Interview questions - continuous update of spring FAQ and source code analysis

IOC bean Implementation process and life cycle of Write a first dome https://img blog.csdnimg.cn/ccb38e47e6d04226902baa80735b8afd.png https://img blog.csdnimg.cn/93fa3794fb904bc78e8916038995a3ed.png catBean object // / / Function description :be...

2022-05-14 | SteveCode. | 338浏览

Android as - processing of obtaining read and write permissions for different targetsdk versions

Android as As the title , Trying to use only native Android as When the compiler implements the voice recording function , It's directly used when it was packed to unity jar The code of the package , And then I found the package app Unable to real...

2022-05-14 | Chun Jie | 836浏览

Java project: campus second-hand trading platform (java + SSM + thymeleaf + HTML + jQuery + MySQL)

The source code for : Blog's front page ' resources ' Download Project introduction This is a second-hand trading platform on campus (C2C),C2C E-commerce between individuals , Buyers can view all products released by sellers , And filter the ...

2022-05-14 | pastclouds | 506浏览

Java project: food forum system (java + SSM + jsp + jQuery + layui + MySQL)

The source code for : Blog's front page ' resources ' Download Project introduction The project is mainly divided into foreground and background ; The main functions of the front desk include : Sign in 、 register ; home page 、 My post 、 Sug...

2022-05-14 | pastclouds | 273浏览

[Linux] explanation of basic operation instructions

brief introduction :         Linux The directory structure and file organization form of the operating system are organized in the form of multi fork tree . Why? ? It's not just Linux , Many mainstream operating systems are multi tree structures ....

2022-05-14 | Fleeting years and mysterious moon | 449浏览

redis 线程模型简析

1. Reactor模型 单Reactor模型 https://img blog.csdnimg.cn/7114d90c889046b689046ca39d3fba15.png 单线程 Reactor,工作者线程池 https://img blog.csdnimg.cn/c1c7aaa7ebbb464db373cf2365626608.png 多 Reactor 线程模式 https://img blog.csdnimg.cn/83b09f8749504fb692a20dc4fe91da22....

2022-05-14 | caicongyang | 823浏览

Java 核心技术(第八版)卷1:基础知识:例13-3P576TreeSetTest

//本程序创建了两个item 对象的树集, // 第一个按照部件编号排序,这是item对象的默认排序顺序, // 第二个使用一个定制的比较器来按照描述信息排序  import java.util./ ; //本程序创建了两个item 对象的树集,第一个按照部件编号排序,这是item对象的默认排序顺序, // 第二个使用一个定制的比较器来按照描述信息排序 public class TreeSetTest { public static void main String args { SortedS...

2022-05-14 | superfreak | 904浏览

Java 核心技术(第八版)卷1:基础知识:例13-2P572SetTest

这个程序用来讲解散列集合,运行的时候程序将读取输入的所有单词,并且将他们添加道散列集中。然后遍历散列集中的不同单词。最后打印出单词的数量。 我实际运行这个程序的时候是出错了,不知道为什么,个人感觉这个程序也不太好,感觉作者有点敷衍的感觉呢。 import java.util./ ; //本程序使用一个set 来打印 来自于System.in 的文本中所有的 唯一的单词 public class SetTest { public static void main String args { Set...

2022-05-14 | superfreak | 898浏览

Java 核心技术(第八版)卷1:基础知识:例13-2P567LinkedListTest

import java.util./ ; //本程序演示了 链表的基础操作 public class LinkedListTest { public static void main String args { List String first list=new LinkedList String ; first list.add 'Amy' ; first list.add 'Carl' ; first list.add 'Erica' ; System.out.println 'Origi...

2022-05-14 | superfreak | 434浏览

MySQL v8.0.29 for Windows 关系型数据库管理系统精简便携版

前言 MySQL是一个关系型数据库管理系统,由瑞典MySQL AB 公司开发,目前属于 Oracle 旗下产品。MySQL 是最流行的关系型数据库管理系统之一,在 WEB 应用方面,MySQL是最好的 RDBMS应用软件。 MySQL 关系数据库将数据保存在不同的表中,而不是将所有数据放在一个大仓库内,这样就增加了速度并提高了灵活性。MySQL所使用的 SQL 语言是用于访问数据库的最常用标准化语言。 由于其体积小、速度快、总体拥有成本低,尤其是开放源码这一特点,一般中小型网站的开发都选择 M...

