read from file that located in resources glassfish java

Question

I have a maven java ee application

Path to the file is

~/Work/appname/WebContent/resources/json/menu.json

After deploying on glassfish file located here:

~/Tools/glassfish4/glassfish/domains/domain1/applications/appname/resources/json/menu.json

In this file stores menu in json format. I need to do basic crud (create, read, update, delete) operations with this file.

I've tried to get file like this:

InputStream inputStream  = ModulMenuUtil.class.getClassLoader().getResourceAsStream("/menu.json");

I get a NullPointerException. I don't know how to get path to this file. Please help me.

Answer 1

Make sure your json folder and the file are placed under src/main/resources .

Try the following:

this.getClass().getClassLoader().getResourceAsStream("json/menu.json");

or (not recommended)

Thread.currentThread().getContextClassLoader().getResourceAsStream("json/menu.json");

If both methods don't work you can also try to put the file in the root of your src folder.

See also:

• Where to place and how to read configuration resource files in servlet based application?
• getClassLoader().getResourceAsStream(“../resources/config.properties”) returns null
• file path in WebApplication using GlassFish
• Why does getResource return null
• getResourceAsStream() is always returning null