Package org.springframework.util
Class SystemPropertyUtils
- java.lang.Object
- org.springframework.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.- Since:
- 1.2.5
- Author:
- Juergen Hoeller, Rob Harrop, Dave Syer
- See Also:
PLACEHOLDER_PREFIX
,PLACEHOLDER_SUFFIX
,System.getProperty(String)
Field Summary
Fields Modifier and Type Field Description static String
PLACEHOLDER_PREFIX
Prefix for system property placeholders: "${"static String
PLACEHOLDER_SUFFIX
Suffix for system property placeholders: "}"static String
VALUE_SEPARATOR
Value separator for system property placeholders: ":"
Constructor Summary
Constructors Constructor Description SystemPropertyUtils()
Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static String
resolvePlaceholders(String text)
Resolve${...}
placeholders in the given text, replacing them with corresponding system property values.static String
resolvePlaceholders(String text, boolean ignoreUnresolvablePlaceholders)
Resolve${...}
placeholders in the given text, replacing them with corresponding system property values.
Field Detail
PLACEHOLDER_PREFIX
public static final String PLACEHOLDER_PREFIX
Prefix for system property placeholders: "${"- See Also:
- Constant Field Values
PLACEHOLDER_SUFFIX
public static final String PLACEHOLDER_SUFFIX
Suffix for system property placeholders: "}"- See Also:
- Constant Field Values
VALUE_SEPARATOR
public static final String VALUE_SEPARATOR
Value separator for system property placeholders: ":"- See Also:
- Constant Field Values
Constructor Detail
SystemPropertyUtils
public SystemPropertyUtils()
Method Detail
resolvePlaceholders
public static String resolvePlaceholders(String text)
Resolve${...}
placeholders in the given text, replacing them with corresponding system property values.- Parameters:
text
- the String to resolve- Returns:
- the resolved String
- Throws:
IllegalArgumentException
- if there is an unresolvable placeholder- See Also:
PLACEHOLDER_PREFIX
,PLACEHOLDER_SUFFIX
resolvePlaceholders
public static String resolvePlaceholders(String text, boolean ignoreUnresolvablePlaceholders)
Resolve${...}
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 totrue
.- Parameters:
text
- the String to resolveignoreUnresolvablePlaceholders
- whether unresolved placeholders are to be ignored- Returns:
- the resolved String
- Throws:
IllegalArgumentException
- if there is an unresolvable placeholder and the "ignoreUnresolvablePlaceholders" flag isfalse
- See Also:
PLACEHOLDER_PREFIX
,PLACEHOLDER_SUFFIX