如下所示 ：
Paket cn.sunzn.md5; impor java.security.messagedigest; impor java.security.nosuchalgorithMexception; kelas publik str2md5 {public static void main (string [] args) {md5 ("sunzn"); } private static string md5 (string sourcestr) {string result = ""; Coba {MessageDigest MD = MessageSpetedigest.getInstance ("md5"); md.update (sourcestr.getbytes ()); byte b [] = md.digest (); int i; StringBuffer buf = New StringBuffer (""); untuk (int offset = 0; offset <b.length; offset ++) {i = b [offset]; if (i <0) i += 256; if (i <16) buf.Append ("0"); buf.append (integer.tohexstring (i)); } result = buf.toString (); System.out.println ("MD5 (" + Sourcestr + ", 32) =" + Hasil); System.out.println ("MD5 (" + Sourcestr + ", 16) =" + buf.tostring (). Substring (8, 24)); } catch (nosuchalgorithMexception e) {System.out.println (e); } hasil pengembalian; }}MD5 (Sunzn, 32) = 40379dB889F9124819228947FAAEB1F7MD5 (Sunzn, 16) = 89F912481928947
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