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<%@ page contentType="text/html; charset=GBK" %> <%@ page import="java.io.*"%> <%@ page import="java.util.*"%> <%@ page import="javax.servlet.*"%> <%@ page import="javax.servlet.http.*"%> <html> <head> <title> upFile </title> </head> <body bgcolor="#ffffff"> <center> <% //定义上载文件的最大字节 int MAX_SIZE = 102400 * 102400; // 创建根路径的保存变量 String rootPath; //声明文件读入类 DataInputStream in = null; FileOutputStream fileOut = null; //取得客户端的网络地址 String remoteAddr = request.getRemoteAddr(); //out.print(remoteAddr); //获得服务器的名字 String serverName = request.getServerName(); //out.print(serverName); //取得jsp文件相对与根地址的地址 //out.print(request.getServletPath()); //取得互联网程序的绝对地址 String realPath = request.getRealPath(serverName); //out.println(realPath); realPath = realPath.substring(0,realPath.lastIndexOf("\")); //out.print(realPath); //创建文件的保存目录"upload" rootPath = realPath + "\upload\"; //out.println(rootPath); //取得客户端上传的数据类型 String contentType = request.getContentType(); //out.println("<p>客户端上传的数据类型 = " + contentType + "</p>"); try{ if(contentType.indexOf("multipart/form-data") >= 0){ //读入上传的数据 in = new DataInputStream(request.getInputStream()); int formDataLength = request.getContentLength(); if(formDataLength > MAX_SIZE){ out.println("<P>上传的文件字节数不可以超过" + MAX_SIZE + "</p>"); return; } //保存上传文件的数据 byte dataBytes[] = new byte[formDataLength]; int byteRead = 0; int totalBytesRead = 0; //上传的数据保存在byte数组 while(totalBytesRead < formDataLength){ byteRead = in.read(dataBytes,totalBytesRead,formDataLength); totalBytesRead += byteRead; } //根据byte数组创建字符串 String file = new String(dataBytes); //out.println(file); //取得上传的数据的文件名 String saveFile = file.substring(file.indexOf("filename="") + 10); saveFile = saveFile.substring(0,saveFile.indexOf(" ")); saveFile = saveFile.substring(saveFile.lastIndexOf("\") + 1,saveFile.indexOf(""")); int lastIndex = contentType.lastIndexOf("="); //取得数据的分隔字符串 String boundary = contentType.substring(lastIndex + 1,contentType.length()); //创建保存路径的文件名 String fileName = rootPath + saveFile; //out.print(fileName); int pos; pos = file.indexOf("filename=""); pos = file.indexOf(" ",pos) + 1; pos = file.indexOf(" ",pos) + 1; pos = file.indexOf(" ",pos) + 1; int boundaryLocation = file.indexOf(boundary,pos) - 4; //out.println(boundaryLocation); //取得文件数据的开始的位置 int startPos = ((file.substring(0,pos)).getBytes()).length; //out.println(startPos); //取得文件数据的结束的位置 int endPos = ((file.substring(0,boundaryLocation)).getBytes()).length; //out.println(endPos); //检查上载文件是否存在 File checkFile = new File(fileName); if(checkFile.exists()){ out.println("<p>" + saveFile + "文件已经存在.</p>"); } //检查上载文件的目录是否存在 File fileDir = new File(rootPath); if(!fileDir.exists()){ fileDir.mkdirs(); } //创建文件的写出类 fileOut = new FileOutputStream(fileName); //保存文件的数据 fileOut.write(dataBytes,startPos,(endPos - startPos)); fileOut.close(); out.println("<P>" + saveFile + "文件成功上载.</p>"); }else{ String content = request.getContentType(); out.println("<p>上传的数据类型不是是multipart/form-data</p>"); } }catch(Exception ex){ throw new ServletException(ex.getMessage()); } %> </center> </body> </html> |
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来自： ShangShujie > 《我的图书馆》
