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public interface Part
This class represents a part or form item that was received within a
multipart/form-data
POST request.- Since:
- Servlet 3.0
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description void
delete()
Deletes the underlying storage for a file item, including deleting any associated temporary disk file.String
getContentType()
Gets the content type of this part.String
getHeader(String name)
Returns the value of the specified mime header as aString
.Collection<String>
getHeaderNames()
Gets the header names of this Part.Collection<String>
getHeaders(String name)
Gets the values of the Part header with the given name.InputStream
getInputStream()
Gets the content of this part as an InputStreamString
getName()
Gets the name of this partlong
getSize()
Returns the size of this fille.String
getSubmittedFileName()
Gets the file name specified by the clientvoid
write(String fileName)
A convenience method to write this uploaded item to disk.
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Method Detail
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getInputStream
InputStream getInputStream() throws IOException
Gets the content of this part as an InputStream- Returns:
- The content of this part as an InputStream
- Throws:
IOException
- If an error occurs in retrieving the contet as an InputStream
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getContentType
String getContentType()
Gets the content type of this part.- Returns:
- The content type of this part.
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getName
String getName()
Gets the name of this part- Returns:
- The name of this part as a String
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getSubmittedFileName
String getSubmittedFileName()
Gets the file name specified by the client- Returns:
- the submitted file name
- Since:
- Servlet 3.1
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getSize
long getSize()
Returns the size of this fille.- Returns:
- a
long
specifying the size of this part, in bytes.
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write
void write(String fileName) throws IOException
A convenience method to write this uploaded item to disk.This method is not guaranteed to succeed if called more than once for the same part. This allows a particular implementation to use, for example, file renaming, where possible, rather than copying all of the underlying data, thus gaining a significant performance benefit.
- Parameters:
fileName
- the name of the file to which the stream will be written. The file is created relative to the location as specified in the MultipartConfig- Throws:
IOException
- if an error occurs.
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delete
void delete() throws IOException
Deletes the underlying storage for a file item, including deleting any associated temporary disk file.- Throws:
IOException
- if an error occurs.
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getHeader
String getHeader(String name)
Returns the value of the specified mime header as aString
. If the Part did not include a header of the specified name, this method returnsnull
. If there are multiple headers with the same name, this method returns the first header in the part. The header name is case insensitive. You can use this method with any request header.- Parameters:
name
- aString
specifying the header name- Returns:
- a
String
containing the value of the requested header, ornull
if the part does not have a header of that name
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getHeaders
Collection<String> getHeaders(String name)
Gets the values of the Part header with the given name.Any changes to the returned
Collection
must not affect thisPart
.Part header names are case insensitive.
- Parameters:
name
- the header name whose values to return- Returns:
- a (possibly empty)
Collection
of the values of the header with the given name
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getHeaderNames
Collection<String> getHeaderNames()
Gets the header names of this Part.Some servlet containers do not allow servlets to access headers using this method, in which case this method returns
null
Any changes to the returned
Collection
must not affect thisPart
.- Returns:
- a (possibly empty)
Collection
of the header names of this Part
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Document created the 11/06/2005, last modified the 18/08/2025
Source of the printed document:https://www.gaudry.be/en/java-api-javaee-rf-javax/servlet/http/part.html
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