Aaron

摘要： Q: 如何通过Jackson反序列化复杂类型Collection 例 ArrayList<MyObject> HashMap<String,MyObject> A: 将JSON String与Object之间的转换只要使用ObjectMapper对象的readValue和writeValueAsSt 阅读全文

摘要： 名词解释 SpEL（Spring Expression Language），即Spring表达式语言，能在运行时构建复杂表达式、存取对象属性、对象方法调用等等，并且能与Spring功能完美整合，如能用来配置Bean定义。 实现原理 创建解析器：SpEL使用ExpressionParser接口表示解析 阅读全文

摘要： 994. Rotting Oranges You are given an m x n grid where each cell can have one of three values: 0 representing an empty cell, 1 representing a fresh or 阅读全文

摘要： 417. Pacific Atlantic Water Flow There is an m x n rectangular island that borders both the Pacific Ocean and Atlantic Ocean. The Pacific Ocean touche 阅读全文

摘要： 133. Clone Graph Given a reference of a node in a connected undirected graph. Return a deep copy (clone) of the graph. Each node in the graph contains 阅读全文

摘要： 200. Number of Islands Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. An isl 阅读全文

摘要： 基础概念 名词解释 OAth2 Spring Cloud Gateway：Spring Cloud Gateway是基于Spring Boot 2.x，Spring WebFlux和Project Reactor构建的。 Spring Security：Spring Security是一个提供身份验 阅读全文

摘要： 79. Word Search Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from le 阅读全文

摘要： 39. Combination Sum Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates 阅读全文

摘要： 295. Find Median from Data Stream The median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value 阅读全文