Java shangsilicon Valley data structure and algorithm learning record

Stack implementation synthesis calculator (infix expression) Thought analysis: We need two stacks: number stack and symbol stack to define an index index index index to traverse the expression Traverse to a number, then enter the number stack Traverse to a symbol. If the symbol stack is empty, it wil ...

Added by cags on Sun, 21 Jun 2020 08:37:34 +0300

Details of Spring Boot configuration file

Details of Spring Boot configuration file Spring Boot provides two commonly used configuration files, properties file and yml file. Their role is to modify the default value of Spring Boot auto configuration. Compared with the properties file, the yml file is younger and has many pits. yml determines the hierarchical relationship through space ...

Added by The_Black_Knight on Sun, 21 Jun 2020 08:20:11 +0300

The first experience of flink streaming sql

Article catalog background Example explanation Construct the StreamTableEnvironment object Register table Using Tuple Using Row Pojo class using java Use external storage background sql,Structured Query Language: as a general and popular query language, Structured Query Language is becomin ...

Added by TodManPlaa on Sun, 21 Jun 2020 07:16:31 +0300

[1] Sparse arrays and queues

1, Linear structure and nonlinear structure 1. Linear structure 2. Nonlinear structure 2, Sparse arrays and queues 1. Sparse array (1) First look at a real demand (2) . basic introduction (3) . application examples 2. Queue (input element head pointer front unchanged, tail pointer rear+1; out ...

Added by ThEMakeR on Sat, 20 Jun 2020 06:51:02 +0300

Mock test using Moco framework

Moco framework: an open source project above github, which can simulate http, https and other protocols. github website: moco source code 1. Start the simulation server Download Moco_ URL of jar package: Moco jar package download Command to start the impersonation server: java -jar ./moco-runner-0.11. ...

Added by kavisiegel on Fri, 19 Jun 2020 07:39:04 +0300

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