IMAP文件夹名称编码和解码方法代码,Java代码库,德仔网

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【Java】 IMAP文件夹名称编码和解码方法

作者:Dezai.CN / 发布于2013/10/22/ 432


	// 编码
	public class ImapFolderEncoder {
	 public static String encode(String folder) {
	 String rtn = "", base64;
	 int index = 0;
	 Pattern regAsis = Pattern.compile("\\G(?:[\\x20-\\x25\\x27-\\x7e])+");
	 Pattern reg26 = Pattern.compile("\\G&");
	 Pattern regEncode = Pattern.compile("\\G(?:[^\\x20-\\x7e])+");
	 Pattern regEq = Pattern.compile("=+$");
	 Pattern regSlash = Pattern.compile("\\/");
	 while (index < folder.length()) {
	 Matcher m;
	 m = regAsis.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 rtn = rtn + m.group();
	 continue;
	 }
	 m = reg26.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 rtn = rtn + "&-";
	 continue;
	 }
	 m = regEncode.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 base64 = SimpleUtil.encodeBase64Content(m.group(), "UTF-16BE");
	 base64 = base64.replaceAll(regEq.pattern(), "");
	 base64 = base64.replaceAll(regSlash.pattern(), ",");
	 rtn = rtn + "&" + base64 + "-";
	 continue;
	 }
	 }
	 return rtn;
	 }
	
	}

	// 解码
	public class ImapFolderDecoder {
	 public static String decode(String folder) {
	 String rtn = "", base64;
	 int index = 0;
	 Pattern regAsis = Pattern.compile("\\G([^&]+)");
	 Pattern reg26 = Pattern.compile("\\G\\&-");
	 Pattern regDecode = Pattern.compile("\\G\\&([A-Za-z0-9+,]+)-?");
	 Pattern regComma = Pattern.compile(",");
	 while (index < folder.length()) {
	 Matcher m;
	 m = regAsis.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 rtn = rtn + m.group();
	 continue;
	 }
	 m = reg26.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 rtn = rtn + "&";
	 continue;
	 }
	 m = regDecode.matcher(folder);
	 if (m.find(index)) {
	 index = index + (m.end() - m.start());
	 base64 = m.group().substring(1, m.group().length() - 1);
	 base64 = base64.replaceAll(regComma.pattern(), "/");
	 int mod = base64.length() % 4;
	 int count = 4 - mod;
	 while (count > 0) {
	 base64 += "=";
	 count--;
	 }
	 base64 = SimpleUtil.base64Decode(base64, "UTF-16BE");
	 rtn = rtn + base64;
	 continue;
	 }
	 }
	 return rtn;
	 }
	}

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　IMAP　

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