The path of the configuration file cannot be obtained after the jar package is created for the project.

The path of the configuration file cannot be obtained after the jar package is created for the project.

 

Today, I am working on a Java project in development. I want to read the information in the configuration file. when the project is packaged with a jar package, the configuration file cannot be found. The problem is finally solved and I will share it with you.

Method 1: getresource (this method is useful in the war package, but not in the jar package ):

Public static void main (string [] ARGs) {string Path = app. class. getclassloader (). getresource ("config. properties "). getpath (); system. err. println (PATH); file = new file (PATH); If (! File. exists () {system. out. print ("config. the properties file does not exist ");} else {system. err. println ("absolute path:" + file. getabsolutepath ());}}
========================================================== ============================
Result:

/D:/git/practice/Kafka-practice/target/classes/config. Properties
Absolute path: D: \ git \ practice \ Kafka-practice \ target \ Classes \ config. Properties

Method 2: getresourceasstream (required for jar packages)

Public static void main (string [] ARGs) throws ioexception {inputstream in = app. class. getclass (). getresourceasstream ("/config. properties "); properties prop = new properties (); prop. load (in); system. err. println (PROP );}
========================================================== ==============
Result:

{Metadata. Broker. List = cluster1: 9092, compression. codec = 1, Zookeeper. Connect = cluster1: 2181, cluster2: 2181, cluster3: 2181, producer. type = async}

The path of the configuration file cannot be obtained after the jar package is created for the project.