Programmer Group

1. C3P0 database connection pool Information: link: https://pan.baidu.com/s/19jWfIQ_OlZ29pPPnxNm5og Extraction code: hgha 1.1 concept In fact, it is a container (Collection) for storing database connections.After the system is initialized, the container is created, and some connection objects will be applied in the container. When the user a ...

Chapter I Stream flow 1.1 INTRODUCTION (1) Multi step traversal code of traditional collection Almost all collections (such as Collection interface or Map interface) support direct or indirect traversal operations. When we need to operate on the elements in the Collection, in addition to the necessary addition, deletion and acquisitio ...

preface I've been blogging for some time. Most of the previous articles are about what to use in work and what to write. They have no purpose. Recently, I've been thinking about filling in the pits left during learning, such as java reflection and dynamic agent. I only remember when I was learning. The teacher said that this was the key point ...

There was a wave of simulated interview at station b on Saturday. Three college students were a little disappointed Because I think they are all back-end developers, and I'm android developers. I'm not familiar with spring and I'm afraid of making a fool of myself, so I've been mending spring knowledge all day on Saturday As a result, no one ...

Source Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Example Given 1->2->3->3->4->4->5, return 1->2->5. Given 1->1->1->2->3, return 2->3. Problem solution The previous topic is to retain one of the duplicate value nodes. D ...

preface Tip: Here you can add the general contents to be recorded in this article: For example, with the continuous development of artificial intelligence, machine learning technology is becoming more and more important. Many people have started learning machine learning. This paper introduces the basic content of machine learning. Ti ...

1. Principle 1.1pom.xml Spring boot dependencies: the core dependencies are in the parent projectWhen we write or introduce some Springboot dependencies, we don't need to specify the version because there is a version repository 1.2 starter <dependency> <groupId>org.springframework.boot</groupId> <artifactId> ...

Crazy God video address https://www.bilibili.com/video/BV1WE411d7Dv?p=3 1,Spring 1-1. Introduction to spring Spring: Spring -------- -- > brings spring to the software industry! In 2002, the prototype of Spring framework: interface21 framework was launched for the first time! Spring framework is based on interface21 framework. ...

1,SpringMVC SSM: mybatis + Spring + spring MVC MVC three-tier architecture JavaSE: study hard, teachers lead, and get started quickly JavaWeb: study hard, teachers lead, and get started quickly SSM framework: study official documents, exercise self-study ability, exercise note taking ability and exercise project ability SpringMVC+Vue+Sprin ...

catalogue 1, Scene 2, Implementation of scheme 1. "General" scheme 2. "Optimized" processing scheme 3. Final plan 3, Complete code 1, Scene We know that there are usually a lot of content on the list page, and each content may be very long. If each content is displayed, the user experience is very bad. Therefore, ou ...