byte[] key=Base64.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4".getBytes(), Base64.DEFAULT); byte[] data=value.getBytes("UTF-8"); System.out.println("ECB加密解密"); byte[] str3 = Des3.des3EncodeECB(key,data ); byte[] str4 = Des3.ees3DecodeECB(key, str3); System.out.println(new String(Base64.encode(str3, Base64.DEFAULT),"UTF-8")); System.out.println(new String(str4, "UTF-8"));android的 Base64原文：http://www.cnblogs.com/zmc/p/4387780.html