我想在我的字符串中找到正則表達(dá)式的實例。但它不起作用。我的正則表達(dá)式似乎不錯。我的字符串是這樣的：LB,32736,0,T,NRJ.POMPES_BACHE.PUISSANCE_ELEC_INST,20190811T080000.000Z,20190811T194400.000ZTR,NRJ.POMPES_BACHE.PUISSANCE_ELEC_INST,0,65535,1,1,,0,0,220190811T080000.000Z,0.00800000037997961,19220190811T080100.000Z,0.008999999612569809,19220190811T080200.000Z,0.008999999612569809,192LB,32734,0,T,NRJ.POMPES_BACHE.PUISSANCE_ELEC_CPT,20190811T080000.000Z,20190811T201200.000ZTR,NRJ.POMPES_BACHE.PUISSANCE_ELEC_CPT,0,65535,1,1,,0,0,220190811T080000.000Z,0.6743068099021912,19220190811T080100.000Z,0.6744459867477417,19220190811T080200.000Z,0.6745882630348206,19220190811T080300.000Z,0.6747232675552368,19220190811T080400.000Z,0.6748600006103516,19220190811T080500.000Z,0.6749916672706604,19220190811T080600.000Z,0.6751362681388855,192我只想匹配具有這種格式的行20190811T080000.000Z,0.00800000037997961,192所以我試過這個正則表達(dá)式^([^,]*,){2}[^,]*$并在此網(wǎng)站上工作：https ://regex101.com/r/iIbpgB/3但是，當(dāng)我在 Java 上實現(xiàn)它時，它不起作用。Pattern pattern = Pattern.compile("^([^,]*,){2}[^,]*$");                Matcher matcher = pattern.matcher(content);                if ( matcher.find()){                    System.out.println(matcher.group());                }您可以在這里驗證：https://www.codiva.io/p/e83bcde1-8528-4330-94a2-58fe80afffc0有人有解釋嗎？..謝謝