What is a servlet? The power node servlet tutorial takes you to a quick introduction to actual combat
A component specification (server-side Java application) developed by sun company to expand the functions of web server. It is independent of platform and protocol, and can generate dynamic web pages. It acts as an intermediate layer between client requests (web browsers or other HTTP clients) and server responses (databases or applications on ...
Posted by jkraft10 on Wed, 17 Nov 2021 23:23:57 -0800
Common HTML tags and resume making in Java EE
1, Foreword
1. HTML code is composed of various tags. 2. HTML code infrastructure
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document& ...
Posted by lmninfo on Wed, 17 Nov 2021 20:41:13 -0800
IOC and DI in Spring ("easiest to understand Spring learning")
🏇
wow
Click
Click
:
\textcolor{blue} {wow, Kaka:}
Wow, Kaka:
stay
...
Posted by WDPEjoe on Wed, 17 Nov 2021 15:41:52 -0800
About collections and iterators
About containers (Collection)
1. What is a container
Container is used to hold and manage objects. In life, we will use all kinds of containers. Such as pots and pans, boxes and bags. The "container" in the program also has similar functions to hold and manage data.
2. Structure of container
A single instan ...
Posted by Houdini on Wed, 17 Nov 2021 04:55:37 -0800
Basic operators and exercises of C language
For decimal system, for example, 1234.5 = 1 * 10 ^ 3 + 2 * 10 ^ 2 + 3 * 10 ^ 1 + 4 * 10 ^ 0 + 5 * 10 ^ - 1 (sum by weight expansion).
○ 1 other hexadecimal to decimal systems are summed according to weight expansion, such as hexadecimal 0x123=1*16^2 + 2*16^1 + 3*16^0
○ 2 decimal to other base systems: integer part: Radix division and remainde ...
Posted by rossh on Wed, 17 Nov 2021 03:49:54 -0800
Zero base spring boot day 10
brief introduction
Today we mainly study data verification. When transferring parameters to a RESTful interface, we can't trust any user input, so we need to verify the data during development. For example, we often have to write to judge whether the field is empty, length limit, etc. these codes are cumbersome, lengthy and error prone. Here, ...
Posted by Shaun on Wed, 17 Nov 2021 02:34:50 -0800
An interview question with an annual salary of 500000 looks not difficult, but 99 people are brushed out
Today I want to talk about the problem of circular dependency in spring. Recently, a large number of fans have asked this question, which is often asked in high salary interviews.
On the issue of circular dependence, let's feel the serial gun and try whether you can pass the pass and deal with it easily.
What is circular dependency? How to ...
Posted by erasam on Wed, 17 Nov 2021 00:14:40 -0800
Design pattern - structural pattern
Describes how to combine classes or objects to form a larger structure
Structural patterns can be divided into class structural patterns and object structural patterns: Class structured pattern: generally, there are only inheritance and implementation relationships.
Object structured patterns: according to the "composite Reuse Princi ...
Posted by ditusade on Wed, 17 Nov 2021 00:09:10 -0800
Golang uses object-oriented thinking to program 2
Remember the best code I've ever written for this vegetable chicken.
The purpose is to write a configuration file saving module to save some configurations that need to be saved in the project. Because the data to be saved is scattered in many modules. I have thought about building a large structure, and then put all the data to be saved into ...
Posted by teebo on Tue, 16 Nov 2021 08:08:20 -0800
Build two-dimensional laser SLAM from scratch -- code implementation of back-end optimization based on ceres
In the last article, we analyzed how to use G 2O to optimize the pose map
Because g2o naturally optimizes the pose graph, it is very suitable for the interface of karto's pose graph. It only needs to assign the corresponding vertices and constraints respectively
In this article, let's take a look at another commonly used optimization library ...
Posted by melrse on Tue, 16 Nov 2021 00:40:44 -0800