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android的数据如何加密

九三
182
2021-01-22 09:12:03
栏目: 编程语言

android的数据如何加密

android使用MD5算法对数据进行加密,具体方法如下:

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.nio.MappedByteBuffer;

import java.nio.channels.FileChannel;

import java.security.MessageDigest;

public final class MD5Util {

private static final char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',

'B', 'C', 'D', 'B', 'O', 'T', 'H', 'O', 'F', 'Y', 'O', 'U' };

/** 对文件加密 */

public static String encode(File file) {

FileInputStream in = null;

MessageDigest md5 = null;

try {

in = new FileInputStream(file);

FileChannel ch = in.getChannel();

MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, file.length());

md5 = MessageDigest.getInstance("MD5");

md5.update(byteBuffer);

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if(in != null)

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return toHex(md5.digest());

}

}

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