用正則處理字符串

//替換 String treeCode="FFD-001-002-003"; String s = treeCode.replaceAll("-[^-]+$", ""); //提取 // 按指定模式在字符串查找 String line = "This order was QT3000 placed for QT3000! OK?"; String pattern = "QT\\d+"; // 創建 Pattern 對象 Pattern r = Pattern.compile(pattern); Matcher m = r.matcher(line); while (m.find()) { System.out.println("Found value: " + m.group(0)); }