JAVA文件加密解密

1、import java.io.File;import java.io.Filel nputStream;import java.io.FileOutputStream;*加密解密類* author shaohl* version 1.00*/public class filekey / static boolea n debug =false ;/ 加密KEY不能隨便改動(dòng)staticfinalbyteKEYVALUE"6J(9-p35%3#4S!4S0)$Y%A&5(j. &人& o(param String* oldFile* param String* n

2、 ewFile* return0)$Y%!#O*GpG=+j. &6人)(0-=+" .getBytes();static final int BUFFERLEN = 512;public filekey() /*/public static void en cryptFile(Stri ng oldFile, Stri ng n ewFile) throws Excepti on Filel nputStream in = new Filel nputStream(oldFile);File file = new File( newFile);if (!file.exist

3、s()file.createNewFile();FileOutputStream out = new FileOutputStream(file);int c, pos, keyle n;pos = 0;keyle n = KEYVALUE.le ngth;* 對(duì)文件進(jìn)行加密byte buffer = new byteBUFFERLEN;while (c = in. read(buffer) != -1) for (int i = 0; i < c; i+) bufferi A= KEYVALUEpos;out.write(bufferi);pos+;if (pos = keyle n)

4、pos = 0;in .close();out.close();*對(duì)文件進(jìn)行解密* param String* oldFile原始要解密的文件* param String* n ewFile解密后的文件* return*/public static void decryptFile(Stri ng oldFile, String n ewFile) throws Excepti on Filel nputStream in = new Filel nputStream(oldFile);File file = new File( newFile);if (!file.exists()file.

5、createNewFile();FileOutputStream out = new FileOutputStream(file);int c, pos, keyle n;pos = 0;keyle n = KEYVALUE.le ngth;byte buffer = new byteBUFFERLEN;while (c = in. read(buffer) != -1) for (int i = 0; i < c; i+) bufferi a= KEYVALUEpos;out.write(bufferi);pos+;if (pos = keyle n)pos = 0;in .close

6、();out.close();* param args*/public static void main( Stri ng args) / TODO Auto-ge nerated method stub try / debug =false ;Stri ng oldFile = new Stri ng("C:UsersAdmi nistratorWDesktopWjava課設(shè)需要加密的文件.txt");Stri ng n ewFile = new Strin g("C:UsersAdmi nistratorDesktopjava課設(shè)加密之后.txt")

7、;Stri ng oldFile仁 new Stri ng("C:UsersAdmi nistratorWDesktopWjava課設(shè)加密之后.txt");String newFile仁 new Stri ng("C:UsersAdmi nistratorWDesktopWjava課設(shè)解密之后.txt");en cryptFile(oldFile, n ewFile); decryptFile(oldFile1, newFile1);System.out.pri ntl n( "ok"); catch (Excepti on e) e

8、.pri ntStackTrace(); import java.awt.FlowLayout;import java.awt.eve nt.Act ionEvent;import java.awt.eve nt.Act ion Liste ner;import javax.swi ng.J Butt on;import javax.swi ng.JF rame;import javax.swi ng.J TextField;/窗體、public class SimpleFrame exte nds JFrame impleme nts Actio nListe nerJButton jBut

9、to n1,jButt on 2;int i=0;private Object oldfile;private Object n ewfile;private Object oldfile1;private Object n ewfile1;private filekey f;public SimpleFrame (Stri ng title)super(title);filekey f1= new filekey();jButton仁new JButton(”加密");jButton2=new JButton(”解密");JTextField tf=new JTextFi

10、eld(15);setLayout (new FlowLayout();jButt on 1.addActi on Liste ner(this);jButt on 2.addActi on Liste ner(this);add(jButto n1);add(jButto n2);add(tf);setSize(400,300);this.setVisible(true); this.setDefaultCloseOperatio n(JFrame.EXIT_ON_CLOSE);II窗體public static void main( Stri ng args) Stri ng oldfil

11、e = new Stri ng("C:UsersAdmi nistratorWDesktopWjava課設(shè)需要加密的文件.txt");Stri ng n ewfile = new Strin g("C:UsersAdmi nistratorWDesktopWjava課設(shè)加密之后的文件.txt");Stri ng oldfilel = new Stri ng("C:UsersAdmi nistratorWDesktopWjava課設(shè)加密之后的文件.txt");String n ewfilel = new Strin g("C:

12、UsersAdmi nistratorDesktopjava文件加密解密");課設(shè)解密之后的文件.txt");SimpleFrame frame =new SimpleFrame (" frame.jiemi();if(frame.i<0) filekey f=new filekey(); try f. en cryptFile(oldfile, n ewfile); catch (Excepti on e) / TODO Auto-ge nerated catch blocke.pri ntStackTrace();public void jiemi()i-;System.out.pri nt(”);/")；事件處理JJJpublic void action Performed(Acti onEvent ae) if(ae.getSource()=jButt on1)en cryptFile(oldfile, n ewfile);System.out.pri nt(”else if(ae.ge