Get values from properties file using Groovy - groovy

Question

How to get values from properties file using Groovy?
I require to have a property file (.properties) which would have file names as key, and their destination path as the value. I will need the key to be resolved at runtime, depending on file that needs to be moved.
So far I am able to load the properties it seems but can't "get" the value from the loaded properties.
I referred to the thread : groovy: How to access to properties file? and following is the code snippet i have so far
def props = new Properties();
File propFile =
new File('D:/XX/XX_Batch/XX_BATCH_COMMON/src/main/resources/patchFiles.properties')
props.load(propFile.newDataInputStream())
def config = new ConfigSlurper().parse(props)
def ant = new AntBuilder()
def list = ant.fileScanner {
fileset(dir:getSrcPath()) {
include(name:"**/*")
}
}
for (f in list) {
def key = f.name
println(props)
println(config[key])
println(config)
def destn = new File(config['a'])
}
the properties file has the following entries for now :
jan-feb-mar.jsp=/XX/Test/1
XX-1.0.0-SNAPSHOT.jar=/XX/Test/1
a=b
c=d
Correct values are returned if I look up using either props.getProperty('a')
or,
config['a']
Also tried the code: notation
But as soon as switch to using the variable "key", as in config[key] it returns --> [:]
I am new to groovy, can't say what am i missing here.

Answer 1

It looks to me you complicate things too much.
Here's a simple example that should do the job:
For given test.properties file:
a=1
b=2
This code runs fine:
Properties properties = new Properties()
File propertiesFile = new File('test.properties')
propertiesFile.withInputStream {
properties.load(it)
}
def runtimeString = 'a'
assert properties."$runtimeString" == '1'
assert properties.b == '2'

Answer 2

Unless File is necessary, and if the file to be loaded is in src/main/resources or src/test/resources folder or in classpath, getResource() is another way to solve it.
eg.
def properties = new Properties()
//both leading / and no / is fine
this.getClass().getResource( '/application.properties' ).withInputStream {
properties.load(it)
}
//then: "access the properties"
properties."my.key"

Answer 3

Had a similar problem, we solved it with:
def content = readFile 'gradle.properties'
Properties properties = new Properties()
InputStream is = new ByteArrayInputStream(content.getBytes());
properties.load(is)
def runtimeString = 'SERVICE_VERSION_MINOR'
echo properties."$runtimeString"
SERVICE_VERSION_MINOR = properties."$runtimeString"
echo SERVICE_VERSION_MINOR

Answer 4

Just in case...
If a property key contains dot (.) then remember to put the key in quotes.
properties file:
a.x = 1
groovy:
Properties properties ...
println properties."a.x"

Answer 5

Properties properties = new Properties()
properties.load(new File("path/to/file.properties").newReader())

Answer 6

Just another way of doing it. Use this if it works for you. :)
Properties properties = new Properties()
//loading property file
File propertiesFile = new File(this.class.getResource('application.properties').getPath())
propertiesFile.withInputStream {
properties.load(it)
}
//Accessing the value from property file
properties.getProperty('userName')

Answer 7

With static method extension:
Properties.metaClass.static.fromFile =
{file -> new Properties().with{new File(file).withInputStream it.&load;it}}
def properties = Properties.fromFile('test.properties')

Answer 8

Groovy for getting value of property from "local.properties" by giving key.
Example- For finding value of this property's key is "mail.smtp.server"
In V5
ctx.getBean("configurationService")
configurationService = ctx.getBean("configurationService")
String value = configurationService.getConfiguration().getString("mail.smtp.server","")
In 1905
spring.getBean("configurationService")
configurationService = spring.getBean("configurationService")
String value = configurationService.getConfiguration().getString("mail.smtp.server","")