org.htmlparser.beans

类 FilterBean

java.lang.Object

org.htmlparser.beans.FilterBean

所有已实现的接口:

java.io.Serializable

public class FilterBean
extends java.lang.Object
implements java.io.Serializable

Extract nodes from a URL using a filter.

 
     FilterBean fb = new FilterBean ("http://cbc.ca");
     fb.setFilters (new NodeFilter[] { new TagNameFilter ("META") });
     fb.setURL ("http://cbc.ca");
     System.out.println (fb.getNodes ().toHtml ());
 
 

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	PROP_CONNECTION_PROPERTY Property name in event where the connection changes.
static java.lang.String	PROP_NODES_PROPERTY Property name in event where the URL contents changes.
static java.lang.String	PROP_TEXT_PROPERTY Property name in event where the URL contents changes.
static java.lang.String	PROP_URL_PROPERTY Property name in event where the URL changes.

构造器概要

构造器

构造器和说明
FilterBean() Create a FilterBean object.

方法概要

限定符和类型	方法和说明
void	addPropertyChangeListener(java.beans.PropertyChangeListener listener) Add a PropertyChangeListener to the listener list.
java.net.URLConnection	getConnection() Get the current connection.
NodeFilter[]	getFilters() Get the current filter set.
NodeList	getNodes() Return the nodes of the URL matching the filter.
Parser	getParser() Get the parser used to fetch nodes.
boolean	getRecursive() Get the current recursion behaviour.
java.lang.String	getText() Convenience method to apply a StringBean to the filter results.
java.lang.String	getURL() Get the current URL.
static void	main(java.lang.String[] args) Unit test.
void	removePropertyChangeListener(java.beans.PropertyChangeListener listener) Remove a PropertyChangeListener from the listener list.
void	setConnection(java.net.URLConnection connection) Set the parser's connection.
void	setFilters(NodeFilter[] filters) Set the filters for the bean.
void	setParser(Parser parser) Set the parser for the bean.
void	setRecursive(boolean recursive) Set the recursion behaviour.
void	setURL(java.lang.String url) Set the URL to extract strings from.

从类继承的方法 java.lang.Object

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

字段详细资料

PROP_NODES_PROPERTY

public static final java.lang.String PROP_NODES_PROPERTY

Property name in event where the URL contents changes.

另请参阅:

常量字段值

PROP_TEXT_PROPERTY

public static final java.lang.String PROP_TEXT_PROPERTY

Property name in event where the URL contents changes.

另请参阅:

常量字段值

PROP_URL_PROPERTY

public static final java.lang.String PROP_URL_PROPERTY

Property name in event where the URL changes.

另请参阅:

常量字段值

PROP_CONNECTION_PROPERTY

public static final java.lang.String PROP_CONNECTION_PROPERTY

Property name in event where the connection changes.

另请参阅:

常量字段值

构造器详细资料

FilterBean

public FilterBean()

Create a FilterBean object.

方法详细资料

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

Add a PropertyChangeListener to the listener list. The listener is registered for all properties.

参数:

listener - The PropertyChangeListener to be added.

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

Remove a PropertyChangeListener from the listener list. This removes a registered PropertyChangeListener.

参数:

listener - The PropertyChangeListener to be removed.

getNodes

public NodeList getNodes()

Return the nodes of the URL matching the filter. This is the primary output of the bean.

返回:

The nodes from the URL matching the current filter.

getURL

public java.lang.String getURL()

Get the current URL.

返回:

The URL from which text has been extracted, or null if this property has not been set yet.

setURL

public void setURL(java.lang.String url)

Set the URL to extract strings from. The text from the URL will be fetched, which may be expensive, so this property should be set last.

参数:

url - The URL that text should be fetched from.

getConnection

public java.net.URLConnection getConnection()

Get the current connection.

返回:

The connection that the parser has or null if it hasn't been set or the parser hasn't been constructed yet.

setConnection

public void setConnection(java.net.URLConnection connection)

Set the parser's connection. The text from the URL will be fetched, which may be expensive, so this property should be set last.

参数:

connection - New value of property Connection.

getFilters

public NodeFilter[] getFilters()

Get the current filter set.

返回:

The current filters.

setFilters

public void setFilters(NodeFilter[] filters)

Set the filters for the bean. If the parser has been set, it is reset and the nodes are refetched with the new filters.

参数:

filters - The filter set to use.

getParser

public Parser getParser()

Get the parser used to fetch nodes.

返回:

The parser used by the bean.

setParser

public void setParser(Parser parser)

Set the parser for the bean. The parser is used immediately to fetch the nodes, which for a null filter means all the nodes

参数:

parser - The parser to use.

getText

public java.lang.String getText()

Convenience method to apply a StringBean to the filter results. This may yield duplicate or multiple text elements if the node list contains nodes from two or more levels in the same nested tag heirarchy, but if the node list contains only one tag, it provides access to the text within the node.

返回:

The textual contents of the nodes that pass through the filter set, as collected by the StringBean.

getRecursive

public boolean getRecursive()

Get the current recursion behaviour.

返回:

The recursion (applies to children, children's children, etc) behavior currently being used.

setRecursive

public void setRecursive(boolean recursive)

Set the recursion behaviour.

参数:

recursive - If true the extractAllNodesThatMatch() call is performed recursively.

main

public static void main(java.lang.String[] args)

Unit test.

参数:

args - Pass arg[0] as the URL to process, and optionally a node name for filtering.