这是相对简单的情况
appendReplacement：
// Prepare map of replacementsMap<String,String> replacement = new HashMap<>();replacement.put("bla", "hello,");replacement.put("red", "world!");// Use a pattern that matches three non-@s between two @sPattern p = Pattern.compile("@([^@]{3})@");Matcher m = p.matcher("@bla@This is a @red@line @bla@of text");StringBuffer sb = new StringBuffer();while (m.find()) { // Group 1 captures what's between the @s String tag = m.group(1); String repString = replacement.get(tag); if (repString == null) { System.err.println("Tag @"+tag+"@ is unexpected."); continue; } // Replacement could have special characters, e.g. '' // Matcher.quoteReplacement() will deal with them correctly: m.appendReplacement(sb, Matcher.quoteReplacement(repString));}m.appendTail(sb);String result = sb.toString();演示
