import java.io.*;
public class MyEncryp {
public static void main(String[] args){
try {
File inFile = new File("D:/work/test.txt");
File outFile = new File("D:/test1.txt");
FileInputStream fis = new FileInputStream(inFile);
FileOutputStream fos = new FileOutputStream(outFile);
int length = fis.available();
for (int i = 0; i < length; i++) {
fos.write(fis.read()+100);
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
test.txt
abcdefghijklmnopqrstuvwxyz
test1.txt
牌侨墒颂臀闲岩釉罩棕仝圮蒉
import java.io.*;
public class MyDecrypt {
public static void main(String[] args){
try {
File f = new File("D:/test1.txt");
FileInputStream fis = new FileInputStream(f);
int length = fis.available();
for (int i = 0; i < length; i++) {
System.out.print((char)(fis.read()-100));
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
import java.io.*;
public class MyEncryp {
public static void main(String[] args){
try {
File inFile = new File("D:/work/test.txt");
File outFile = new File("D:/test1.txt");
FileInputStream fis = new FileInputStream(inFile);
FileOutputStream fos = new FileOutputStream(outFile);
int length = fis.available();
for (int i = 0; i < length; i++) {
fos.write(fis.read()+i%100);
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
运行结果:
acegikmoqsuwy{}�亙厙墜崗憮
/**
* 生成密钥文件
* @author lx
*
*/
import java.io.*;
public class MyKey {
public static void main(String[] args){
try {
File file = new File("D:/key.key");
FileOutputStream fos = new FileOutputStream(file);
for (int i = 0; i < 128; i++) {
fos.write((int)(Math.random()*128));
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
/**
* 加密
*/
import java.io.*;
public class MyEncryp {
public static void main(String[] args){
try {
//读密钥文件
int key[] = new int[128];
File keyFile = new File("D:/key.key");
FileInputStream keyFis = new FileInputStream(keyFile);
for (int i = 0; i < 128; i++) {
key[i] = keyFis.read();
}
//加密
File inFile = new File("D:/work/test.txt");
File outFile = new File("D:/test1.txt");
FileInputStream fis = new FileInputStream(inFile);
FileOutputStream fos =new FileOutputStream(outFile);
int length = fis.available();
for (int i = 0; i < length; i++) {
fos.write(fis.read()+key[i%128]);
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
/**
* 解密
*/
import java.io.*;
public class MyDecrypt {
public static void main(String[] args){
try {
//读密钥文件
int key[] = new int[128];
File keyFile = new File("D:/key.key");
FileInputStream keyFis = new FileInputStream(keyFile);
for (int i = 0; i < 128; i++) {
key[i] = keyFis.read();
}
//解密
File f = new File("D:/test1.txt");
FileInputStream fis = new FileInputStream(f);
int length = fis.available();
for (int i = 0; i < length; i++) {
System.out.print((char)(fis.read()-key[i%128]));
}
} catch (Exception e) {
// TODO: handle exception
}
}
}