java 异或加密 c语言解密 java对文件简单的加密解密(异或运算)

package xxx;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

/**

* 第一次加密，执行第二次解密

* @author ex-huanggongguo001

* @version 2月26日下午5:11:40

*/

public class 加密解密 {

public static void main(String[] args) throws IOException {

File file = new File("D:/tmp/test");

InputStream is = new FileInputStream(file);

writeToLocal("D:/tmp/test2",is);

}

/**

* 流写入本地文件

*

* @param destination

* @param input

* @throws IOException

*/

private static void writeToLocal(String destination, InputStream input)

throws IOException {

int index;

byte[] bytes = new byte[1024];

byte[] bytes2 = new byte[1024];

FileOutputStream downloadFile = new FileOutputStream(destination);

while ((index = input.read(bytes)) != -1) {

for (int i = 0; i

//通过异或运算某个数字或字符串(这里以2为例)

bytes2[i] = (byte) (bytes[i]^2);

}

downloadFile.write(bytes2, 0, index);

downloadFile.flush();

}

downloadFile.close();

}

}