java用异或加密解密文件

以下是Java使用异或方式对文件进行加密解密的示例代码：

加密：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class XorEncryptor {
    public static void encrypt(File inputFile, File outputFile, String key) throws IOException {
        FileInputStream inputStream = new FileInputStream(inputFile);
        FileOutputStream outputStream = new FileOutputStream(outputFile);        byte[] buffer = new byte[1024];
        int len;
        int index = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            for (int i = 0; i < len; i++) {
                buffer[i] ^= key.charAt(index % key.length());
                index++;
            }
            outputStream.write(buffer, 0, len);
        }
        inputStream.close();
        outputStream.close();
    }
}

解密：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class XorDecryptor {
    public static void decrypt(File inputFile, File outputFile, String key) throws IOException {
        FileInputStream inputStream = new FileInputStream(inputFile);
        FileOutputStream outputStream = new FileOutputStream(outputFile);
        byte[] buffer = new byte[1024];
        int len;
        int index = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            for (int i = 0; i < len; i++) {
                buffer[i] ^= key.charAt(index % key.length());
                index++;
            }
            outputStream.write(buffer, 0, len);
        }
        inputStream.close();
        outputStream.close();
    }
}

其中，encrypt方法用于加密文件，decrypt方法用于解密文件。key为加密解密的密钥。