@valid和自定义异常 问题的产生: 当有很多参数需要校验时,比如name,age,email等很多参数都需要判空,或者有长度限制时,如果后端写很多if-else就有很多代码,不美观,不优雅.前端每个参数都效验的话工作量也很大 本文旨在解决这个问题,本文使用@valid 注解来解决这个问题. 首先定义一个 统一结果返回 import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @…

关于javax.validation.Validator校验的使用 对于要校验的实体类:其需要校验的字段上需要添加注解 实际例子 使用:首先要拿到 validator的子类 Validator validator = Validation.buildDefaultValidatorFactory().getValidator(); 其中方法可以参考 API对实体类的校验 Set<ConstraintViolation<Object>> set = validator.validat…

转自: https://blog.csdn.net/cp026la/article/details/86495659 扯淡: 刚开始写代码的时候对参数的校验要么不做.要么写很多类似 if( xx == null){ - }的语句,总想参数校验可以交给前端处理(很机智),服务端对参数的校验同样重要. 参数校验: springboot需要引入spring-boot-starter-validation(使用Hibernate Validator 框架提供验证功能) 依赖进行参数校验,由于本项目中已经…

刚入手的MacBook想着学点东西,本汪还是决定玩玩CentOS服务器,安装好了VirtualBox + CentOS. 打开一看,懵逼了!命令行! 行吧,先装个图形界面: $sudo yum groupinstall "GNOME Desktop" "Graphical Administration Tools" 哒哒哒- 命令一敲,来事儿了 Cannot find a valid baseurl for repo: base/7/x86_6 连不上网啊,大爷!找…

我的maven 项目有一个红色感叹号, 而且Problems 存在 errors : Description Resource Path Location Type Archive for required library: 'D:/mvn/repos/junit/junit/3.8.1/junit-3.8.1.jar' in project 'xxx' cannot be read or is not a valid ZIP file ktb-mgr Maven Webapp Build pa…

题目链接:Valid Sudoku | LeetCode OJ Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note:…

*无法联网的明显表现会有: 1.yum install出现 Error: cannot find a valid baseurl or repo:base 2.ping host会提示unknown host 方法一. 1.打开 vi /etc/sysconfig/network-scripts/ifcfg-eth0(每个机子都可能不一样,但格式会是"ifcfg-eth数字"),把ONBOOT=no,改为ONBOOT=yes 2.重启网络:service network restart…

Given a sequence of words, check whether it forms a valid word square. A sequence of words forms a valid word square if the kth row and column read the exact same string, where 0 ≤k < max(numRows, numColumns). Note: The number of words given is at le…

Given a non-empty string s and an abbreviation abbr, return whether the string matches with the given abbreviation. A string such as "word" contains only the following valid abbreviations: ["word", "1ord", "w1rd", &…

Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to check whether these edges make up a valid tree. For example: Given n = 5 and edges = [[0, 1], [0, 2], [0, 3], [1, 4]], return tru…