Convert Java String to InputStream

In this tutorial, I am showing how to convert Java String to InputStream using plain Java, Java 8 and Apache Commons IO library.

An InputStream is connected to some data streams like a file, memory bufferes, network connection, pipe etc. It is used for reading the data from above sources.

You can also check converting Java InputStream to String  (java InputStream to String)



Convert String to InputStream Using JDK
import java.io.ByteArrayInputStream;
import java.io.IOExce⁞ption;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

public class Test {

	public static void main(String[] args) throws IOException {

		String hello = "hello world";
		InputStream is = new ByteArrayInputStream(hello.getBytes(StandardCharsets.UTF_8));

	}
}

Convert String to InputStream Using Java 8

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

public class Test {

	public static void main(String[] args) throws IOException {

		String hello = "hello world";
		InputStream is = new ByteArrayInputStream(StandardCharsets.UTF_8.encode(hello).array());

	}
}



Convert String to InputStream Using Apache Commons IOUtils

import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;



public class Test {

	public static void main(String[] args) throws IOException {

		String hello = "hello world";
		InputStream is = IOUtils.toInputStream(hello);

	}
}









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