May 25, 2021 Apache Ant
When you only need to set a small number of properties, you can choose to set them directly in the build file. However, for large projects, it is a good idea to store the information that sets the properties in a separate file.
Storing property information in a separate file provides the following benefits:
There are no hard rules here, but in general, property files are named build.properties and are stored on the same .xml as build files. You can create multiple build.build.properties.dev based on the deployment environment, such as: web security and build.properties.test.
The build..xml files associated with it are shown in the following example:
<?xml version="1.0"?>
<project name="Hello World Project" default="info">
<property file="build.properties"/>
<target name="info">
<echo>Apache Ant version is ${ant.version} - You are at ${sitename} </echo>
</target>
</project>
# The Site Name
sitename=wiki.w3cschool.cn
buildversion=3.3.2
Notice that in the above exercise, sitename is a custom property that maps after execution to a Web site wiki.w3cschool.cn "Property". Y ou can declare any number of properties in this way. In the example above, there is also a custom property buildversioin that indicates the version number currently built.
In addition to the two properties mentioned above, Ant provides additional built-in properties, which were mentioned in the previous section, but we'll give the related properties again.
Property | Describe |
ant.file | Represents the absolute path of buildfile. |
ant.version | Represents the version of Ant. |
basedir | Represents the absolute path to the project base directory. |
ant.jave.version | Represents the version of the JDK detected by Ant. |
ant.project.name | Represents the name of the project currently specified. |
ant.project.default-target | Represents the default target for the current project. |
ant.project.invoked-targets | Represents a series of comma-separated targets that are called by the current project. |
ant.core.lib | Represents the absolute path to the Ant jar file. |
ant.home | Represents the root of the Ant installation. |
ant.library.dir | Represents the Ant library, typically the root of ANT_HOME/lib file. |
In the example of this section, the Ant built-in property we use is the ant.version property.