程序包 cn.taketoday.util

类 SystemPropertyUtils

java.lang.Object

cn.taketoday.util.SystemPropertyUtils

public abstract class SystemPropertyUtils
extends Object

Helper class for resolving placeholders in texts. Usually applied to file paths.

A text may contain ${...} placeholders, to be resolved as system properties: e.g. ${user.dir}. Default values can be supplied using the ":" separator between key and value.

从以下版本开始:

4.0

作者:

Juergen Hoeller, Rob Harrop, Dave Syer, TODAY 2021/9/28 22:39

另请参阅:

• PropertyPlaceholderHandler.PLACEHOLDER_PREFIX
• PropertyPlaceholderHandler.PLACEHOLDER_SUFFIX
• System.getProperty(String)

嵌套类概要

嵌套类

修饰符和类型	类	说明
private static final record	SystemPropertyUtils.SystemPropertyPlaceholderResolver	PlaceholderResolver implementation that resolves against system properties and system environment variables.

构造器概要

构造器

构造器	说明
SystemPropertyUtils()

方法概要

修饰符和类型	方法	说明
static String	resolvePlaceholders(String text)	Resolve ${...} placeholders in the given text, replacing them with corresponding system property values.
static String	resolvePlaceholders(String text, boolean ignoreUnresolvablePlaceholders)	Resolve ${...} placeholders in the given text, replacing them with corresponding system property values.

从类继承的方法 java.lang.Object

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

构造器详细资料

SystemPropertyUtils

public SystemPropertyUtils()

方法详细资料

resolvePlaceholders

public static String resolvePlaceholders(String text)

Resolve ${...} placeholders in the given text, replacing them with corresponding system property values.

参数:

text - the String to resolve

返回:

the resolved String

抛出:

IllegalArgumentException - if there is an unresolvable placeholder

另请参阅:

• PropertyPlaceholderHandler.PLACEHOLDER_PREFIX
• PropertyPlaceholderHandler.PLACEHOLDER_SUFFIX

resolvePlaceholders

public static String resolvePlaceholders(String text,
 boolean ignoreUnresolvablePlaceholders)

Resolve ${...} placeholders in the given text, replacing them with corresponding system property values. Unresolvable placeholders with no default value are ignored and passed through unchanged if the flag is set to true.

参数:

text - the String to resolve

ignoreUnresolvablePlaceholders - whether unresolved placeholders are to be ignored

返回:

the resolved String

抛出:

IllegalArgumentException - if there is an unresolvable placeholder

另请参阅:

• PropertyPlaceholderHandler.PLACEHOLDER_PREFIX
• and the "ignoreUnresolvablePlaceholders" flag is false