竖线

将zhansan|lisi|wangwu|zhaoliu中的竖线换成逗号

String test = "zhansan|lisi|wangwu|zhaoliu";
// 这注意需要 \\|
String all = test.replaceAll("\\|", ",");
System.out.println(all);

竖线有特殊含义，需要加转义