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Editorial Team
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Asked: 2026-06-13T06:23:17+00:00

here is my java code that construct the base64 String from image. Then place

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here is my java code that construct the base64 String from image. Then place the base64 String html, to view
the constructed image, but image is not constructed somehow

public void getBase64String() throws FileNotFoundException {
    FileInputStream itStrm = new FileInputStream(
    "E:\\image\\56255254-flower.jpg");//image is lying at http://danny.oz.au/travel/mongolia/p/56255254-flower.jpg
    String str = itStrm.toString();
    byte[] b3 = str.getBytes();
    String base64String = new sun.misc.BASE64Encoder().encode(b3);
    //output of base64String is amF2YS5pby5GaWxlSW5wdXRTdHJlYW1AMTdlMDYwMA==
  }

Now in html page i placed the output of base64String in img tag to view the image.But image does not shows up
(instead it display the cross image icon). I am not getting image is not displayed from base64 String below?

      <HTML>
      <BODY>
           <img    src="data:image/jpeg;base64,amF2YS5pby5GaWxlSW5wdXRTdHJlYW1AMTdlMDYwMA=="/>

     </BODY>
     </HTML>

EDIT:- Thanks Folks, i used byte[] bytes = IOUtils.toByteArray(is);. It worked for me!!

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1 Answer

  1. Editorial Team

    This: String str = itStrm.toString() is not the image but the toString() representation of the FileInputStream instance.

    You’ll have to read the bytes from the stream and store them in a byte array. And, for performance reasons, buffer the stream:

    BufferedInputStream itStrm = new BufferedInputStream(FileInputStream(
    "E:\\image\\56255254-flower.jpg"));

    Further reading (Spoiler: solution inside)

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