import?java.io.BufferedInputStream;??
import?java.io.BufferedOutputStream;??
import?java.io.File;??
import?java.io.FileInputStream;??
import?java.io.FileOutputStream;??
import?javax.crypto.Cipher;??
import?javax.crypto.spec.IvParameterSpec;
import?javax.crypto.spec.SecretKeySpec;??
??
public?class?Test?{??
??????
????private?static?final?int?ZERO?=?0;??
????private?static?final?int?ONE?=?1;?
????//實驗操作路徑
????private?static?String?derectory?=?“E:\\StudyDocu\\code\\sth“;?
?????
????
??????
????public?static?void?main（String[]?args）?{??
????	//key：?加密密鑰
????	String?key?=?“aaaabbbbccccdddd“;
????????//ivParameter：AES?cbc加密模式的iv向量
????	String?ivParameter?=?“AAAABBBBCCCCDDDD“;
????????try?{?????
????????	//對給出的密文的解密過程。
????????	//密文保存在“密文.txt”中
????????	//將解密結果保存在“明文.txt”中
????????????File?file?=?new?File（derectory+“/“+“密文.txt“）;??
????????????String?fileName?=?“明文.txt“;
????????????decriptfile（filekeyivParameterfileName）;??
????????????
????????????//對自己的學號姓名的加密過程。
????????	//學號姓名保存在“學號姓名.txt中”
????????	//將加密結果保存在“encrypt_Id&Name.txt”中
????????????String?fileName1?=?“encrypt_Id&Name.txt“;
????????????File?file2?=?new?File（derectory+“/“+“學號姓名.txt“）;
????????????encryptfile（file2?key?ivParameterfileName1）;
????????}?catch?（Exception?e）?{??
????????????e.printStackTrace（）;??
????????}??
????}???
??
????/**?
?????*?文件處理方法?
?????*?code為加密或者解密的判斷條件?
?????*?file?密文文件
?????*?key?加密密鑰?
?????*?ivParameterm?iv向量
?????*?filename?加解密結果存入的文件名
?????*/??
????public?static?void?doFile（int?code?Fil