java使用split切割字符串的時候，注意轉義字符

今天在做項目的時候發現一個奇怪的問題

File file = new File("d:\\a.txt");
        BufferedReader br = new BufferedReader(new FileReader(file));

        String text = "";
        while ((text = br.readLine()) != null) {

            String[] s = text.split("|");
            for (int i = 0; i < s.length; i++) {
                System.out.print("切割字符串" + s[i] + "\t");
            }
            System.out.println();
        }
        br.close();

運行的結果

發現每一個字符都給我切割了，后來在網上查到，當以  |  切割的時候一定要注意使用轉義字符

File file = new File("d:\\a.txt");
        BufferedReader br = new BufferedReader(new FileReader(file));

        String text = "";
        while ((text = br.readLine()) != null) {

            String[] s = text.split("\\|");
            for (int i = 0; i < s.length; i++) {
                System.out.print("切割字符串" + s[i] + "\t");
            }
            System.out.println();
        }
        br.close();

搞定收工~