org.htmlparser.sax

类 XMLReader

java.lang.Object

org.htmlparser.sax.XMLReader

所有已实现的接口:

org.xml.sax.XMLReader

public class XMLReader
extends java.lang.Object
implements org.xml.sax.XMLReader

SAX parser. Generates callbacks on the ContentHandler based on encountered nodes.
Preliminary.

 org.xml.sax.XMLReader reader = org.xml.sax.helpers.XMLReaderFactory.createXMLReader ("org.htmlparser.sax.XMLReader");
 org.xml.sax.ContentHandler content = new MyContentHandler ();
 reader.setContentHandler (content);
 org.xml.sax.ErrorHandler errors = new MyErrorHandler ();
 reader.setErrorHandler (errors);
 reader.parse ("http://cbc.ca");
 

构造器概要

构造器

构造器和说明
XMLReader() Create an SAX parser.

方法概要

限定符和类型	方法和说明
org.xml.sax.ContentHandler	getContentHandler() Return the current content handler.
org.xml.sax.DTDHandler	getDTDHandler() Return the current DTD handler.
org.xml.sax.EntityResolver	getEntityResolver() Return the current entity resolver.
org.xml.sax.ErrorHandler	getErrorHandler() Return the current error handler.
boolean	getFeature(java.lang.String name) Look up the value of a feature flag.
java.lang.Object	getProperty(java.lang.String name) Look up the value of a property.
void	parse(org.xml.sax.InputSource input) Parse an XML document.
void	parse(java.lang.String systemId) Parse an XML document from a system identifier (URI).
void	setContentHandler(org.xml.sax.ContentHandler handler) Allow an application to register a content event handler.
void	setDTDHandler(org.xml.sax.DTDHandler handler) Allow an application to register a DTD event handler.
void	setEntityResolver(org.xml.sax.EntityResolver resolver) Allow an application to register an entity resolver.
void	setErrorHandler(org.xml.sax.ErrorHandler handler) Allow an application to register an error event handler.
void	setFeature(java.lang.String name, boolean value) Set the value of a feature flag.
void	setProperty(java.lang.String name, java.lang.Object value) Set the value of a property.

从类继承的方法 java.lang.Object

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

构造器详细资料

XMLReader

public XMLReader()

Create an SAX parser.

方法详细资料

getFeature

public boolean getFeature(java.lang.String name)
                   throws org.xml.sax.SAXNotRecognizedException,
                          org.xml.sax.SAXNotSupportedException

Look up the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for an XMLReader to recognize a feature name but temporarily be unable to return its value. Some feature values may be available only in specific contexts, such as before, during, or after a parse. Also, some feature values may not be programmatically accessible. (In the case of an adapter for SAX1 Parser, there is no implementation-independent way to expose whether the underlying parser is performing validation, expanding external entities, and so forth.)

All XMLReaders are required to recognize the http://xml.org/sax/features/namespaces and the http://xml.org/sax/features/namespace-prefixes feature names.

Typical usage is something like this:

 XMLReader r = new MySAXDriver();

                         // try to activate validation
 try {
   r.setFeature("http://xml.org/sax/features/validation", true);
 } catch (SAXException e) {
   System.err.println("Cannot activate validation."); 
 }

                         // register event handlers
 r.setContentHandler(new MyContentHandler());
 r.setErrorHandler(new MyErrorHandler());

                         // parse the first document
 try {
   r.parse("http://www.foo.com/mydoc.xml");
 } catch (IOException e) {
   System.err.println("I/O exception reading XML document");
 } catch (SAXException e) {
   System.err.println("XML exception reading document.");
 }
 

Implementors are free (and encouraged) to invent their own features, using names built on their own URIs.

指定者:

getFeature 在接口中 org.xml.sax.XMLReader

参数:

name - The feature name, which is a fully-qualified URI.

返回:

The current value of the feature (true or false).

抛出:

org.xml.sax.SAXNotRecognizedException - If the feature value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the XMLReader recognizes the feature name but cannot determine its value at this time.

另请参阅:

setFeature(java.lang.String, boolean)

setFeature

public void setFeature(java.lang.String name,
                       boolean value)
                throws org.xml.sax.SAXNotRecognizedException,
                       org.xml.sax.SAXNotSupportedException

Set the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for an XMLReader to expose a feature value but to be unable to change the current value. Some feature values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.

All XMLReaders are required to support setting http://xml.org/sax/features/namespaces to true and http://xml.org/sax/features/namespace-prefixes to false.

指定者:

setFeature 在接口中 org.xml.sax.XMLReader

参数:

name - The feature name, which is a fully-qualified URI.

value - The requested value of the feature (true or false).

抛出:

org.xml.sax.SAXNotRecognizedException - If the feature value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the XMLReader recognizes the feature name but cannot set the requested value.

另请参阅:

getFeature(java.lang.String)

getProperty

public java.lang.Object getProperty(java.lang.String name)
                             throws org.xml.sax.SAXNotRecognizedException,
                                    org.xml.sax.SAXNotSupportedException

Look up the value of a property.

The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but temporarily be unable to return its value. Some property values may be available only in specific contexts, such as before, during, or after a parse.

XMLReaders are not required to recognize any specific property names, though an initial core set is documented for SAX2.

Implementors are free (and encouraged) to invent their own properties, using names built on their own URIs.

指定者:

getProperty 在接口中 org.xml.sax.XMLReader

参数:

name - The property name, which is a fully-qualified URI.

返回:

The current value of the property.

