1 package com.lzkj.csp.bas.util;
2
3 @SuppressWarnings("restriction")
4 public class Base64Utils {
5
6 private final static sun.misc.BASE64Encoder base64Encoder = new sun.misc.BASE64Encoder();
7 private final static sun.misc.BASE64Decoder base64Decoder = new sun.misc.BASE64Decoder();
8
9 /**
10 * Base64-encode the given byte array to a String.
11 *
12 * @param src the original byte array (may be {@code null})
13 * @return the encoded byte array as a UTF-8 String (or {@code null} if the
14 * input was {@code null})
15 */
16 public static String encodeToString(byte[] src) {
17 if (src == null)
18 return null;
19 return base64Encoder.encode(src);
20 }
21
22 /**
23 * Base64-encode the given byte array to a String.
24 *
25 * @param src the original byte array (may be {@code null})
26 * @param followRFC2045 true Encoded lines be no more than 76 characters long
27 * false Encoded lines be more than 76 characters long
28 * @return
29 * @see <a href="https://tools.ietf.org/html/rfc2045"/>
30 * @see <a href="https://en.wikipedia.org/wiki/Base64#MIME"/>
31 * @see <a href="https://en.wikipedia.org/wiki/Request_for_Comments"/>
32 */
33 public static String encodeToString(byte[] src, boolean followRFC2045) {
34 if (src == null)
35 return null;
36 String encode = base64Encoder.encode(src);
37 if (!followRFC2045) {
38 encode = encode.replaceAll(System.getProperty("line.separator"), "");
39 }
40 return encode;
41 }
42
43 /**
44 * Base64-decode the given byte array from an UTF-8 String.
45 *
46 * @param src the encoded UTF-8 String (may be {@code null})
47 * @return the original byte array (or {@code null} if the input was
48 * {@code null})
49 */
50 public static byte[] decodeFromString(String src) {
51 if (src == null)
52 return null;
53 try {
54 byte[] decodeBuffer = base64Decoder.decodeBuffer(src);
55 return decodeBuffer;
56 } catch (Exception e) {
57 throw new RuntimeException("decodeFromString failed.", e);
58 }
59 }
60 }
说明：以上的工具类中加密方法（encodeToString）有两个，一个是普通的base64加遵循RFC2045机密规则，此规则在加密后的符76位自动添加换行符，所以在此工具类中重写了encodeToString（String src ，boolean followRFC2045），true：遵从、false：不遵从
