如何使用java上传文件夹 [英] how to upload a folder using java
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问题描述
如何上传文件夹以便在项目webroot中创建文件夹 - > gallery->< folder name =>并且路径将存储在数据库中，例如gallery \< folder_name> ;.
我使用了以下代码，但它将从文件夹中获取单个图像进行上传。但我想一次上传总文件夹。怎么做？以下是我试过的代码。
how to upload a folder so that folder will be created in project webroot-> gallery-><folder name=""> and the path will be stored in database like gallery\<folder_name>.
i have used the follwing code but it will take single image from the folder for uploading. But i want upload total folder at a time. how to do? follwing is my code what i have tried.
<html:form action="/addmovie.do" method="post" enctype="multipart/form-data" >
<input type="file" name="file" id="label"/>
<html:submit value="Insert" styleId="submit"></html:submit> < br $>
Dao类：
Dao class:
public class AddMovieDao {
public static AddMovieFormBean insert(AddMovieFormBean bean) {
try {
PathReturn path = new PathReturn();
String realpath = path.getPath();
System.out.println("path is" + realpath);
FormFile file = bean.getFile();
String filePath = realpath + "allimages";
String dbpath = "D:\\allimages\\" + file.getFileName();
File folder = new File(filePath);
if (!folder.exists()) {
folder.mkdir();
}
String fileName = file.getFileName();
if (!("").equals(fileName)) {
System.out.println("Server path:" + filePath);
File newFile = new File(filePath, fileName);
if (!newFile.exists()) {
FileOutputStream fos = new FileOutputStream(newFile);
fos.write(file.getFileData());
fos.flush();
fos.close();
}
}
Connection con = (Connection) new
DB2Connection().getDatabaseConnection();
String sql = "insert into movies(movie_image) values(?) ";
PreparedStatement ps = con.prepareStatement(sql);
ps.setString(1, dbpath);
int ok = ps.executeUpdate();
}
} catch (SQLException e) {
e.printStackTrace();
} catch (NullPointerException nl) {
nl.printStackTrace();
}
catch (Exception ex) {
ex.printStackTrace();
}
return bean;
}
}
但上传单张图片。如何一次上传整个文件夹。请帮帮我。
先谢谢
but it uploads single image. how to upload entire folder at a time. please help me.
Thanks in Advance
推荐答案
ExtractFileSubDirectories.java
-------------------------------
ExtractFileSubDirectories.java
-------------------------------
public class ExtractFileSubDirectories {
public static void unzip(String strZipFile) {
try
{
System.out.println("In java Class:");
File fSourceZip = new File(strZipFile);
String zipPath = strZipFile.substring(0, strZipFile.length()-4);
File temp = new File(zipPath);
temp.mkdir();
System.out.println(zipPath + " created");
ZipFile zipFile = new ZipFile(fSourceZip);
Enumeration e = zipFile.entries();
while(e.hasMoreElements())
{
ZipEntry entry = (ZipEntry)e.nextElement();
File destinationFilePath = new File(zipPath,entry.getName());
destinationFilePath.getParentFile().mkdirs();
if(entry.isDirectory())
{
continue;
}
else
{
System.out.println("Extracting " + destinationFilePath);
BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(entry));
int b;
byte buffer[] = new byte[1024];
FileOutputStream fos = new FileOutputStream(destinationFilePath);
BufferedOutputStream bos = new BufferedOutputStream(fos,
1024);
while ((b = bis.read(buffer, 0, 1024)) != -1) {
bos.write(buffer, 0, b);
}
bos.flush();
bos.close();
fos.close();
bis.close();
}
}
zipFile.close();
System.out.println(fSourceZip.delete());
}
catch(IOException ioe)
{
ioe.printStackTrace();
//System.err.println("IOError :" + ioe.getMessage());
}
catch(Exception e){
e.printStackTrace();
}
}
}
jsp页面：
Fileupload.jsp
jsp page:
Fileupload.jsp
<![CDATA[<%
String OUTPUT_FOLDER = getServletContext().getRealPath("/Upload");
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 = OUTPUT_FOLDER +"\\"+ saveFile;
//System.out.println(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>You have successfully upload the file by the name of:
<%
out.println(saveFile);
com.winnova.struts.action.ExtractFileSubDirectories.unzip(saveFile);
}
else{
System.out.println("------------------"+contentType);
}
%>
</td>
</tr>
</table>
</br>
<HTML>
<HEAD>
<TITLE>Display file upload form to the user</TITLE>
</HEAD>
<BODY>
<FORM ENCTYPE="multipart/form-data" ACTION="fileUpload.jsp" METHOD=POST>
<br>
<br>
<br>
<table border="1" bgcolor="#ccFDDEE">
<tr>
<td colspan="2" align="center">UPLOAD THE FILE</td>
</tr>
<tr>
<td>File Name:</td>
<td><INPUT NAME="files" TYPE="text"></td>
</tr>
<tr>
<td>Choose the file To Upload:</td>
<td><INPUT NAME="file" TYPE="file"></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Send File"></td>
</tr>
</table>
</FORM>
</BODY>
</HTML>
</br></br></br>
使用的控件是文件的输入。这意味着这不适用于完整的文件夹。查看uploadify，这可能是解决您问题的好方法。
http://www.uploadify.com/ [ ^ ]
祝你好运！
The control used is an input for a file. meaning this will not be suitable for complete folders. Check out uploadify, that could be a nice solution to your problem.
http://www.uploadify.com/[^]
Good luck!
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