获取全局id

package com.itheima.common;

public class BaseContext {
    //session存储的id值无法在过滤器中获取到,要用ThreadLocal一次线程中都能获取
    private static final ThreadLocal<Long> threadLocalId =new ThreadLocal<Long>();
    public static void setThreadLocalId(Long id){
        threadLocalId.set(id);
    }

    public static Long getThreadLocalId() {

        Long aLong = threadLocalId.get();
        return aLong;
    }
}