com.fastchar.multipart

类 MultipartParser

java.lang.Object

com.fastchar.multipart.MultipartParser

public class MultipartParser
extends Object

from com.oreilly.servlet.multipart;

字段概要

字段

限定符和类型	字段和说明
private String	boundary MIME boundary that delimits parts
private byte[]	buf buffer for readLine method
private static String	DEFAULT_ENCODING default encoding
private String	encoding preferred encoding
private javax.servlet.ServletInputStream	in input stream to read parts from
private FilePart	lastFilePart reference to the last file part we returned

构造器概要

构造器

构造器和说明
MultipartParser(javax.servlet.http.HttpServletRequest req, int maxSize) Creates a MultipartParser from the specified request, which limits the upload size to the specified length, buffers for performance and prevent attempts to read past the amount specified by the Content-Length.
MultipartParser(javax.servlet.http.HttpServletRequest req, int maxSize, boolean buffer, boolean limitLength) Creates a MultipartParser from the specified request, which limits the upload size to the specified length, and optionally buffers for performance and prevents attempts to read past the amount specified by the Content-Length.
MultipartParser(javax.servlet.http.HttpServletRequest req, int maxSize, boolean buffer, boolean limitLength, String encoding) Creates a MultipartParser from the specified request, which limits the upload size to the specified length, and optionally buffers for performance and prevents attempts to read past the amount specified by the Content-Length, and with a specified encoding.

方法概要

限定符和类型	方法和说明
private String	extractBoundary(String line) Extracts and returns the boundary token from a line.
private static String	extractContentType(String line) Extracts and returns the content type from a line, or null if the line was empty.
private String[]	extractDispositionInfo(String line) Extracts and returns disposition info from a line, as a String array with elements: disposition, name, filename.
private String	readLine() Read the next line of input.
Part	readNextPart() Read the next part arriving in the stream.
void	setEncoding(String encoding) Sets the encoding used to parse from here onward.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

in

private javax.servlet.ServletInputStream in

input stream to read parts from

boundary

private String boundary

MIME boundary that delimits parts

lastFilePart

private FilePart lastFilePart

reference to the last file part we returned

buf

private byte[] buf

buffer for readLine method

DEFAULT_ENCODING

private static String DEFAULT_ENCODING

default encoding

encoding

private String encoding

preferred encoding

构造器详细资料

MultipartParser

public MultipartParser(javax.servlet.http.HttpServletRequest req,
                       int maxSize)
                throws IOException

Creates a MultipartParser from the specified request, which limits the upload size to the specified length, buffers for performance and prevent attempts to read past the amount specified by the Content-Length.

参数:

req - the servlet request.

maxSize - the maximum size of the POST content.

抛出:

IOException

MultipartParser

public MultipartParser(javax.servlet.http.HttpServletRequest req,
                       int maxSize,
                       boolean buffer,
                       boolean limitLength)
                throws IOException

Creates a MultipartParser from the specified request, which limits the upload size to the specified length, and optionally buffers for performance and prevents attempts to read past the amount specified by the Content-Length.

参数:

req - the servlet request.

maxSize - the maximum size of the POST content.

buffer - whether to do internal buffering or let the server buffer, useful for servers that don't buffer

limitLength - boolean flag to indicate if we need to filter the request's input stream to prevent trying to read past the end of the stream.

抛出:

IOException

MultipartParser

public MultipartParser(javax.servlet.http.HttpServletRequest req,
                       int maxSize,
                       boolean buffer,
                       boolean limitLength,
                       String encoding)
                throws IOException

Creates a MultipartParser from the specified request, which limits the upload size to the specified length, and optionally buffers for performance and prevents attempts to read past the amount specified by the Content-Length, and with a specified encoding.

参数:

req - the servlet request.

maxSize - the maximum size of the POST content.

buffer - whether to do internal buffering or let the server buffer, useful for servers that don't buffer

limitLength - boolean flag to indicate if we need to filter the request's input stream to prevent trying to read past the end of the stream.

encoding - the encoding to use for parsing, default is ISO-8859-1.

抛出:

IOException

方法详细资料

setEncoding

public void setEncoding(String encoding)

Sets the encoding used to parse from here onward. The default is ISO-8859-1. Encodings are actually best passed into the contructor, so even the initial line reads are correct.

参数:

encoding - The encoding to use for parsing

readNextPart

public Part readNextPart()
                  throws IOException

Read the next part arriving in the stream. Will be either a FilePart or a ParamPart, or null to indicate there are no more parts to read. The order of arrival corresponds to the order of the form elements in the submitted form.

返回:

either a FilePart, a ParamPart or null if there are no more parts to read.

抛出:

IOException - if an input or output exception has occurred.

另请参阅:

FilePart, ParamPart

extractBoundary

private String extractBoundary(String line)

Extracts and returns the boundary token from a line.

返回:

the boundary token.

extractDispositionInfo

private String[] extractDispositionInfo(String line)
                                 throws IOException

Extracts and returns disposition info from a line, as a String array with elements: disposition, name, filename.

返回:

String[] of elements: disposition, name, filename.

抛出:

IOException - if the line is malformatted.

extractContentType

private static String extractContentType(String line)
                                  throws IOException

Extracts and returns the content type from a line, or null if the line was empty.

返回:

content type, or null if line was empty.

抛出:

IOException - if the line is malformatted.

readLine

private String readLine()
                 throws IOException

Read the next line of input.

返回:

a String containing the next line of input from the stream, or null to indicate the end of the stream.

抛出:

IOException - if an input or output exception has occurred.