DES对称分组密码系统 importjava.security.spec.*; importjavax.crypto.*; importjavax.crypto.spec.*; classDES01{ privateStringstrkey; privateSecretKeyskey=null; privateString[]algo= {"DES/ECB/PKCS5Padding","DES/ECB/NoPadding","DES"}; publicDES01(Stringkey) { strkey=k