Menu management list data presentation (PROJECT03_DAY01_01)

3. Menu management list data presentation 3.1 data architecture analysis After loading the menu list page, start the asynchronous loading operation of menu data. This menu list page should present the menu and superior menu information. During data query, the data encapsulation and transmission process is shown in figure-8. Figure-8 Note: Th ...

Posted by cybercog on Fri, 24 Sep 2021 12:50:58 +0200

Mengxin image processing

Principle of image http://www.lizibuluo.com/8bit/ This website is a random drawing website, you can see a lot of small squares. These small squares are pixels. Pixels are composed of small squares of an image. These squares have a clear position and assigned color value. The color and position of the small squares determine the appearance of th ...

Posted by sovtek on Fri, 24 Sep 2021 12:05:45 +0200

Dahua design pattern - Reading Notes - technology - updating

Clue barNote barWrite a calculator programSee Appendix 1Why is movable type printing called one of the four great inventions in ancient China?As shown in Figure 1-1 1. Words can be directly replaced and maintainable.2. The completed words can be reused. 3. Words can be expanded freely 4. The characters can be arranged horizontally and vertica ...

Posted by spillage on Fri, 24 Sep 2021 02:50:31 +0200

Java methods refer to beginners'introductory notes

Interface Composition With the updating of java, the composition of the interface has introduced some new content as follows. Composition of the interface Constant: public static final (this default modifier can be omitted)Abstract method: public abstract (this default modifier can also be omitted)Default method (Java8 started)Static met ...

Posted by menios on Thu, 23 Sep 2021 21:25:18 +0200

How to use Java to determine if a given number is a prime number

Concerning the definition of prime number: prime number is also called prime number. A natural number greater than 1 is called a prime number if it cannot be divided by any other natural number except 1 and itself; otherwise it is called a total number (specifying that 1 is neither a prime number nor a sum). Algorithms for generating prime num ...

Posted by phpstuck on Thu, 23 Sep 2021 21:10:41 +0200

Amazingly, how easy is Spring JdbcTemplate to write, delete, and check?

This article was intended to write about spring transactions, but JdbcTemplate-related functionality is used in most cases of transactions, so let's start with JdbcTemplate. What is JdbcTemplate? To review, the original way to operate db in java is pure jdbc. Whether every operation db needs to load database drivers, get connections, get Prep ...

Posted by buckboru on Thu, 23 Sep 2021 18:39:19 +0200

[out of order version ● sword finger offer] daily algorithm problem punch in problem solution - Search and backtracking algorithm (topic No. 40,45,61)

Punch in day13 Question 1: Sword finger Offer 55 - I. depth of binary tree Enter the root node of a binary tree to find the depth of the tree. The nodes (including root and leaf nodes) passing from root node to leaf node form a path of the tree, and the length of the longest path is the depth of the tree. For example: Given binary tree [ ...

Posted by Lucky_PHP_MAN on Thu, 23 Sep 2021 17:02:59 +0200

SpringBoot exception handling

By default, the Spring Boot project error page and information will be displayed directly on the browser. As shown below: However, after the project is actually launched, the user experience is absolutely terrible. You should give users a more friendly error prompt after encountering an error. Error page prompt Set specific status cod ...

Posted by donny1298 on Thu, 23 Sep 2021 16:44:24 +0200

Hengtai essay

choice What is incorrect about ArrayBlockingQueue? Its main application scenario is the "producer consumer" modelIt is thread safeAllow element to be nullSet capacity that must be displayed There is no parameterless structure, so the length must be initialized to prevent it from becoming an unbounded data queue. There may be ...

Posted by chuspy on Thu, 23 Sep 2021 15:05:37 +0200

Spring MVC file upload

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it 1, About multipart requests The data submitted by the forms we generally use are text data, such as our user information form. When the form is submitted, the "attribute value" ...

Posted by WebMonkey on Thu, 23 Sep 2021 15:02:27 +0200