work sun.misc.BASE64Encoder/Decoder for getting byte[]

Question

I am trying to use sun.misc.BASE64Encoder/Decoder, but this code:

(new sun.misc BASE64Encoder()).encode(new    
    sun.misc.BASE64Decoder().decodeBuffer("test string XML:"))

returns "test/string/XML/" I am embarrassed

score 22 · Accepted Answer · answered Feb 15 '10 at 15:48

22

Don't use sun.misc or com.sun classes. They are not guaranteed to be consistent between different versions of the jre.

Use commons-codec Base64.encodeBase64(..) and Base64.decodeBase64(..)

answered Feb 15 '10 at 15:48

Bozho

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hehe.. I sent my recent project in which sun.misc.BASE64Encoder/Decoder used to a customer. Didn't know about inconsistency in different jre's. I hope it's a rare issue. – Roman Feb 15 '10 at 16:14
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It's actually been working fine since JDK 1.1, but it's still ugly to use internal APIs. From a purely practical standpoint, you have nothing to worry about. – Tomer Gabel Jun 15 '11 at 19:42
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Why not to use sun.* packages: http://www.oracle.com/technetwork/java/faq-sun-packages-142232.html – justderb Mar 06 '14 at 22:40

score 15 · Answer 2 · edited Mar 07 '12 at 12:42

15

Use Class:

javax.xml.bind.DatatypeConverter

It has 2 methods of interest:

public static byte[] parseBase64Binary( String lexicalXSDBase64Binary )
public static String printBase64Binary( byte[] val )

edited Mar 07 '12 at 12:42

Chandra Sekhar

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answered Mar 06 '12 at 16:42

Diego

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I've been looking for a reliable way to convert Base64 using the native libraries for days now. Thanks! – bradreaves May 02 '12 at 21:23

score 7 · Answer 3 · answered Feb 15 '10 at 15:50

You first decoding the string "test string XML:", which isn't really valid Base64, since it contains spaces and a colon, none of which are valid B64 characters. I think that you meant to encode then decode, like this:

(new sun.misc.BASE64Decoder().decodeBuffer(new sun.misc.BASE64Encoder().encode("test string XML:"))

George Armhold · Answer 4 · 2010-02-15T15:55:12.147

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I think you want:

String s = "Hello world";
new sun.misc.BASE64Encoder().encode(s.getBytes("UTF-8"));

Even better, use the commons utils as the previous answer suggested. Only use sun.misc.Base64Encoder if you can't afford to add the external dependency on another jar.

edited Feb 15 '10 at 15:55

answered Feb 15 '10 at 15:49

George Armhold

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work sun.misc.BASE64Encoder/Decoder for getting byte[]

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