Java（TM） Cryptography Extension （JCE） v1.2.2

Java 是支持AES256的，不过需要下载Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files from sun website, uncompress the file and copy local_policy.jar and US_export_policy.jar to your $JAVA_HOME\jre\lib\security

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2002-06-27 13:47  jce1.2.2\
     目录           0  2002-06-27 13:47  jce1.2.2\doc\
     目录           0  2002-06-27 13:47  jce1.2.2\doc\apidoc\
     文件       10194  2002-06-27 13:47  jce1.2.2\doc\apidoc\overview-tree.html
     文件       85565  2002-06-27 13:47  jce1.2.2\doc\apidoc\index-all.html
     文件        3736  2002-06-27 13:47  jce1.2.2\doc\apidoc\deprecated-list.html
     文件        3896  2002-06-27 13:47  jce1.2.2\doc\apidoc\allclasses-frame.html
     文件         760  2002-06-27 13:47  jce1.2.2\doc\apidoc\index.html
     文件         645  2002-06-27 13:47  jce1.2.2\doc\apidoc\packages.html
     文件        4596  2002-06-27 13:47  jce1.2.2\doc\apidoc\overview-summary.html
     文件        1121  2002-06-27 13:47  jce1.2.2\doc\apidoc\overview-frame.html
     目录           0  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\
     目录           0  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\
     文件       11715  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\package-summary.html
     文件        7416  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\package-tree.html
     文件        2694  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\package-frame.html
     目录           0  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\
     文件        5752  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\package-summary.html
     文件        5570  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\package-tree.html
     文件         926  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\package-frame.html
     文件        7089  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\DHKey.html
     文件        8422  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\DHPrivateKey.html
     文件        8282  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\interfaces\DHPublicKey.html
     目录           0  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\
     文件        9015  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\package-summary.html
     文件        6448  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\package-tree.html
     文件        1588  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\package-frame.html
     文件       12441  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\DESedeKeySpec.html
     文件       13806  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\DESKeySpec.html
     文件       10301  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\DHGenParameterSpec.html
     文件       12381  2002-06-27 13:47  jce1.2.2\doc\apidoc\javax\crypto\spec\DHParameterSpec.html
............此处省略87个文件信息