representation: adjacency matrix 好处是对边或者权重的queries 都是O(1), remove or add an edge也是O(1). 坏处是对点不友好,增加一个点的操作是O(V^2). 而且本身存储太space consuming,同样是点的平方复杂度。导致在sparse matrix里不适用。 Adjacency Matrix is a 2D ar
启动 springBoot 工程时报错: Caused by: org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'userLogAspect' for bean class [com.foreveross.security.con
项目更新并编译后启动服务器,报一下错误: Invalid bean definition with name 'dataSource' defined in class path resource [spring-mybatis.xml]: Could not resolve placeholder 'initialSize' in string value "${initialSize}";
用Maven搭建spring、springmvc、mybatis时运行报错,搞了好久才搞懂: org.springframework.beans.factory.BeanDefinitionStoreException: Could not resolve bean definition resource pattern [classpath:spring/applicationContext