一面（9.3）   完全是kpi面，应该是hrjian'dan'w          网络：                      https的流程                         为什么三次握手，四次挥手                         xss攻击和sql注入攻击（没答上）                        JVM：                      堆和栈，存的是什么，有什么区别                        MySQL                      红黑树和B+树的区别，应用场景                         B和B+树的区别                         什么是脏读幻读                         有什么引擎                         怎么判断锁生效（不知道）                        Redis                      哪些数据类型                         过期有几种机制                        多线程                      线程池创建的方式                         为什么用线程池                        Java基础                      接口的抽象类的区别，应用场景                         反射的优缺点和应用场景                        集合                      HashMap底层                        框架                      SpringAOP的切入点是什么