What to import to use IOUtils.toString()?

Question

I am trying to use IOUtils.toString() to read from a file. However, I am getting an error saying "IOUtils cannot be resolved."

What am I supposed to be importing to allow me to use this function?

String everything = IOUtils.toString(inputStream);

Thanks

Use this.. http://stackoverflow.com/questions/14768166/ioutils-exception-android — Ahmed Z., May 14 '13 at 04:19

score 55 · Answer 1 · edited Jul 27 '23 at 06:17

55

import org.apache.commons.io.IOUtils;

If you still can't import add to pom.xml:

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.5</version>
</dependency>

or for direct jar/gradle etc visit: http://mvnrepository.com/artifact/commons-io/commons-io/2.5

Also since version 2.5 of commons-io method IOUtils.toString(inputStream) has been deprecated. You should use method with Encoding i.e.

IOUtils.toString(is, "UTF-8");

edited Jul 27 '23 at 06:17

Pang

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answered Jun 06 '16 at 22:20

Fryta

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Is it deprecated in favor of what method? – Raffael Bechara Rameh Apr 04 '17 at 16:50
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Same method name but with one additional parameter - encoding. 'IOUtils.toString(is, "UTF-8");' – Fryta Apr 09 '17 at 21:10
This is eating all my memory – Ravipati Praveen Jan 18 '19 at 09:23
1

Of course! Why would it not be something like org.apache.commons or similar? Gaaaaaaaaaaaaaa thanks for answer. – granadaCoder Mar 08 '19 at 14:26
For more relevant deprecation info please see the official document at https://commons.apache.org/proper/commons-io/javadocs/api-2.5/deprecated-list.html. – Kris Stern Mar 26 '23 at 12:46

score 14 · Answer 2 · edited Nov 23 '18 at 05:27

14

import org.apache.commons.io.IOUtils;

edited Nov 23 '18 at 05:27

SMR

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answered Sep 30 '13 at 18:20

kracejic

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Unable to import this. Please help – Vaibhav Jhaveri Apr 21 '15 at 11:50
Check the answer of @Fryta, you need to add a library to your project. – thuanle Feb 23 '17 at 03:58

score 10 · Answer 3 · answered Oct 17 '19 at 08:49

10

Fryta's answer outline how to actually use IOUtils and snj's answer is good for files.

If you're on java 9 or later and you have an input stream to read you can use InputStream#readAllBytes(). Just create a string from there and don't forget to specify charset.

String s = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);

answered Oct 17 '19 at 08:49

thoredge

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This is the only answer that worked for me.. running Java v17. – Charles Jul 04 '22 at 10:27
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When the `inputStream` originates from a `Path` (or a `File` which you can [easily convert to a `Path`](https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/File.html#toPath())), you can use [`String s = Files.readString(path);`](https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/nio/file/Files.html#readString(java.nio.file.Path)) in the first place. Otherwise, this `readAllBytes()` based solution is the most pragmatic approach. – Holger Aug 25 '22 at 16:27

score 3 · Answer 4 · answered Oct 21 '18 at 13:43

3

Alternatively you can try following way. It worked for me for reading public key for resource server

        final Resource resource = new ClassPathResource("public.key");
        String publicKey = null;
        try {
            publicKey = new String(Files.readAllBytes(resource.getFile().toPath()), StandardCharsets.UTF_8);
        } catch (IOException e) {
            e.printStackTrace();
        }

answered Oct 21 '18 at 13:43

Sanjay Sharma

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Why did you add jar there ? – Sanjay Sharma Feb 08 '19 at 09:13
I am using nohup to run java project. – Dilip Dalwadi Feb 08 '19 at 12:38
It should work for jar also even if you are running jar in background in linux machine. Please share the error. – Sanjay Sharma Feb 08 '19 at 16:18

score 1 · Answer 5 · answered Feb 17 '15 at 07:00

Here is code for How to convert InputStream to String in Java using Apache IOUtils

Reference : https://commons.apache.org/proper/commons-io/javadocs/api-2.4/org/apache/commons/io/IOUtils.html

FileInputStream fis = new FileInputStream(FILE_LOCATION);
String StringFromInputStream = IOUtils.toString(fis, "UTF-8");
System.out.println(StringFromInputStream);

Let me know if you need more help.

score 0 · Answer 6 · answered Jan 03 '23 at 13:28

The following import statement would be required:

import org.apache.commons.io.IOUtils;

If the error "The import org.apache.commons.io cannot be resolved" shows up, add the commons-io-2.6.jar to the project Java buildpath and/or to the project lib folder.

Note: The suggestion to import "import org.apache.commons.io.IOUtils;" usually doesn't appear in Eclipse IDE at least in the context of this question.

What to import to use IOUtils.toString()?

6 Answers6