CODEWITHSUNDEEP
java
Abdul
Abdul

Reputation: 1040

Need to read a tar.gz file inside a jar as file

I am trying to access the file inside a jar but getting exception

String tarFilePath = "data/";

My code looks like below I am trying in couple of ways one by reading as stream and trying to access from stream

InputStream in1 = getClass().getResourceAsStream(tarFilePath + "test_data.tar.gz");
                TarArchiveInputStream tarArchiveInputStream= new TarArchiveInputStream(new GzipCompressorInputStream(in1));

java.lang.NullPointerException
    at org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream.<init>(GzipCompressorInputStream.java:128)
    at org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream.<init>(GzipCompressorInputStream.java:100)
    at com.motive.systemtest.stepsdef.HttpReceiverSteps.given_method(HttpReceiverSteps.java:54)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

2nd way

File file = new File(getClass().getClassLoader().getResource(tarFilePath + tarFileName).getFile());

 java.io.FileNotFoundException: file:/home/username/Projects/systemtest/target/systemtest-1.0.0-fat-tests.jar!/data/test_data.tar.gz (No such file or directory)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(FileInputStream.java:195)
        at java.io.FileInputStream.<init>(FileInputStream.java:138)
        at org.apache.http.entity.FileEntity.writeTo(FileEntity.java:94)
        at org.apache.http.entity.HttpEntityWrapper.writeTo(HttpEntityWrapper.java:94)
        at org.apache.http.impl.client.EntityEnclosingRequestWrapper$EntityWrapper.writeTo(EntityEnclosingRequestWrapper.java:112)
        at org.apache.http.impl.entity.EntitySerializer.serialize(EntitySerializer.java:118)
        at org.apache.http.impl.AbstractHttpClientConnection.sendRequestEntity(AbstractHttpClientConnection.java:266)
        at org.apache.http.impl.conn.ManagedClientConnectionImpl.sendRequestEntity(ManagedClientConnectionImpl.java:216)
        at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:238)
        at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123)
        at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:686)
        at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:488)
        at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:884)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
        at com.motive.systemtest.stepsdef.HttpReceiverSteps.postChunkFileHttpReceiver(HttpReceiverSteps.java:146)
        at com.motive.systemtest.stepsdef.HttpReceiverSteps.given_method(HttpReceiverSteps.java:66)

1 st way throws null pointer exception and second throws file not found exception . enter image description here

Is it possible to access resource under a jar as file Please check and help me on this

Upvotes: 0

Views: 1274

Answers (1)

leftbit
leftbit

Reputation: 838

Your first attempt should work, only tarFilePath must start with a slash.

getClass().getResourceAsStream("/data/test_data.tar.gz")

begins from the root directory of your jar.

getClass().getResourceAsStream("data/test_data.tar.gz")

looks into a subdirectory relative to your class file.

Upvotes: 1

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