂)+＂ messgae:＂+request.getAttribute(＂message＂)); return ＂＂; } e.printStackTrace(); } if (fileList == null || fileList.size() == 0) { System.out.println（＂空文件，返回！＂）； return ＂＂； } // 得到所有上传的文件 Iterator fileItr = fileList.iterator（)； // 循环处理所有文件 while (fileItr.hasNext()) { FileItem fileItem = null; String path = null; long size = 0； // 得到当前文件 fileItem = (FileItem) fileItr.next（)； // 忽略简单form字段而不是上传域的文件域（等） if (fileItem == null || fileItem.isFormField()) { continue； } // 得到文件的完整路径 path = fileItem.getName（)； // 得到文件的大小 size = fileItem.getSize(); if (＂＂.equals(path) || size == 0) { System.out.println（＂空文件2，返回！＂）； return ＂＂ ; }

jsp上传了xls文件。

Servlet这边怎么接收？详情看下面代码

获取文件，需要用到上传/下载组件，比如用SmartUpload，获取页面上传的excel.xls文件：SmartUpload su = new SmartUpload（)；//新建一个SmartUpload对象su.getRequest().getParameterValues（)；取数组值，因为文件流都是2进制，然后再用文件流写成文件即可。

jsp页面部分内容导出生成word文档？

jsp页面导出为word文件需要利用apache的POI来完成。

核心代码如下：其实如果用框架做就方便多了，比如Struts2。

在Action里直接写如下代码： if(out!=null){ String fileName=＂＂; fileName+=＂评价报告.doc＂; try { HttpServletResponse response = ServletActionContext.getResponse(); response.setHeader(＂Content-disposition＂,＂attachment; filename=＂+new String(fileName.getBytes(＂GB2312＂), ＂8859_1＂)); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } out是jsp页面表单元素，一个button，用于提交表单到相应Action进行Word下载。

Action设置jsp页面头文件。

这样每次点击button就可以把相应jsp页面的内容保存到Word中并且支持下载，Word中内容并且是可编辑状态。

如何在JSP页面实现Word文件的预览

你的目的是想用word来浏览jsp文件内容吗？似乎没这种必要吧。

如果真想这么做的话，你可以先通过记事本、editplus等文件编辑工具打开jsp文件，然后复制粘贴到word文档中。

或者，你是想用word作为网页编辑器来打开它？word可以作为网页编辑器，在打开htm/html静态网页时没问题。

但是对于jsp这种动态类型的网页，它应该是支持得不好，会存在打不开的情况，有的打开了也可能显示不完全。

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jsp 如何实现文件上传和下载功能？

上传： MyjspForm mf = (MyjspForm) form;// TODO Auto-generated method stub FormFile fname=mf.getFname(); byte [] fn = fname.getFileData(); OutputStream out = new FileOutputStream(＂D:\\＂+fname.getFileName()); Date date = new Date(); String title = fname.getFileName(); String url = ＂d:\\＂+fname.getFileName(); Upload ul = new Upload(); ul.setDate(date); ul.setTitle(title); ul.setUrl(url); UploadDAO uld = new UploadDAO(); uld.save(ul); out.write(fn); out.close（)； 下载： DownloadForm downloadForm = (DownloadForm)form; String fname = request.getParameter(＂furl＂); FileInputStream fi = new FileInputStream(fname); byte[] bt = new byte[fi.available()]; fi.read(bt)； //设置文件是下载还是打开以及打开的方式msdownload表示下载；设置字湖集，//主要是解决文件中的中文信息 response.setContentType(＂application/msdownload;charset=utf-8＂)； //文件下载后的默认保存名及打开方式 String contentDisposition = ＂attachment; filename=＂ + ＂java.txt＂; response.setHeader(＂Content-Disposition＂,contentDisposition)； //设置下载长度 response.setContentLength(bt.length); ServletOutputStream sos = response.getOutputStream(); sos.write(bt); return null;

在jsp中,用流上传文档为什么是空的？

需要写一个servlet来处理上传的文件，你可以修改保存路径或选择将图片保存在数据库中，只需要做简单的修改就行了，servlet代码如下：package com.ek.servlet; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.Iterator; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import com.ek.image.ImageUtil; publicclass FileUploadServlet extends HttpServlet { /** * */privatestaticfinallong serialVersionUID = 1L; privatestatic String filePath = ＂＂; /** * Destruction of the servlet. */publicvoid destroy() { super.destroy(); // Just puts ＂destroy＂ string in log// Put your code here } /** * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */publicvoid doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType(＂text/html; charset=utf-8＂); DiskFileItemFactory factory = new DiskFileItemFactory(); // maximum size that will be stored in memory factory.setSizeThreshold(4096); // the location for saving data that is larger than getSizeThreshold() factory.setRepository(new File(filePath)); ServletFileUpload upload = new ServletFileUpload(factory); // maximum size before a FileUploadException will be thrown upload.setSizeMax(1000000); try { List fileItems = upload.parseRequest(req); Iterator iter = fileItems.iterator(); // Get the file name String regExp = ＂.+\\\\(.+\\.?())$＂; Pattern fileNamePattern = Pattern.compile(regExp); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (!item.isFormField()) { String name = item.getName(); long size = item.getSize(); if ((name == null || name.equals(＂＂)) && size == 0) continue; Matcher m = fileNamePattern.matcher(name); boolean result = m.find(); if (result) { try { // String type =// m.group(1).substring(m.group(1).lastIndexOf('.')+1); InputStream stream = item.getInputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] b = newbyte[1000]; while (stream.read(b) > 0) { baos.write(b); } byte[] imageByte = baos.toByteArray(); String type = ImageUtil.getImageType(imageByte); if (type.equals(ImageUtil.TYPE_NOT_AVAILABLE)) thrownew Exception(＂file is not a image＂); BufferedImage myImage = ImageUtil .readImage(imageByte); // display the image ImageUtil.printImage(myImage, type, res .getOutputStream()); // save the image// if you want to save the file into database, do it here// when you want to display the image, use the method printImage in ImageUtil item.write(new File(filePath + ＂\\＂ + m.group(1))); stream.close(); baos.close(); } catch (Exception e) { e.printStackTrace(); } } else { throw new IOException(＂fail to upload＂); } } } } catch (IOException e) { e.printStackTrace(); } catch (FileUploadException e) { e.printStackTrace(); } } /** * Initialization of the servlet. * * @throws ServletException * if an error occure */ public void init() throws ServletException { // Change the file path here filePath = getServletContext().getRealPath(＂/＂); } } servlet中使用到一个ImageUtil类，其中封装了图片处理的实用方法，用于读写图片，代码如下：package com.ek.image; import java.awt.Component; import java.awt.Graphics2D; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Image; import java.awt.MediaTracker; import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.PixelGrabber; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Iterator; import javax.imageio.ImageIO; import javax.imageio.ImageReader; import javax.imageio.stream.MemoryCacheImageInputStream; import net.jmge.gif.Gif89Encoder; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.sun.imageio.plugins.bmp.BMPIma...

为什么我编的.js文件不能被jsp引用,如果把代码放在jsphe？

使用java中的io进行读取BufferedReader bufferedReader = null;File file = new File（＂文档地址+文档名.docx＂）;if(!file.exists()){System.out.println（＂文件不存在＂）；} else {bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(file)， ＂读取的字符格式（UTF-8或GBK）＂));String lineText = null;while((lineText = bufferedReader.readLine()) != null){if (linText != null && !lineText.eq(＂＂)){System.out.println（＂一次读取一行，一行内容为：＂ + lineText）;}}}

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