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java.lang.Objectorg.apache.tomcat.util.http.fileupload.DefaultFileItem
public class DefaultFileItem
The default implementation of the
FileItem interface.
After retrieving an instance of this class from a DiskFileUpload instance (see
#parseRequest(javax.servlet.http.HttpServletRequest)), you may
either request all contents of file at once using get() or
request an InputStream with
getInputStream() and process the file without attempting to load
it into memory, which may come handy with large files.
| Method Summary | |
|---|---|
void |
delete()
Deletes the underlying storage for a file item, including deleting any associated temporary disk file. |
protected void |
finalize()
Removes the file contents from the temporary storage. |
byte[] |
get()
Returns the contents of the file as an array of bytes. |
java.lang.String |
getContentType()
Returns the content type passed by the browser or null if
not defined. |
java.lang.String |
getFieldName()
Returns the name of the field in the multipart form corresponding to this file item. |
java.io.InputStream |
getInputStream()
Returns an InputStream that can be
used to retrieve the contents of the file. |
java.lang.String |
getName()
Returns the original filename in the client's filesystem. |
java.io.OutputStream |
getOutputStream()
Returns an OutputStream that can
be used for storing the contents of the file. |
long |
getSize()
Returns the size of the file. |
java.io.File |
getStoreLocation()
Returns the File object for the FileItem's
data's temporary location on the disk. |
java.lang.String |
getString()
Returns the contents of the file as a String, using the default character encoding. |
java.lang.String |
getString(java.lang.String encoding)
Returns the contents of the file as a String, using the specified encoding. |
protected java.io.File |
getTempFile()
Creates and returns a File representing a uniquely
named temporary file in the configured repository path. |
boolean |
isFormField()
Determines whether or not a FileItem instance represents
a simple form field. |
boolean |
isInMemory()
Provides a hint as to whether or not the file contents will be read from memory. |
void |
setFieldName(java.lang.String fieldName)
Sets the field name used to reference this file item. |
void |
setFormField(boolean state)
Specifies whether or not a FileItem instance represents
a simple form field. |
void |
write(java.io.File file)
A convenience method to write an uploaded item to disk. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public java.io.InputStream getInputStream()
throws java.io.IOException
InputStream that can be
used to retrieve the contents of the file.
getInputStream in interface FileItemInputStream that can be
used to retrieve the contents of the file.
java.io.IOException - if an error occurs.public java.lang.String getContentType()
null if
not defined.
getContentType in interface FileItemnull if
not defined.public java.lang.String getName()
getName in interface FileItempublic boolean isInMemory()
isInMemory in interface FileItemtrue if the file contents will be read
from memory; false otherwise.public long getSize()
getSize in interface FileItempublic byte[] get()
get in interface FileItem
public java.lang.String getString(java.lang.String encoding)
throws java.io.UnsupportedEncodingException
get() to retrieve the
contents of the file.
getString in interface FileItemencoding - The character encoding to use.
java.io.UnsupportedEncodingException - if the requested character
encoding is not available.public java.lang.String getString()
get() to retrieve the
contents of the file.
getString in interface FileItem
public void write(java.io.File file)
throws java.lang.Exception
This implementation first attempts to rename the uploaded item to the specified destination file, if the item was originally written to disk. Otherwise, the data will be copied to the specified file.
This method is only guaranteed to work once, the first time it is invoked for a particular item. This is because, in the event that the method renames a temporary file, that file will no longer be available to copy or rename again at a later time.
write in interface FileItemfile - The File into which the uploaded item should
be stored.
java.lang.Exception - if an error occurs.public void delete()
FileItem instance is garbage
collected, this method can be used to ensure that this is done at an
earlier time, thus preserving system resources.
delete in interface FileItempublic java.lang.String getFieldName()
getFieldName in interface FileItemsetFieldName(java.lang.String)public void setFieldName(java.lang.String fieldName)
setFieldName in interface FileItemfieldName - The name of the form field.getFieldName()public boolean isFormField()
FileItem instance represents
a simple form field.
isFormField in interface FileItemtrue if the instance represents a simple form
field; false if it represents an uploaded file.setFormField(boolean)public void setFormField(boolean state)
FileItem instance represents
a simple form field.
setFormField in interface FileItemstate - true if the instance represents a simple form
field; false if it represents an uploaded file.isFormField()
public java.io.OutputStream getOutputStream()
throws java.io.IOException
OutputStream that can
be used for storing the contents of the file.
getOutputStream in interface FileItemOutputStream that can be used
for storing the contensts of the file.
java.io.IOException - if an error occurs.public java.io.File getStoreLocation()
File object for the FileItem's
data's temporary location on the disk. Note that for
FileItems that have their data stored in memory,
this method will return null. When handling large
files, you can use File.renameTo(java.io.File) to
move the file to new location without copying the data, if the
source and destination locations reside within the same logical
volume.
null if the data is stored in
memory.protected void finalize()
finalize in class java.lang.Objectprotected java.io.File getTempFile()
File representing a uniquely
named temporary file in the configured repository path.
File to be used for temporary storage.
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