我想将文件(所有格式)上传到服务器并将文件位置存储在数据库(MySQL)中,我尝试使用长blob格式将文件(所有格式)存储在数据库中,但它不接受文件大小不超过1kb,仅接受文本文件。这是我的HTML代码
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <form enctype="multipart/form-data" action="upload.jsp" method="post"> <br/><br/><br/> <center> <table border="0" bgcolor=#ccFDDEE> <tr> <td colspan="2" align="center"><b>UPLOAD THE FILE</b></td> </tr> <tr> <td colspan="2" align="center"> </td> </tr> <tr> <td><b>Choose the file To Upload:</b></td> <td><INPUT NAME="file" TYPE="file"> </td> </tr> <tr> <td colspan="2" align="center"> </td> </tr> <tr> <td colspan="2" align="center"><input type="submit" value="Send File"> </td> </tr> <table> </center> </form> </body> </html>
这是我的jsp代码,用于将文件存储到数据库(使用long-blob)。
<%@ page import="java.io.*,java.sql.*" %> <% String saveFile=""; String contentType = request.getContentType(); if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) { DataInputStream in = new DataInputStream(request.getInputStream()); int formDataLength = request.getContentLength(); byte dataBytes[] = new byte[formDataLength]; int byteRead = 0; int totalBytesRead = 0; while (totalBytesRead < formDataLength) { byteRead = in.read(dataBytes, totalBytesRead,formDataLength); totalBytesRead += byteRead; } String file = new String(dataBytes); saveFile = file.substring(file.indexOf("filename=\"") + 10); saveFile = saveFile.substring(0, saveFile.indexOf("\n")); saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\"")); int lastIndex = contentType.lastIndexOf("="); String boundary = contentType.substring(lastIndex + 1,contentType.length()); int pos; pos = file.indexOf("filename=\""); pos = file.indexOf("\n", pos) + 1; pos = file.indexOf("\n", pos) + 1; pos = file.indexOf("\n", pos) + 1; int boundaryLocation = file.indexOf(boundary, pos) - 4; int startPos = ((file.substring(0, pos)).getBytes()).length; int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length; saveFile="/home/adapco/Desktop"+saveFile; File ff = new File(saveFile); FileOutputStream fileOut = new FileOutputStream(ff); fileOut.write(dataBytes, startPos, (endPos - startPos)); fileOut.flush(); fileOut.close(); %> <br> <table border="2"> <tr> <td><b>You have successfully upload the file by the name of:</b><% out.println(saveFile);%></td> </tr> </table> <% Connection connection = null; String connectionURL = "jdbc:mysql://localhost:3306/ksa"; ResultSet rs = null; PreparedStatement psmnt = null; FileInputStream fis; try { Class.forName("com.mysql.jdbc.Driver").newInstance(); connection = DriverManager.getConnection(connectionURL, "root", "root"); File f = new File(saveFile); psmnt = connection.prepareStatement("insert into file(file_data) values(?)"); fis = new FileInputStream(f); psmnt.setBinaryStream(1, (InputStream)fis, (int)(f.length())); int s = psmnt.executeUpdate(); if(s>0) { System.out.println("Uploaded successfully !"); } else{ System.out.println("unsucessfull to upload file."); } } catch(Exception e){ e.printStackTrace(); } } %>
现在我必须将文件存储到服务器并存储其到db的路径,或者使用长blob类型将文件(所有格式)存储在数据库中。使用netbeans和glassfish服务器(red hat linux)来iam。给我一些理念。
我强烈建议您使用人们为多部分文件上传处理而构建的现有模块之一。Commons Fileupload处于更流行的状态,我建议您对此进行研究(此处的使用示例)。
您的代码非常混乱,您正在以一定会导致错误的方式混合使用字节数组和字符串。这个:
int boundaryLocation = file.indexOf(boundary, pos) - 4; int startPos = ((file.substring(0, pos)).getBytes()).length; int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length; ... fileOut.write(dataBytes, startPos, (endPos - startPos));
特别毛。无论如何,如果您坚持要自己做,就应该清理代码,不要将字符串和字节数组一起使用(记住,字符串中的一个字符不一定只是一个字节)。不过,我不建议这样做,除非这是您的学习经历。在这种情况下,我将花一些时间尝试在Internet上查找一些示例代码以进行多部分表单处理。