J2EE knowledge summary

J2EE knowledge summary 1, DTD 1. Why DTD? 2. What is DTD? 3. Where is DTD used? 4. How to use DTD? 5. Example explanation 2, XML 1. Why XML? 2. What is XML? 3. Where is XML used? 4. How is XML used (XML modeling)? 5. Example explanation 3, Reflex 1. Why reflection? 2. What is reflex? 3. Where is ...

Posted by esthera on Wed, 10 Jun 2020 22:54:42 -0700

[js] D3 drawing parallel coordinates

Parallel coordinate system (parallel) is a kind of commonly used chart to visualize high-dimensional data. Parallel coordinate system has a good mathematical basis, and its projective geometry interpretation and dual characteristics make it suitable for visual data analysis. Article catalog 1. Drawin ...

Posted by henrygao on Wed, 10 Jun 2020 22:25:46 -0700

python crawling Douban short film review + CI Yun

1, requests+lxml non login crawling Douban data 1. First, open Douban and find the url of the short movie review you want to crawl, for example:2. Open the developer tools in the web page, and most computers can press F12 directly, but there are also differences. For example, ThinkPad uses Fn+F12 to open, find the network in the page - > cli ...

Posted by jpopuk on Tue, 09 Jun 2020 22:25:09 -0700

SpringBoot Learning Notes--Automatic Configuration Principle

The properties that a profile can configure refer to: https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html Principle of automatic configuration 1. When Spring Boot starts, the main configuration class is loaded, and the auto-configuration function is tu ...

Posted by fatherlyons on Mon, 08 Jun 2020 18:27:24 -0700

042 Example 10-Text Word Frequency Statistics

Catalog 1. Analysis of "Text Word Frequency Statistics" 1.1 Problem Analysis 2. "Hamlet English Word Frequency Statistics" Example Explanation 3. Explanation of "Person appearance statistics in the Romance of the Three Kingdoms" as an example (1) 4. Explanation of "Person App ...

Posted by mkoga on Mon, 08 Jun 2020 17:09:48 -0700

Android Gesture Recognition Applications: Hand-on instructions for learning GestureDetector

Preface Gesture recognition is very common in Android development applications Today, carson will explain in detail the Android Gesture Recognition class: the use of the GestureDetector class.(with examples) Catalog brief introduction Next, I'll take an ex amp le and describe in detail the u ...

Posted by Rayn on Sun, 07 Jun 2020 17:46:53 -0700

C2 A0 -> NO-BREAK SPACE with special spaces in UTF-8 encoding

Exception data tracking Recently found a problem with field value data exception in database. Spaces are not allowed in this string field in business scenarios, but some data still has "spaces". After repeated validation, it is found that code written by you will indeed remove the space trim. After repeated debugging, there is no prob ...

Posted by 990805 on Sat, 06 Jun 2020 10:12:56 -0700

Android Chart Gallery MPAndroidChart(6) - A new way of thinking, the implementation of horizontal bar charts

Android Chart Gallery MPAndroidChart(6) - A new way of thinking, the implementation of horizontal bar charts 1. Basic implementation We've achieved bar charts before, but now let's see how horizontal bar charts work. To put it in perspective, we'll just cross them and see the effect: It's much easier now to write a b ...

Posted by bysable on Sat, 06 Jun 2020 09:12:50 -0700

Initialization of Spring container

After reading this article, you will get Learn about the Spring container initialization process The best practice of ThreadLocal in Spring Answer the Spring container initialization process in the interview introduction Let's start with a simple and common code <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING ...

Posted by henryblake1979 on Fri, 05 Jun 2020 22:41:05 -0700

Dragonfly FM course has a wide variety of courses. Use python to climb the hot course rankings

  Preface The text and pictures in this article are from the Internet. They are for study and communication only. They do not have any commercial use. The copyright is owned by the original author. If you have any questions, please contact us in time for processing.   Now there are many kinds of courses in APP for all kinds of learning, and ...

Posted by Benmcfc on Tue, 02 Jun 2020 01:50:16 -0700