Apache Ant Jar

JAR is a group of Java classes and known as Java Archive file. In Ant, we can create Jar files by using <jar> element in build.xml file.

It is a task and implicitly use FileSet and supports it?s attributes. It also allows to various nested elements like <include>, <exclude>, <patternset> etc and contains attributes which are given below.

Apache Ant Jar Attributes

Attribute	Description	Required
destfile	The JAR file to create.	Yes
basedir	The directory from which to jar the files.	No
compress	Store and compress data.	No
filesonly	It is used to store only file entries.	No
includes	A list of patterns of files that must be included while creating Jar.	No
excludes	A list of patterns of files that must be excluded while creating Jar.	No
update	Indicates whether to update Jar or not.	No
duplicate	behavior when a duplicate file is found. Valid values are add, preserve, and fail.	No
level	Non-default level at which file compression should be performed.	No
useLanguageEncodingFlag	Whether to set the language encoding flag if the encoding is UTF-8.	No
createUnicodeExtraFields	Whether to create Unicode extra fields to store the file names a second time inside the entry's metadata.	No
fallbacktoUTF8	Whether to use UTF-8 and the language encoding flag instead of the specified encoding.	No
flattenAttributes	Whether to merge attributes occurring more than once in a section.	No
zip64Mode	When to use Zip64 extensions for entries.	No

JAR Example

Jar all files in the ${build}/classes directory into a file called app.jar in the ${dist}/lib directory. <jar destfile="${dist}/lib/app.jar" basedir="${build}/classes"/>

Next TopicApache Ant AntStructure

← prev next →