Programmer Group

1, What is network? In the computer field, the network is a virtual platform for information transmission, reception and sharing. Through it, all points, surfaces and bodies are connected together, so as to realize the sharing of these resources. Function: information transmission and resource sharing A little: resource sharing is free 2 ...

Start with a picture and write the rest introduction Design pattern collection: http://aphysia.cn/categories/designpattern If you have used Mybatis, I believe you are familiar with the following code. First create a builder object, and then call the. build() function: InputStream is = Resources.getResourceAsStream("mybatis.xml"); Sql ...

catalogue Type 1.1 1.1.1 definition of class 1.2 object         1.2.1 creating objects             1.2.2 instantiated object                  1.2.3 creating multiple objects           ...

1, Mybatis annotation development single table operation 1.1 common notes of mybatis In recent years, annotation development has become more and more popular. Mybatis can also use annotation development, so that we can reduce the writing of Mapper Mapping file. We first learn about some basic CRUD, and then learn about complex mapping ...

Database advanced After learning database related knowledge, please be sure to see the precautions. Precautions for database statements: https://blog.csdn.net/qq_43098690/article/details/121661835 1, Database integrity As the name suggests, the data stored in the database must be valid, that is, validity and accuracy. Ensure data int ...

Introduction         As we all know, the server and client of Minecraft are separated. The client and the server communicate with each other through TCP / IP (especially Java version and UDP version) (so we need to configure the port property of server.properties on the server and the input required for client connection & ...

Thread pool: common problems of business code In the program, we will use various pool optimization caches to create expensive objects, such as thread pool, connection pool and memory pool. Generally, some objects are created in advance and put into the pool. When they are used, they are directly taken out for use and returned for reuse. The n ...

1. What is network? In the field of computer, network is a virtual platform for information transmission, reception and sharing. Through it, all points, faces and bodies are linked together So as to realize the sharing of these resources Function: information transmission and resource sharing Advantages: sharing resources is free 2 ...

1. Feign applications Objective: The role of Feign; Using Feign to invoke services in consumer-demo code Analysis: Import starter dependency;Turn on Feign function;Write Feign client;Write a processor ConsumerFeignController, inject Feign client and use it;test Summary: Feign's primary role: Splicing http request addresses automatically ba ...

One sentence a day There is only one kind of heroism in the world, that is, to love life after recognizing the truth of life catalogue 1. Data structure 2. Linearity table 3. Sequence table Create classes and member properties and member methods create object 1. Print sequence table:   public void display() 2. Number of retur ...