♦ [JavaSE basic syntax] Explore classes and objects (encapsulation, etc.)! block
1. Packaging 1.1 concept of packaging As an object-oriented language, java has three basic characteristics: encapsulation, inheritance and polymorphism. In the second article on classes and objects, I'll talk about encapsulation. This is also the most direct embodiment of the concept of class UTF-8...
Posted by jasonc on Tue, 05 Oct 2021 23:35:39 +0530
Some knowledge of JDBC and its optimized use
catalogue BLOB type Insert big data type into data table Modify Blob type field in data table Read big data type from data table Batch insert Batch execution of SQL statements Efficient batch insertion Database transaction introduce JDBC transaction processing ACID property of the transaction CUTF-8...
Posted by Chiaki on Sat, 09 Oct 2021 14:07:08 +0530
tomcat+jsp IDEA online face recognition search system based on openCV
You can also call the soft court to find people. Ha ha (unfinished) J2EE operation of a project The first thing to do 1. Download openCV connect: https://pan.baidu.com/s/1eyzqcjnw17s_LpDXVmt-rA Extraction code: tqn1 2. Prepare the IDEA web project, and the server is Tomcat (in fact, others are UTF-8...
Posted by ExpertAlmost on Sat, 23 Oct 2021 12:20:32 +0530
java serialization and deserialization tool class implementation (including explanation and precautions)
Hello, in this issue, I'll explain the complete implementation process of serialization and deserialization, and solve various exception problems encountered by you, such as FileNotFoundException, java.io.EOFException, etc Basic implementation steps: 1. Create a file object (File) and judge whUTF-8...
Posted by SithLordKyle on Mon, 25 Oct 2021 07:41:54 +0530
Employee class is the parent class, which is inherited by managers and ordinary workers. Design attribute: name, length of service, method: calculate salary getSalary().
Topic introduction Employee class is the parent class, which is inherited by managers and ordinary workers. Design attribute: name, length of service, method: calculate salary getSalary(). Basic salary of employees = 3000 + length of service * 20; Manager's salary = basic salary + Manager's alUTF-8...
Posted by dewen on Fri, 29 Oct 2021 07:59:04 +0530
Introduction to PlantUML drawing software
In my daily work, I often encounter the need to draw sequence diagram and flow chart. When the requirements are not high, we can choose tools such as ProcessOn and Xmind to draw, but sometimes it may be more efficient to draw with code. After all, there is nothing more familiar with code than pUTF-8...
Posted by supposedlysupposed on Fri, 29 Oct 2021 22:37:25 +0530
Front and back end separation project - back end interface entry notes
Note: this document is a front-end and back-end separation project - back-end development (entry-level) document for reference only Project Name: myBlog Environment: Tools / IDEA | JDK/1.8 1, Create project 1. New maven project Click file new project Maven to create a new Maven project After clUTF-8...
Posted by kiju111 on Mon, 01 Nov 2021 16:56:28 +0530
Fastjson source code analysis -- the role and implementation of ASM
2021SC@SDUSC The previous article introduced the format of Java bytecode file, the definition of ASM and how to turn ASM on / off in Fastjson. This article introduces the specific implementation of ASM in Fastjson. View in IDEA Download the ASM Bytecode Outline plug-in in the IDEA After downloaUTF-8...
Posted by Clarkeez on Wed, 03 Nov 2021 08:29:53 +0530
7-java basic object-oriented evaluation questions
7-java basic object-oriented evaluation question (2) choice question Topic 1 (single choice): The following description of private is wrong Options: A: member variables and member methods modified by private can only be used in this class and cannot be accessed directly in other classes B: privUTF-8...
Posted by tzuriel on Tue, 08 Mar 2022 10:03:09 +0530
MyBatis-Plus01_ Overview, initialization project, CRUD in BaseMapper and Service, and common annotations
①. Overview of mybatis plus ①. MyBatis plus (MP for short) is an enhancement tool of MyBatis. On the basis of MyBatis, it only makes enhancement without change, and is born to simplify development and improve efficiency. MyBatis plus provides a general mapper and service, which can quickly reaUTF-8...
Posted by gmartin1215 on Thu, 10 Mar 2022 05:13:44 +0530