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Editorial Team
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Asked: 2026-05-26T20:01:04+00:00

In a lift project, I put the db configurations in a file called db.properties

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In a lift project, I put the db configurations in a file called db.properties

/src/main/resources/db.properties

And in my Boot.scala, I read it as:

val input = this.getClass.getResourceAsStream("db.properties")
println("### input: " +input)

val db = new java.util.Properties
db.load(input)

val url = db.getProperty("url")  
println("#### url:" + url)

Then I start sbt:

sbt prepare-web jetty-start

The console prints some errors:

### input: null
21:48:55.906 [main] ERROR n.liftweb.http.provider.HTTPProvider - Failed to Boot! Your application may not run properly
java.lang.NullPointerException: null
    at java.util.Properties$LineReader.readLine(Properties.java:418) ~[na:1.6.0_27]
    at java.util.Properties.load0(Properties.java:337) ~[na:1.6.0_27]
    at java.util.Properties.load(Properties.java:325) ~[na:1.6.0_27]
    at bootstrap.liftweb.Boot.boot(Boot.scala:21) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.

It’s strange lift can’t find the db.properties!

I’ve checked target/webapp/WEB-INF/classes, and db.properties is there! Where is wrong?

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1 Answer

  1. Editorial Team

    The code you posted should work – you might try

    val input = getClass.getResourceAsStream("/db.properties")

    Alternatively you might try the built-in Lift Props meccano:
    http://www.assembla.com/wiki/show/liftweb/Properties

    If you use Mapper (= persistence framework that comes with Lift) you might have a look at:
    http://www.assembla.com/spaces/liftweb/wiki/Mapper

    If everything fails – ask the friendly lift community:
    http://groups.google.com/group/liftweb

    Hope that helps
    Paul

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