How to convert an Image to base64 string in java? [duplicate]

Question

It may be a duplicate but i am facing some problem to convert the image into Base64 for sending it for Http Post. I have tried this code but it gave me wrong encoded string.

 public static void main(String[] args) {             File f =  new File("C:/Users/SETU BASAK/Desktop/a.jpg");              String encodstring = encodeFileToBase64Binary(f);              System.out.println(encodstring);        }         private static String encodeFileToBase64Binary(File file){             String encodedfile = null;             try {                 FileInputStream fileInputStreamReader = new FileInputStream(file);                 byte[] bytes = new byte[(int)file.length()];                 fileInputStreamReader.read(bytes);                 encodedfile = Base64.encodeBase64(bytes).toString();             } catch (FileNotFoundException e) {                 // TODO Auto-generated catch block                 e.printStackTrace();             } catch (IOException e) {                 // TODO Auto-generated catch block                 e.printStackTrace();             }              return encodedfile;         } 

Output: [B@677327b6

But i converted this same image into Base64 in many online encoders and they all gave the correct big Base64 string.

Edit: How is it a duplicate?? The link which is duplicate of mine doesn't give me solution of converting the string what i wanted.

What am i missing here??

Answer 1

The problem is that you are returning the toString() of the call to Base64.encodeBase64(bytes) which returns a byte array. So what you get in the end is the default string representation of a byte array, which corresponds to the output you get.

Instead, you should do:

encodedfile = new String(Base64.encodeBase64(bytes), "UTF-8");