Handwriting a simple to SpirngMVC framework

Spring is definitely about eating chopsticks for java programmers.We can hardly live without it every time we do programming, and we believe that it will still play an important role in the past, in the present or in the future.I have some self-perception of spring, so I have compiled a simple set of SpirngMVC by referring to the videos and art ...

Posted on Thu, 04 Jul 2019 14:38:27 -0400 by myfafa

Scala-Files and Regular Expressions

Chapter 15 Files and Regular Expressions 15.1 Read Lines import scala.io.Source object FileSyllabus { def main(args: Array[String]): Unit = { //File Read val file1 = Source.fromFile("D:\\Data\\Scala\\Attendance Notes\\note", "UTF-8") /* Mode 1: */ // val lines = file1.getLines.mkString("\n") // ...

Posted on Thu, 04 Jul 2019 13:37:51 -0400 by francoisp

Summary of java set knowledge

aggregate list ArrayList list = new ArrayList<>(); ListIterator<String> iterator = list.listIterator(); while (iterator.hasNext()) { String string = (String) iterator.next(); System.out.println(string); } for(String s : list){ System.out.println(s); } Collection boolean add(Object e) Ensure that this c ...

Posted on Wed, 03 Jul 2019 17:59:51 -0400 by PaulRyan

[PHP] Disk Search Engine-Acquisition and Crawl Baidu Disk Sharing Files to Realize Disk Search (II)

Summary of Previous Situations: Recently, we implemented a simple web search program using PHP, and associated with the Wechat public platform, the name of which is Disk Novel. Users can enter keywords through the public number, which will return the corresponding download address. This is such a simple function, similar to a lot of web search ...

Posted on Wed, 03 Jul 2019 14:50:33 -0400 by BRUUUCE

python algorithm and data structure-queue (44)

Introduction of queues The definition of queue: Queue is a special linear table, which only allows deletion at the head of the table (front) and insertion at the end of the table (rear). This structure is called queue. The end of the insertion operation is called the end of the queue, and the end of the deletion operation is called the end of ...

Posted on Wed, 03 Jul 2019 14:12:43 -0400 by shooka

GIS Business, Nearby Search Performance Optimization

Label PostgreSQL, PostGIS, KNN, order by distance sort optimization background It is very common to retrieve adjacent points in spatial data, such as using longitude and latitude as coordinate points to retrieve information from other points within 1 km of this point. Recently, some netizens asked such a question, how to optimize it. The cur ...

Posted on Tue, 02 Jul 2019 19:40:53 -0400 by keakathleen

Twelfth and Thirteenth Week Operations [Linux Micro Position]

1. Describe the working principle of LVS with graphics.lvs-nat modelThe main purpose is to modify the target IP address to select a new RS IP address. That is to say, when requesting to enter the load balancer to do DNA T, when responding to the load balancer to do SNAT.1. When the user request arrives at Director Server, the requested data mes ...

Posted on Tue, 02 Jul 2019 17:38:46 -0400 by kryptn

An example goes into join

Table structure Looking at the structure of the two tables tb_order and users, there is a foreign key relationship between the user_id of the tb_order table and the ID of the users table: CREATE TABLE `tb_order` ( `id` int NOT NULL AUTO_INCREMENT, `product_name` varchar(64) NOT NULL DEFAULT '', `buyer` char(20) NOT NULL DEFAULT '', ...

Posted on Tue, 02 Jul 2019 15:33:13 -0400 by gazza52

ajax Foundation for WEB Front-end Development + Cross-domain Access

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>ajax Four steps of interaction</title> <div class="message"></div> </head> <body> <input type="button" value="ajax Four steps of interaction"> <script> document.querySelector("input").onclick=funct ...

Posted on Tue, 02 Jul 2019 14:36:01 -0400 by simply07

Observer mode in Java

Note: Based on "Java High Concurrency Programming Details - Wang Wenjun", "Deep Understanding of JVM Advanced Features and Best Practices - Zhou Zhiming", for the purpose of learning, plus self-understanding and verification.As a note, to enhance impression, do not copy, do not paste.Welcome, share your learning. Observer m ...

Posted on Tue, 02 Jul 2019 12:57:00 -0400 by darkshine