javaFX的WebView提取文本后使用正则匹配失败，而用同样字符串却能匹配成功，为什么？

Question

奇怪的很，从WebView提取出文本后去用正则式匹配失败，而且明明要匹配的字符串里面有，而且单独用字符串直接匹配实验又是可以的。究竟什么鬼？

webEngine.getLoadWorker().stateProperty()
.addListener(new ChangeListener() {
@Override
public void changed(ObservableValue<? extends Worker.State> ov,
Worker.State oldState, Worker.State newState) {

                    if (newState == Worker.State.SUCCEEDED) {
                        String docContent = webEngine.getDocument().getDocumentElement().getTextContent();

                        //Pattern patternUK = Pattern.compile("英\\s*\\[[^\\]]+\\]");
                        //Matcher matcherUK = patternUK.matcher("aaaa美 [wɜː(r)d]bbbb[]aaaa英 [wɜː(r)d]");
                        Pattern patternUS = Pattern.compile("美\\s*\\[[^\\]]+\\]");
                        Matcher matcherUS = patternUS.matcher(docContent);

                        if (matcherUS.find()) {
                            System.out.println(docContent);
                            System.out.println("Found value: " + matcherUS.group(0));
                            info.setText("Found value: " + matcherUS.group(0));
                        } else {
                            System.out.println("NO MATCH");
                            info.setText("NO MATCH");
                        }

                        textArea.setText(docContent);
                    }
                }

            });

Answer 1

https://zhidao.baidu.com/question/324848862.html