org.apache.commons.io.filefilter

类 PrefixFileFilter

java.lang.Object

org.apache.commons.io.filefilter.AbstractFileFilter

org.apache.commons.io.filefilter.PrefixFileFilter

所有已实现的接口:

FileFilter, FilenameFilter, Serializable, IOFileFilter

public class PrefixFileFilter
extends AbstractFileFilter
implements Serializable

Filters filenames for a certain prefix.

For example, to print all files and directories in the current directory whose name starts with Test:

 File dir = new File(".");
 String[] files = dir.list( new PrefixFileFilter("Test") );
 for ( int i = 0; i < files.length; i++ ) {
     System.out.println(files[i]);
 }
 

从以下版本开始:

1.0

另请参阅:

FileFilterUtils.prefixFileFilter(String), FileFilterUtils.prefixFileFilter(String, IOCase), 序列化表格

构造器概要

构造器

构造器和说明
PrefixFileFilter(List<String> prefixes) Constructs a new Prefix file filter for a list of prefixes.
PrefixFileFilter(List<String> prefixes, IOCase caseSensitivity) Constructs a new Prefix file filter for a list of prefixes specifying case-sensitivity.
PrefixFileFilter(String prefix) Constructs a new Prefix file filter for a single prefix.
PrefixFileFilter(String[] prefixes) Constructs a new Prefix file filter for any of an array of prefixes.
PrefixFileFilter(String[] prefixes, IOCase caseSensitivity) Constructs a new Prefix file filter for any of an array of prefixes specifying case-sensitivity.
PrefixFileFilter(String prefix, IOCase caseSensitivity) Constructs a new Prefix file filter for a single prefix specifying case-sensitivity.

方法概要

限定符和类型	方法和说明
boolean	accept(File file) Checks to see if the filename starts with the prefix.
boolean	accept(File file, String name) Checks to see if the filename starts with the prefix.
String	toString() Provide a String representaion of this file filter.

从类继承的方法 java.lang.Object

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

构造器详细资料

PrefixFileFilter

public PrefixFileFilter(String prefix)

Constructs a new Prefix file filter for a single prefix.

参数:

prefix - the prefix to allow, must not be null

抛出:

IllegalArgumentException - if the prefix is null

PrefixFileFilter

public PrefixFileFilter(String prefix,
                        IOCase caseSensitivity)

Constructs a new Prefix file filter for a single prefix specifying case-sensitivity.

参数:

prefix - the prefix to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

抛出:

IllegalArgumentException - if the prefix is null

从以下版本开始:

1.4

PrefixFileFilter

public PrefixFileFilter(String[] prefixes)

Constructs a new Prefix file filter for any of an array of prefixes.

The array is not cloned, so could be changed after constructing the instance. This would be inadvisable however.

参数:

prefixes - the prefixes to allow, must not be null

抛出:

IllegalArgumentException - if the prefix array is null

PrefixFileFilter

public PrefixFileFilter(String[] prefixes,
                        IOCase caseSensitivity)

Constructs a new Prefix file filter for any of an array of prefixes specifying case-sensitivity.

参数:

prefixes - the prefixes to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

抛出:

IllegalArgumentException - if the prefix is null

从以下版本开始:

1.4

PrefixFileFilter

public PrefixFileFilter(List<String> prefixes)

Constructs a new Prefix file filter for a list of prefixes.

参数:

prefixes - the prefixes to allow, must not be null

抛出:

IllegalArgumentException - if the prefix list is null

ClassCastException - if the list does not contain Strings

PrefixFileFilter

public PrefixFileFilter(List<String> prefixes,
                        IOCase caseSensitivity)

Constructs a new Prefix file filter for a list of prefixes specifying case-sensitivity.

参数:

prefixes - the prefixes to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

抛出:

IllegalArgumentException - if the prefix list is null

ClassCastException - if the list does not contain Strings

从以下版本开始:

1.4

方法详细资料

accept

public boolean accept(File file)

Checks to see if the filename starts with the prefix.

指定者:

accept 在接口中 FileFilter

指定者:

accept 在接口中 IOFileFilter

覆盖:

accept 在类中 AbstractFileFilter

参数:

file - the File to check

返回:

true if the filename starts with one of our prefixes

accept

public boolean accept(File file,
                      String name)

Checks to see if the filename starts with the prefix.

指定者:

accept 在接口中 FilenameFilter

指定者:

accept 在接口中 IOFileFilter

覆盖:

accept 在类中 AbstractFileFilter

参数:

file - the File directory

name - the filename

返回:

true if the filename starts with one of our prefixes

toString

public String toString()

Provide a String representaion of this file filter.

覆盖:

toString 在类中 AbstractFileFilter

返回:

a String representaion