程序包 cn.taketoday.util

类 PropertyPlaceholderHandler

java.lang.Object

cn.taketoday.util.PropertyPlaceholderHandler

public class PropertyPlaceholderHandler
extends Object

Utility class for working with Strings that have placeholder values in them. A placeholder takes the form ${name}. Using PropertyPlaceholderHandler these placeholders can be substituted for user-supplied values.

Values for substitution can be supplied using a Properties instance or using a PlaceholderResolver.

从以下版本开始:

4.0

作者:

Juergen Hoeller, Rob Harrop, TODAY 2021/9/28 22:26

字段概要

字段

修饰符和类型	字段	说明
private final boolean	ignoreUnresolvablePlaceholders
private static final Logger	log
static final PropertyPlaceholderHandler	nonStrict
static final String	PLACEHOLDER_PREFIX	Prefix for property placeholders: "${".
static final String	PLACEHOLDER_SUFFIX	Suffix for property placeholders: "}".
private final String	placeholderPrefix
private final int	placeholderPrefixLength
private final String	placeholderSuffix
private final int	placeholderSuffixLength
private final String	simplePrefix
static final PropertyPlaceholderHandler	strict
static final String	VALUE_SEPARATOR	Value separator for property placeholders: ":".
private final String	valueSeparator
private static final HashMap<String,String>	wellKnownSimplePrefixes

构造器概要

构造器

构造器	说明
PropertyPlaceholderHandler(String placeholderPrefix, String placeholderSuffix)	Creates a new PropertyPlaceholderHandler that uses the supplied prefix and suffix.
PropertyPlaceholderHandler(String placeholderPrefix, String placeholderSuffix, String valueSeparator, boolean ignoreUnresolvablePlaceholders)	Creates a new PropertyPlaceholderHandler that uses the supplied prefix and suffix.

方法概要

修饰符和类型	方法	说明
private int	findPlaceholderEndIndex(CharSequence buf, int startIndex)
protected String	parseStringValue(String value, PlaceholderResolver placeholderResolver, Set<String> visitedPlaceholders)
String	replacePlaceholders(String value, PlaceholderResolver placeholderResolver)	Replaces all placeholders of format ${name} with the value returned from the supplied PlaceholderResolver.
String	replacePlaceholders(String value, Properties properties)	Replaces all placeholders of format ${name} with the corresponding property from the supplied Properties.
static PropertyPlaceholderHandler	shared(boolean ignoreUnresolvablePlaceholders)

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

log

private static final Logger log

PLACEHOLDER_SUFFIX

public static final String PLACEHOLDER_SUFFIX

Suffix for property placeholders: "}".

另请参阅:

• 常量字段值

PLACEHOLDER_PREFIX

public static final String PLACEHOLDER_PREFIX

Prefix for property placeholders: "${".

另请参阅:

• 常量字段值

VALUE_SEPARATOR

public static final String VALUE_SEPARATOR

Value separator for property placeholders: ":".

另请参阅:

• 常量字段值

wellKnownSimplePrefixes

private static final HashMap<String,String> wellKnownSimplePrefixes

strict

public static final PropertyPlaceholderHandler strict

nonStrict

public static final PropertyPlaceholderHandler nonStrict

simplePrefix

private final String simplePrefix

placeholderPrefix

private final String placeholderPrefix

placeholderSuffix

private final String placeholderSuffix

placeholderPrefixLength

private final int placeholderPrefixLength

placeholderSuffixLength

private final int placeholderSuffixLength

valueSeparator

@Nullable
private final String valueSeparator

ignoreUnresolvablePlaceholders

private final boolean ignoreUnresolvablePlaceholders

构造器详细资料

PropertyPlaceholderHandler

public PropertyPlaceholderHandler(String placeholderPrefix,
 String placeholderSuffix)

Creates a new PropertyPlaceholderHandler that uses the supplied prefix and suffix. Unresolvable placeholders are ignored.

参数:

placeholderPrefix - the prefix that denotes the start of a placeholder

placeholderSuffix - the suffix that denotes the end of a placeholder

PropertyPlaceholderHandler

public PropertyPlaceholderHandler(String placeholderPrefix,
 String placeholderSuffix,
 @Nullable
 String valueSeparator,
 boolean ignoreUnresolvablePlaceholders)

Creates a new PropertyPlaceholderHandler that uses the supplied prefix and suffix.

参数:

placeholderPrefix - the prefix that denotes the start of a placeholder

placeholderSuffix - the suffix that denotes the end of a placeholder

valueSeparator - the separating character between the placeholder variable and the associated default value, if any

ignoreUnresolvablePlaceholders - indicates whether unresolvable placeholders should be ignored (true) or cause an exception (false)

方法详细资料

replacePlaceholders

public String replacePlaceholders(String value,
 Properties properties)

Replaces all placeholders of format ${name} with the corresponding property from the supplied Properties.

参数:

value - the value containing the placeholders to be replaced

properties - the Properties to use for replacement

返回:

the supplied value with placeholders replaced inline

replacePlaceholders

public String replacePlaceholders(String value,
 PlaceholderResolver placeholderResolver)

Replaces all placeholders of format ${name} with the value returned from the supplied PlaceholderResolver.

参数:

value - the value containing the placeholders to be replaced

placeholderResolver - the PlaceholderResolver to use for replacement

返回:

the supplied value with placeholders replaced inline

parseStringValue

protected String parseStringValue(String value,
 PlaceholderResolver placeholderResolver,
 @Nullable
 Set<String> visitedPlaceholders)

findPlaceholderEndIndex

private int findPlaceholderEndIndex(CharSequence buf,
 int startIndex)

shared

@NonNull
public static PropertyPlaceholderHandler shared(boolean ignoreUnresolvablePlaceholders)