####一、说明
Test.java：总测试程序。
AESHelper.java：AES加解密工具。
DESedeHelper.java：3DES加解密工具。
RSAHelper.java：RSA加解密工具。
SignatureHelper.java：MD5, SHA-1签名工具。
Base64.java及Hex.java：字符串与字节码转换工具。
####二、其它 Base64如报错，请用security中的jar文件换掉JRE/lib/security中的jar包。
####Author
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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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