javax.mail.internet
类 HeaderTokenizer

java.lang.Object
  javax.mail.internet.HeaderTokenizer

public class HeaderTokenizer
extends Object

This class tokenizes RFC822 and MIME headers into the basic symbols specified by RFC822 and MIME.

This class handles folded headers (ie headers with embedded CRLF SPACE sequences). The folds are removed in the returned tokens.

版本：

1.11, 07/05/04

作者：

John Mani

嵌套类摘要

static class

HeaderTokenizer.Token The Token class represents tokens returned by the HeaderTokenizer.

字段摘要

static String	MIME MIME specials
static String	RFC822 RFC822 specials

构造方法摘要

HeaderTokenizer(String header)
Constructor.

HeaderTokenizer(String header, String delimiters)
Constructor.

HeaderTokenizer(String header, String delimiters, boolean skipComments)
Constructor that takes a rfc822 style header.

方法摘要

String	getRemainder() Return the rest of the Header.
HeaderTokenizer.Token	next() Parses the next token from this String.
HeaderTokenizer.Token	peek() Peek at the next token, without actually removing the token from the parse stream.

从类 java.lang.Object 继承的方法

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

字段详细信息

RFC822

public static final String RFC822

RFC822 specials

另请参见：

常量字段值

MIME

public static final String MIME

MIME specials

另请参见：

常量字段值

构造方法详细信息

HeaderTokenizer

public HeaderTokenizer(String header,
                       String delimiters,
                       boolean skipComments)

Constructor that takes a rfc822 style header.

参数：

header - The rfc822 header to be tokenized

delimiters - Set of delimiter characters to be used to delimit ATOMS. These are usually RFC822 or MIME

skipComments - If true, comments are skipped and not returned as tokens

HeaderTokenizer

public HeaderTokenizer(String header,
                       String delimiters)

Constructor. Comments are ignored and not returned as tokens

参数：

header - The header that is tokenized

delimiters - The delimiters to be used

HeaderTokenizer

public HeaderTokenizer(String header)

Constructor. The RFC822 defined delimiters - RFC822 - are used to delimit ATOMS. Also comments are skipped and not returned as tokens

方法详细信息

next

public HeaderTokenizer.Token next()
                           throws ParseException

Parses the next token from this String.

Clients sit in a loop calling next() to parse successive tokens until an EOF Token is returned.

返回：

the next Token

抛出：

ParseException - if the parse fails

peek

public HeaderTokenizer.Token peek()
                           throws ParseException

Peek at the next token, without actually removing the token from the parse stream. Invoking this method multiple times will return successive tokens, until next() is called.

返回：

the next Token

抛出：

ParseException - if the parse fails

getRemainder

public String getRemainder()

Return the rest of the Header.

返回：

String rest of header. null is returned if we are already at end of header