2022-05-14 | 由久 | 203浏览

Redis 学习笔记(五)-- Redis工具类

原文连接: 原文连接 46089066/article/details/110946131 对 RedisTemplate 的方法进行封装成工具类 package com.hui.utils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.st...

2022-05-14 | 稻草人0.0 | 239浏览

Redis 学习笔记(四)-- SpringBoot集成Redis

SpringBoot 操作数据: Spring Data 也是与之齐名的项目。 说明:在 springboot 2.X 之后,原来使用的 Jedis 被替换成了 lettuce Jedis: 采用直连,多个线程操作的话是不安全的;如果要避免不安全的,使用 Jedis pool 连接池 更像 BIO 模式。 lettuce: 采用 netty,实例可以在多个线程中共享 不存在不安全的情况,可以减少线程数据 更像 NIO 模式。 源码: public class RedisAutoConfigura...

2022-05-14 | 稻草人0.0 | 890浏览

Redis 学习笔记(三)-- 事务和Jedis

Redis 事务 Redis 单条命令是保证原子性的,但是 Redis 事务不保证原子性 Redis 事务的本质是一组命令的集合 一个事务中的所有命令都会被序列化,在事务执行过程中,会按照顺序执行 队列 set set set 执行 Redis 事务没有隔离级别的概念 所有的命令在事务中,并没有被直接执行,只有发起执行命令的时候才会被执行 redis 事务: 开启事务 (Multi) 命令入队 (…) 执行事务 (Exec) 正常执行事务 127.0.0.1:6379 multi / 开启事务...

2022-05-14 | 稻草人0.0 | 655浏览

What are the types of zookeeper nodes?

Zookeeper What types of nodes are there ? Take the answer 1: ZooKeeper Server support 7 The two node types are : persistent 、 Persistent order 、 temporary 、 Provisional order 、 Containers 、 persistent TTL、 Persistent order TTL.

2022-05-14 | Alibaba cloud Q & A | 874浏览

What is the core of netty IO service module?

Netty IO What is the core of the service module ? Take the answer 1: 1、Channel Interface 2、EventLoop Interface 3、ChannelFuture Interface 4、ChannelHandler and ChannelPipeline

2022-05-14 | Alibaba cloud Q & A | 327浏览

What are the characteristics of mybatis dynamic SQL implementation methods?

MyBatis Dynamic SQL Characteristics in implementation method ? Take the answer 1: No more builds XML The mapping file , No support required 'by example' Ability , Mass enable MyBatis3 Annotations , Combined with modern coding style , The overall am...

2022-05-14 | Alibaba cloud Q & A | 707浏览

What is the unique skill of fluent mybatis?

Fluent MyBatis What is your unique skill ? Take the answer 1: Support dynamic table name change .

2022-05-14 | Alibaba cloud Q & A | 103浏览

What are the characteristics of fluent mybatis?

Fluent MyBatis What are the characteristics of ? Take the answer 1: Fluent MyBatis The overall mechanism and MyBatis Dynamic SQL Closer to the , Also based on native Provider annotation , Generate... For each table of the user Entity Class and defau...

2022-05-14 | Alibaba cloud Q & A | 645浏览

What are the characteristics of mybatis plus in the implementation method?

MyBatis Plus Characteristics in implementation method ? Take the answer 1: No intrusion : Just enhance and don't change , The introduction of it will not affect the existing project , Silky smooth Low loss : Start up will automatically inject bas...

2022-05-14 | Alibaba cloud Q & A | 216浏览

What are the characteristics of fluent mybatis?

Fluent MyBatis What are the characteristics of ? Take the answer 1: The convenient IDE Grammar tip

2022-05-14 | Alibaba cloud Q & A | 318浏览