抛出:

org.xml.sax.SAXNotRecognizedException - If the property value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the XMLReader recognizes the property name but cannot determine its value at this time.

另请参阅:

setProperty(java.lang.String, java.lang.Object)

setProperty

public void setProperty(java.lang.String name,
                        java.lang.Object value)
                 throws org.xml.sax.SAXNotRecognizedException,
                        org.xml.sax.SAXNotSupportedException

Set the value of a property.

The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but to be unable to change the current value. Some property values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.

XMLReaders are not required to recognize setting any specific property names, though a core set is defined by SAX2.

This method is also the standard mechanism for setting extended handlers.

指定者:

setProperty 在接口中 org.xml.sax.XMLReader

参数:

name - The property name, which is a fully-qualified URI.

value - The requested value for the property.

抛出:

org.xml.sax.SAXNotRecognizedException - If the property value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the XMLReader recognizes the property name but cannot set the requested value.

setEntityResolver

public void setEntityResolver(org.xml.sax.EntityResolver resolver)

Allow an application to register an entity resolver.

If the application does not register an entity resolver, the XMLReader will perform its own default resolution.

Applications may register a new or different resolver in the middle of a parse, and the SAX parser must begin using the new resolver immediately.

指定者:

setEntityResolver 在接口中 org.xml.sax.XMLReader

参数:

resolver - The entity resolver.

另请参阅:

getEntityResolver()

getEntityResolver

public org.xml.sax.EntityResolver getEntityResolver()

Return the current entity resolver.

指定者:

getEntityResolver 在接口中 org.xml.sax.XMLReader

返回:

The current entity resolver, or null if none has been registered.

另请参阅:

setEntityResolver(org.xml.sax.EntityResolver)

setDTDHandler

public void setDTDHandler(org.xml.sax.DTDHandler handler)

Allow an application to register a DTD event handler.

If the application does not register a DTD handler, all DTD events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

指定者:

setDTDHandler 在接口中 org.xml.sax.XMLReader

参数:

handler - The DTD handler.

另请参阅:

getDTDHandler()

getDTDHandler

public org.xml.sax.DTDHandler getDTDHandler()

Return the current DTD handler.

指定者:

getDTDHandler 在接口中 org.xml.sax.XMLReader

返回:

The current DTD handler, or null if none has been registered.

另请参阅:

setDTDHandler(org.xml.sax.DTDHandler)

setContentHandler

public void setContentHandler(org.xml.sax.ContentHandler handler)

Allow an application to register a content event handler.

If the application does not register a content handler, all content events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

指定者:

setContentHandler 在接口中 org.xml.sax.XMLReader

参数:

handler - The content handler.

另请参阅:

getContentHandler()

getContentHandler

public org.xml.sax.ContentHandler getContentHandler()

Return the current content handler.

指定者:

getContentHandler 在接口中 org.xml.sax.XMLReader

返回:

The current content handler, or null if none has been registered.

另请参阅:

setContentHandler(org.xml.sax.ContentHandler)

setErrorHandler

public void setErrorHandler(org.xml.sax.ErrorHandler handler)

Allow an application to register an error event handler.

If the application does not register an error handler, all error events reported by the SAX parser will be silently ignored; however, normal processing may not continue. It is highly recommended that all SAX applications implement an error handler to avoid unexpected bugs.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

指定者:

setErrorHandler 在接口中 org.xml.sax.XMLReader

参数:

handler - The error handler.

另请参阅:

getErrorHandler()

getErrorHandler

public org.xml.sax.ErrorHandler getErrorHandler()

Return the current error handler.

指定者:

getErrorHandler 在接口中 org.xml.sax.XMLReader

返回:

The current error handler, or null if none has been registered.

另请参阅:

setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(org.xml.sax.InputSource input)
           throws java.io.IOException,
                  org.xml.sax.SAXException

Parse an XML document.

The application can use this method to instruct the XML reader to begin parsing an XML document from any valid input source (a character stream, a byte stream, or a URI).

Applications may not invoke this method while a parse is in progress (they should create a new XMLReader instead for each nested XML document). Once a parse is complete, an application may reuse the same XMLReader object, possibly with a different input source. Configuration of the XMLReader object (such as handler bindings and values established for feature flags and properties) is unchanged by completion of a parse, unless the definition of that aspect of the configuration explicitly specifies other behavior. (For example, feature flags or properties exposing characteristics of the document being parsed.)

During the parse, the XMLReader will provide information about the XML document through the registered event handlers.

This method is synchronous: it will not return until parsing has ended. If a client application wants to terminate parsing early, it should throw an exception.

指定者:

parse 在接口中 org.xml.sax.XMLReader

参数:

input - The input source for the top-level of the XML document.

抛出:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

java.io.IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

另请参阅:

InputSource, parse(java.lang.String), setEntityResolver(org.xml.sax.EntityResolver), setDTDHandler(org.xml.sax.DTDHandler), setContentHandler(org.xml.sax.ContentHandler), setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(java.lang.String systemId)
           throws java.io.IOException,
                  org.xml.sax.SAXException

Parse an XML document from a system identifier (URI).

This method is a shortcut for the common case of reading a document from a system identifier. It is the exact equivalent of the following:

 parse(new InputSource(systemId));
 

If the system identifier is a URL, it must be fully resolved by the application before it is passed to the parser.

指定者:

parse 在接口中 org.xml.sax.XMLReader

参数:

systemId - The system identifier (URI).

抛出:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

java.io.IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

另请参阅:

parse(org.xml.sax.InputSource)