getFile() not working while running spring boot jar

Asked Mar 07 '16 at 08:15

Active Mar 07 '16 at 08:26

Viewed 161 times

I am getting FileNotFoundException."java.io.FileNotFoundException: file:jsonProject/build/libs/library.jar!/state/hierarchy.json (No such file or directory)"

DefaultResourceLoader defaultResourceLoader=new DefaultResourceLoader();
FileWriter writer = new FileWriter(new File(defaultResourceLoader.getResource("state/hierarchy.json").getURL().getFile()));

The file is present in jar in folder /state/hierarchy.json.
I am trying to run us java -jar library.jar. How can I get the file inside jar?

I have tried using this too.

ClassPathResource classPathResource = new ClassPathResource("state/hierarchy.json");
FileWriter writer=new FileWriter(new File(classPathResource.getURL().getFile()));

edited Mar 07 '16 at 08:26

asked Mar 07 '16 at 08:15

Saurabh

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I have tried this , but this also did not work – Saurabh Mar 07 '16 at 08:31
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A file in a jar isn't a file you can access like that. a `File` has to be a resource directly on the file system not inside an archive. – M. Deinum Mar 07 '16 at 08:32
so how I can write in that file inside jar? – Saurabh Mar 07 '16 at 08:33
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@user3142222 You cannot. You can eventually read a file in the jar but not write it. – Arnaud Denoyelle Mar 07 '16 at 08:34
@user3142222 If you need to do some temporary edits on it, you can still copy it to a temp `File` then edit the temp `File`. – Arnaud Denoyelle Mar 07 '16 at 08:35
ok thanks @arnaud ,I want to write to same file .I think I have to convert it to war then instead of deployable jar. – Saurabh Mar 07 '16 at 08:38
@user3142222 jar, war... it will still be a zip file. You cannot write files in a zip file. – Arnaud Denoyelle Mar 07 '16 at 08:39
If you want to edit some data, either you keep an environment variable which points to a file or you use a database. – Arnaud Denoyelle Mar 07 '16 at 08:41

getFile() not working while running spring boot jar

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