1. Encoding Image to an BASE64 format so that it can be shared to web application via Backend Rest API.
Step 1: Download any image and place it in a folder accessible to java project
Step 2: Run the below Java Code to generate Base64 content of the above image
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Base64;
public class ImageToBase64Conversion {
public static void main(String[] args) throws IOException {
// Path to our image file
String imageBasePath = "/Users/pranayp/Documents/Project/Personal/sample-java-project/src/main/resources/image/";
String arrowImage = imageBasePath + "arrows.jpg";
try {
// Convert image to Base64
String base64Image = encodeImageToBase64(arrowImage);
// Print the Base64 string
System.out.println("--------------------");
System.out.println(base64Image);
System.out.println("--------------------");
} catch (IOException e) {
System.err.println("Exception occurred: " + e.getMessage());
}
}
/**
* Encodes the image at the given path to a Base64 string.
*
* @param imagePath the path of the image file to encode
* @return the Base64-encoded string representation of the image
* @throws IOException if an I/O error occurs during file reading
*/
public static String encodeImageToBase64(String imagePath) throws IOException {
// Create a File object from the given image path
File file = new File(imagePath);
// Allocate a byte array large enough to hold the entire file content
byte[] imageBytes = new byte[(int) file.length()];
// Use try-with-resources to ensure the FileInputStream is closed automatically
try (FileInputStream fileInputStream = new FileInputStream(file)) {
// Read the file content into the byte array
fileInputStream.read(imageBytes);
}
// Encode the byte array to a Base64 string and return it
return Base64.getEncoder().encodeToString(imageBytes);
}
}
Output
Step 3: Copy the Base64 content to any online website which converts base64 to image in order to verify the encoded image
