Eclipse: load my own JAR file before an Eclipse plugin

Question

I want to use the latest version of org.json in my Google App Engine project. My project uses GWT plugins, which provide their own, older version of org.json, so if I put my json.jar file into WEB-INF/lib it gets ignored. If I go to the Eclipse project's Properties > Java Build Path > Libraries to remove the GWT JDK jar the project won't compile. If I use the same properties tab to add my own json.jar to the list of libraries (via Add Jars... ) it doesn't help.

Is there anything I can do, or am I stuck with the older version of org.json?

EDIT : I'm not using Maven.

Answer 1

GWT no longer uses org.json since 2.7, so all you'd have to do is use an up-to-date version.

That said, even with GWT 2.6.1 or older, you should be able to:

• compile against your more recent version of org.json by putting it above the GWT JDK in Properties > Java Build Path > Order and Export
• run with your more recent version of org.json by putting into WEB-INF/lib . If that's not enough, you'll maybe have to remove gwt-servlet-deps.jar (which contains org.json classes) and replace it with validation-api-1.0.0.GA.jar . That however will only with GWT 2.6; with an even-older version you're out of luck (but 2.6.0 is almost 2 years old already, and 2.5.0 3 years old, that's an eternity at web scale)