BAEL-1846: Java Image to Base64 String

core-java-8/src/main/java/com/baeldung/fileToBase64StringConversion/FileToBase64StringConversion.java

@@ -0,0 +1,32 @@
+package com.baeldung.fileToBase64StringConversion;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.Base64;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FilenameUtils;
+
+public class FileToBase64StringConversion {
+	public static void main(String[] args) throws FileNotFoundException, IOException {
+		//read file path from first argument
+		String filePath = args[0];
+		
+		byte[] fileContent = FileUtils.readFileToByteArray(new File(filePath));
+		String encodedString = Base64.getEncoder().encodeToString(fileContent);
+
+		//print encoded base64 String
+		System.out.println(encodedString);
+		
+		//construct output file name
+		String extension = FilenameUtils.getExtension(filePath);
+		String baseFileName = FilenameUtils.getBaseName(filePath);
+		String directory = new File(filePath).getParentFile().getAbsolutePath();
+		String outputFileName = directory+File.separator+baseFileName+"_copy."+extension;
+		
+		//decode the string and write to file
+		byte[] decodedBytes = Base64.getDecoder().decode(encodedString);
+		FileUtils.writeByteArrayToFile(new File(outputFileName), decodedBytes);
+	}
+}