[BAEL-18364] move spring-rest-*** articles - 1

libraries/src/main/java/com/baeldung/streamutils/CopyStream.java

@@ -0,0 +1,22 @@
+package com.baeldung.streamutils;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.StringWriter;
+
+import org.apache.commons.io.IOUtils;
+import org.springframework.util.StreamUtils;
+
+public class CopyStream {
+    public static String getStringFromInputStream(InputStream input) throws IOException {
+        StringWriter writer = new StringWriter();
+        IOUtils.copy(input, writer, "UTF-8");
+        return writer.toString();
+    }
+
+    public InputStream getNonClosingInputStream() throws IOException {
+        InputStream in = new FileInputStream("src/test/resources/input.txt");
+        return StreamUtils.nonClosing(in);
+    }
+}