java使用split切割字符串的时候，注意转义字符

今天在做项目的时候发现一个奇怪的问题

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();

运行的结果

发现每一个字符都给我切割了，后来在网上查到，当以  |  切割的时候一定要注意使用转义字符

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~