Java reading text file in eclipse

Question

I am trying to read a text file available in a different package but in same project but always getting InputStream as null.

public class ReadFileApp {

    public static void main(String[] args) {

        Thread currentThread = Thread.currentThread();
        ClassLoader classLoader = currentThread.getContextClassLoader();
        InputStream inputStream = classLoader.getResourceAsStream("/com/rpsoft/response/fileOneResponse.txt");

        String response = null;
        try {
            response = new String(FileCopyUtils.copyToByteArray(inputStream));
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("Current Thread : " + currentThread);
        System.out.println("Class Loader : " + classLoader);
        System.out.println("InputStream : "+ inputStream);
        System.out.println("Response : " + response);
    }
}

Getting Exception :

Exception in thread "main" java.lang.IllegalArgumentException: No InputStream specified
    at org.springframework.util.Assert.notNull(Assert.java:112)
    at org.springframework.util.FileCopyUtils.copy(FileCopyUtils.java:106)
    at org.springframework.util.FileCopyUtils.copyToByteArray(FileCopyUtils.java:156)
    at com.rpsoft.filetransport.ReadFileApp.main(ReadFileApp.java:18)

Seems that your file doesn't exist.

Luiggi Mendoza
– Luiggi Mendoza

2014-06-17 17:04:38 +00:00
Commented Jun 17, 2014 at 17:04 — Luiggi Mendoza
– Luiggi Mendoza, Commented Jun 17, 2014 at 17:04

Braj · Accepted Answer · 2014-06-17 17:12:33Z

1

You can try any one based on the file location in the project.

// Read from same package 
getClass().getResourceAsStream("fileOneResponse.txt")

// Read from resources folder parallel to src in your project
new File("resources/fileOneResponse.txt")

// Read from src/resources folder
getClass().getResource("/resources/fileOneResponse.txt")

// Read from src/resources folder
getClass().getResourceAsStream("/resources/fileOneResponse.txt")

edited Jun 17, 2014 at 17:12

answered Jun 17, 2014 at 17:05

Braj

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Comments

Shinichi Kai · Accepted Answer · 2014-06-17 17:56:39Z

0

Try removing the leading slash from the resouce name.

classLoader.getResourceAsStream("com/rpsoft/response/fileOneResponse.txt");

instead of

classLoader.getResourceAsStream("/com/rpsoft/response/fileOneResponse.txt");

answered Jun 17, 2014 at 17:56

Shinichi Kai

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1 Comment

Vivek K Singh Over a year ago

Thanks it's solved exactly as you have mentioned above.

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