\n| import java.io.UnsupportedEncodingException; <\/p>\n public class Base64Utils
\n{
\n private static char[] base64EncodeChars = new char[]
\n { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
\n 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
\n 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
\n '6', '7', '8', '9', '+', '\/' };
\n private static byte[] base64DecodeChars = new byte[]
\n { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
\n -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53,
\n 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
\n 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29,
\n 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1,
\n -1, -1, -1 };
\n
\n \/**
\n * \u52a0\u5bc6
\n *
\n * @param data
\n * @return
\n *\/
\n public static String encode(byte[] data)
\n {
\n StringBuffer sb = new StringBuffer();
\n int len = data.length;
\n int i = 0;
\n int b1, b2, b3;
\n while (i < len)
\n {
\n b1 = data[i++] & 0xff;
\n if (i == len)
\n {
\n sb.append(base64EncodeChars[b1 >>> 2]);
\n sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
\n sb.append(\"==\");
\n break;
\n }
\n b2 = data[i++] & 0xff;
\n if (i == len)
\n {
\n sb.append(base64EncodeChars[b1 >>> 2]);
\n sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
\n sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
\n sb.append(\"=\");
\n break;
\n }
\n b3 = data[i++] & 0xff;
\n sb.append(base64EncodeChars[b1 >>> 2]);
\n sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
\n sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
\n sb.append(base64EncodeChars[b3 & 0x3f]);
\n }
\n return sb.toString();
\n }
\n
\n \/**
\n * \u89e3\u5bc6
\n *
\n * @param str
\n * @return
\n *\/
\n public static byte[] decode(String str)
\n {
\n try
\n {
\n return decodePrivate(str);
\n } catch (UnsupportedEncodingException e)
\n {
\n e.printStackTrace();
\n }
\n return new byte[]
\n {};
\n }
\n
\n private static byte[] decodePrivate(String str) throws UnsupportedEncodingException
\n {
\n StringBuffer sb = new StringBuffer();
\n byte[] data = null;
\n data = str.getBytes(\"US-ASCII\");
\n int len = data.length;
\n int i = 0;
\n int b1, b2, b3, b4;
\n while (i < len)
\n {
\n
\n do
\n {
\n b1 = base64DecodeChars[data[i++]];
\n } while (i < len && b1 == -1);
\n if (b1 == -1)
\n break;
\n
\n do
\n {
\n b2 = base64DecodeChars[data[i++]];
\n } while (i < len && b2 == -1);
\n if (b2 == -1)
\n break;
\n sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));
\n
\n do
\n {
\n b3 = data[i++];
\n if (b3 == 61)
\n return sb.toString().getBytes(\"iso8859-1\");
\n b3 = base64DecodeChars[b3];
\n } while (i < len && b3 == -1);
\n if (b3 == -1)
\n break;
\n sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));
\n
\n do
\n {
\n b4 = data[i++];
\n if (b4 == 61)
\n return sb.toString().getBytes(\"iso8859-1\");
\n b4 = base64DecodeChars[b4];
\n } while (i < len && b4 == -1);
\n if (b4 == -1)
\n break;
\n sb.append((char) (((b3 & 0x03) << 6) | b4));
\n }
\n return sb.toString().getBytes(\"iso8859-1\");
\n }
\n
\n} \n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ...<\/p>\n","protected":false},"excerpt":{"rendered":" \u4ee3\u7801\u6765\u6e90\u4e8e\u7f51\u7edc<\/p>\n import java.io.UnsupportedEncodingException;
\n\/**
\n * @date 2014\u5e748\u670822\u65e5 \u4e0b\u53489:50:28
\n *\/
\npublic class Base64Utils
\n{
\n private static char[] base64EncodeChars = new char[]
\n { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
\n 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
\n 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', ' \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[90],"class_list":["post-508","post","type-post","status-publish","format-standard","hentry","category-java","tag-base64"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/comments?post=508"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/508\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |