Java实现Javascript中的unescape

public static String unescape(String src) { StringBuffer tmp = new StringBuffer(); tmp.ensureCapacity(src.length()); int lastPos = 0, pos = 0; char ch; while (lastPos < src.length()) { pos = src.indexOf("%", lastPos); if (pos == lastPos) { if (src.charAt(pos + 1) == 'u') { ch = (char) Integer.parseInt(src.substring(pos + 2, pos + 6), 16); tmp.append(ch); lastPos = pos + 6; } else { ch = (char) Integer.parseInt(src.substring(pos + 1, pos + 3), 16); tmp.append(ch); lastPos = pos + 3; } } else { if (pos == -1) { tmp.append(src.substring(lastPos)); lastPos = src.length(); } else { tmp.append(src.substring(lastPos, pos)); lastPos = pos; } } } return tmp.toString(); }