J2EE knowledge summary
1. Why DTD?
2. What is DTD?
3. Where is DTD used?
4. How to use DTD?
5. Example explanation
1. Why XML?
2. What is XML?
3. Where is XML used?
4. How is XML used (XML modeling)?
5. Example explanation
1. Why reflection?
2. What is reflex?
3. Where is ...
Posted by esthera on Wed, 10 Jun 2020 22:54:42 -0700
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.
1. Drawin ...
Posted by henrygao on Wed, 10 Jun 2020 22:25:46 -0700
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
The properties that a profile can configure refer to:
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
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
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)
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
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
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
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
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
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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