摘要：
示例： 1、Employee类 public class Employee { private String userId; private List<Employee> employeeList; public Employee(String userId) { super(); this.use 阅读全文
摘要：
Java 异常java.lang.IllegalArgumentException: Illegal group reference当字符串方法replaceAll()中替换字符含有特殊字符$如， String test = “abcfdgfdg”;test = test.replaceAll(“a 阅读全文