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刚好工作中有用到，特此来记录一下，JAVA服务器用的是JFinal框架。
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Unity上传文件只能传输字节流，然后服务器这边再将字节流写入文件
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public void uploadFile() throws IOException { renderNull(); //==================开始处理文件=================== //接收上传文件内容中临时文件的文件名 System.out.println(getRequest().getContentLength()); if(getRequest().getContentLength()>0){ String tempFileName = new String("tempFileName.txt"); //tempfile 对象指向临时文件 File tempFile = new File(PathKit.getWebRootPath() + File.separator+tempFileName); System.out.println("FilePath:"+PathKit.getWebRootPath() + File.separator+tempFileName); //outputfile 文件输出流指向这个临时文件 FileOutputStream outputStream = new FileOutputStream(tempFile); //得到客户端提交的所有数据 InputStream fileSourcel = getRequest().getInputStream(); //将得到的客户端数据写入临时文件 byte b[] = new byte[1000]; int n ; while ((n=fileSourcel.read(b))!=-1){ System.out.println("b:"+b); System.out.println("n:"+n); outputStream.write(b,0,n); } //关闭输出流和输入流 outputStream.close(); fileSourcel.close(); //randomFile对象指向临时文件 RandomAccessFile randomFile = new RandomAccessFile(tempFile,"r"); //读取临时文件的前三行数据 randomFile.readLine(); randomFile.readLine(); randomFile.readLine(); //读取临时文件的第四行数据，这行数据中包含了文件的路径和文件名 String filePath = randomFile.readLine(); //得到文件名 System.out.println(filePath); int position = filePath.lastIndexOf("filename"); String filename =Tool.codeString(filePath.substring(position+10,filePath.length()-1)); System.out.println("filename"+filename); //重新定位读取文件指针到文件头 randomFile.seek(0); //得到第五行回车符的位置，这是上传文件数据的开始位置 long fifthEnterPosition = 0; int fifth = 1; while((n=randomFile.readByte())!=-1&& fifth<=5)){ System.out.println("n:"+n); System.out.println( fifth:" fifth); if(n==\'\n\'){ fifthEnterPosition = randomFile.getFilePointer(); fifth++; } System.out.println( fifthEnterPosition:" fifthEnterPosition); } //生成上传文件的目录 File fileupLoad = new File(PathKit.getWebRootPath() + File.separator,"upLoad"); fileupLoad.mkdir(); //saveFile 对象指向要保存的文件 File saveFile = new File(PathKit.getWebRootPath() +"\\upLoad",filename); RandomAccessFile randomAccessFile = new RandomAccessFile(saveFile,"rw"); //找到上传文件数据的结束位置，即倒数第三行 randomFile.seek(randomFile.length()); long endPosition = randomFile.getFilePointer(); System.out.println("endPosition:"+endPosition); int j = 1; while((endPosition>=0)&&(j<=3)){ System.out.println("endPosition1:"+endPosition); System.out.println("j:"+j); endPosition--; randomFile.seek(endPosition); if(randomFile.readByte()==\'\n\'){ j++; } } //从上传文件数据的开始位置到结束位置，把数据写入到要保存的文件中 System.out.println( fifthEnterPosition:" fifthEnterPosition); randomFile.seek fifthEnterPosition); long startPoint = randomFile.getFilePointer(); System.out.println("startPoint:"+startPoint); //endPosition=randomFile.getFilePointer(); System.out.println("endPosition:"+endPosition); while(startPoint<endPosition){ System.out.println("startPoint1:"+startPoint); //System.out.println("randomFile.readByte():"+randomFile.readByte()); randomAccessFile.write(randomFile.readByte()); startPoint = randomFile.getFilePointer(); } //关闭文件输入、输出 randomAccessFile.close(); randomFile.close(); tempFile.delete(); //==================处理文件结束=================== //向控制台输出文件上传成功 System.out.println("File upload success!"); checkCsv(); }else{ renderText("false"); } }
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public class Tool { /** 文件字节流 */ public static byte[] getBytes(String filePath) { byte[] buffer = null; try { File file = new File(filePath); FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream(1000); byte[] b = new byte[1000]; int n; while ((n = fis.read(b)) != -1) { bos.write(b, 0, n); } fis.close(); bos.close(); buffer = bos.toByteArray(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return buffer; } /** 处理中文字符串的函数 */ public static String codeString(String str) { String s = str; try { byte[] temp = s.getBytes("UTF-8"); s = new String(temp); return s; } catch (UnsupportedEncodingException e) { e.printStackTrace(); return s; } }
} - 用网页上传与字节流传输完全不一样
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public void uploadFileWeb() throws IOException { UploadFile uploadFile = this.getFile(); String fileName = uploadFile.getOriginalFileName(); File file = uploadFile.getFile(); FileService fs = new FileService(); File t = new File("D:\\file\\" + fileName); try { t.createNewFile(); } catch (IOException e) { e.printStackTrace(); } fs.fileChannelCopy(file, t); file.delete(); }
- 下载文件用的是JFinal的renderFile
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// 下载文件 public void downfile() throws FileNotFoundException, IOException { readfiles("D:\\file\\"); String name = getPara("filename"); System.out.println(name); int index = -1; for (int i = 0; i < filearraylist.size(); i++) { if (filearraylist.get(i).indexOf(name) != -1) { index = i; } } System.out.println(index); if (index > -1) { renderFile(new File(filearraylist.get(index))); System.out.println(filearraylist.get(index)); } } // 递归获取目录下的所有文件 public static boolean readfiles(String filepath) throws FileNotFoundException, IOException { try { File file = new File(filepath); if (!file.isDirectory()) { System.out.println("文件"); System.out.println("path=" + file.getPath()); System.out.println("absolutepath=" + file.getAbsolutePath()); System.out.println("name=" + file.getName()); filearraylist.add(file.getPath()); // filearraylist.add("<a href=\'/file/downfile\'>下载</a><br>"); } else if (file.isDirectory()) { System.out.println("文件夹"); String[] filelist = file.list(); for (int i = 0; i < filelist.length; i++) { File readfile = new File(filepath + "\\" + filelist[i]); if (!readfile.isDirectory()) { System.out.println("path=" + readfile.getPath()); System.out.println("absolutepath=" + readfile.getAbsolutePath()); System.out.println("name=" + readfile.getName()); filearraylist.add(readfile.getPath()); } else if (readfile.isDirectory()) { readfiles(filepath + "\\" + filelist[i]); } } } } catch (FileNotFoundException e) { System.out.println("readfile() Exception:" + e.getMessage()); } return true; }
引用自http://blog.csdn.net/aries_h/article/details/50971981
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