The use of reverse engineering in Mybatis Generator

​​ 1, About MyBatis Generator MyBatis Generator (MBG) is the code generator of MyBatis and iBATIS. It will generate code for all versions of MyBatis and versions of iBATIS after 2.2.0. It reviews database tables (or many tables) and generates artifacts that can be used to access tables. This reduces the initial hassle of setting up objects an ...

Added by Doyley on Fri, 19 Jun 2020 06:20:27 +0300

Data structure Java05 [overview of binary tree, binary tree traversal, heap sorting, implementation and traversal of clue binary tree]

Catalogue P34-4.7 overview of binary tree with sequential storage P35-4.8 traversal of binary tree stored in sequence P36-4.9 heap sorting of common sorting algorithms P37-4.10 overview of cue binary tree P38-4.11 implementation of cue binary tree code 1,TestThreadedBinaryTree.java 2,ThreadedB ...

Added by logicsound on Thu, 18 Jun 2020 12:46:12 +0300

If BigDecimal is not used properly, the boss's loss will still be deducted from your salary

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! We have basically formed a common sense that we need to use BigDecimal instead of others where money is needed, and we all know that floating-point variables will lose precisio ...

Added by keiran420 on Thu, 18 Jun 2020 11:53:31 +0300

Android first program analysis

catalog 1. Understand the file structure of Android studio 2. Create registration function program 2.1 layout in layout file 2.2 write MainActivity class code 2.3 compile and generate APK file 3. Cracking program This tutorial is from "Android Software Security and reverse analysis" ...

Added by sunnyside on Thu, 18 Jun 2020 10:54:19 +0300

DQL data query language 2

DQL data query language multi-table query Cartesian set Equivalence / connection query join query join link Common functions Subquery Paging query multi-table query Cartesian set Generation conditions: Omit connection conditions Invalid connection condition All rows in all tables are connec ...

Added by nocniagenti on Thu, 18 Jun 2020 08:26:10 +0300

Redis deep adventure application

Article catalog install Infrastructure string set Quotation marks Options lock obtain release exists expire System clock Various key operations Expiration algorithm colony list quicklist rpush rpop lpop lpush lindex lrange ltrim llen blpop brpop hash set zset zrange zrevrange zcard Curren ...

Added by ralba1998 on Thu, 18 Jun 2020 06:11:24 +0300

How to Design High Performance Distributed Locks

What is a distributed lock? In a JVM, where multiple threads are concurrent, we can use synchronous or Lock locks to ensure that only one thread can modify shared variables or execute code blocks at a time.However, our services are deployed on a distributed cluster basis, and for some shared resources, the use of Java locks in a distributed en ...

Added by gersh on Wed, 17 Jun 2020 19:51:19 +0300

Spring initializes Ioc I

Spring IOC source code parsing based on annotations, version 5.1.x Initializing bean s through the Spring context Annotation class, annotationconfigpplicationcontext can be used to load Spring context based on java configuration class (various annotations), which is better than using application.xm ...

Added by nosmasu on Wed, 17 Jun 2020 07:06:03 +0300

New feature of JDK8: date time related API

New feature of JDK8: date time related API Problems with old version date time API: 1. Poor design: in java.tilogjava Sq| has date classes in its packages, java.util.Date Contains both date and time, and java.sql.Date Only. Contains the date. In addition, the classes used for formatting and pars ...

Added by Iceman18 on Wed, 17 Jun 2020 07:06:02 +0300

Three characteristics of java object-oriented: encapsulation, inheritance and polymorphism

Three characteristics of object-oriented encapsulation 1. The concept of encapsulation is to make the program * * highly cohesive and low coupling** High cohesion: it means that the internal data operation details of the class are completed by itself, and external interference is not allowed Low co ...

Added by wildmanmatt on Tue, 16 Jun 2020 11:37:44 +0300