56 lines
1.7 KiB
Java
56 lines
1.7 KiB
Java
package com.tarisan.util;
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public class Base64 {
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private static final String base64code = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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+ "abcdefghijklmnopqrstuvwxyz" + "0123456789" + "+/";
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private static final int splitLinesAt = 76;
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public static byte[] zeroPad(int length, byte[] bytes) {
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byte[] padded = new byte[length];
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System.arraycopy(bytes, 0, padded, 0, bytes.length);
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return padded;
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}
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public static String encode(String string) {
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String encoded = "";
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byte[] stringArray;
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try {
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stringArray = string.getBytes("UTF-8");
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} catch (Exception ignored) {
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stringArray = string.getBytes();
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}
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int paddingCount = (3 - (stringArray.length % 3)) % 3;
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stringArray = zeroPad(stringArray.length + paddingCount, stringArray);
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for (int i = 0; i < stringArray.length; i += 3) {
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int j = ((stringArray[i] & 0xff) << 16) +
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((stringArray[i + 1] & 0xff) << 8) +
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(stringArray[i + 2] & 0xff);
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encoded = encoded + base64code.charAt((j >> 18) & 0x3f) +
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base64code.charAt((j >> 12) & 0x3f) +
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base64code.charAt((j >> 6) & 0x3f) +
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base64code.charAt(j & 0x3f);
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}
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return splitLines(encoded.substring(0, encoded.length() -
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paddingCount) + "==".substring(0, paddingCount));
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}
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public static String splitLines(String string) {
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String lines = "";
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for (int i = 0; i < string.length(); i += splitLinesAt) {
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lines += string.substring(i, Math.min(string.length(), i + splitLinesAt));
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lines += "\r\n";
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}
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return lines;
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}
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} |