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The connection and function of controller, service layer, dao layer and logics layer in web framework.
has not quite understood the concepts of controller, service layer, dao layer and logic layer, and how to use them and why to use them in this way ...
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How to find the clockwise rotation angle of a point in Cartesian coordinate system
for example, (- 1) get 225 ...
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How to query the horizontal table?
to query the data after horizontal split, suppose the data of a business is split horizontally, and the monthly records are stored in a table. The data of each table is about 1000w. There are already more than 20 tables, such as table_201606,.,table_201...
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Mini Program, can you set JS to jump to a non-business domain name in this business domain name by opening a licensed business domain name?
because I want to open the official account page in Mini Program, but Mini Program can only open the set business domain name, I think of two ways:
1. Open a registered business domain name, and then jump to the official account page in the registered...
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Can cookie and localStorage access data across websites?
Project is the user name information required by Vue, which is stored in the user s browser. This user name information can be obtained on other websites for example, if I log in to Tencent s website in my browser, can Baidu get my Tencent account inf...
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What is stored in the database is the html code, how to blur the contents of the query tag?
what is stored in the database is the html code, which is mainly a piece of div content, including the style, does not contain the body and other tags, and the label is strict in opening and closing. If I want to query the keyword "class " now, if I us...
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Tetris problem
the map of Tetris is implemented in a two-dimensional array, and squares are also implemented in arrays, but I just don t understand how maps interact with squares.
is how to know where the square is on the map. Besides, although the two-dimensional ...
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How does QQ WeChat Group @ all Women
how does the QQ WeChat group @ all women, get all women s information ...
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JAVA DES encryption class, how to use PHP to achieve encryption, decryption
1, JAVA DES encryption class, how to use PHP to achieve encryption, decryption. (1) encryption if the key is 123mursharpAbcd, the plaintext is hello world, output 3d518daea941120d72fe3488f5d27a64 under this code, it will appear before data decryption...
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How does Filter come up with the Junzi number in a set of numbers?
for example, if there is a set of numbers such as 1, 2, 5, 7, 11, 14, how can Filter come up with two sets of numbers: [1, 2] and [5, 6, 7, 7]? ask for advice ...
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Ask everyone to help write a rule?
the original rule is as follows [1-9] {1} [0-9] {3} now I want to rule out the result of 2035. How do I write it? because I m in a hurry, I can t think for myself. Regularity is my weakness. Thank you! ...
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Do you have vue's rich text with formula, that is, the formula in the subject of mathematics, physics and chemistry?
there is no vue rich text with formulas, that is, formulas in mathematics, physics and chemistry ...
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Smtp sends email to add signature
python smtp send email setup signature? you can also say how it is sent in other languages ....
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How does the server get the picture in the input content in vue-cli 's vue-quill-editor rich text editor?
vue scaffolding code php back-end server language does not know how to get the content entered in the vue-quill-editor rich text editor api given to the official website I just say that new a quill and then use getContents (); to get the content how ...
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Ask some questions about apiCloud login interception, such as the following code and picture
as shown in the figure, if you want to do a login interception based on $api.getStorage ( userId ), the desired effect of is 1. Enter the page that can open the green box (main.html), but the other three in the red box cannot be opened directly (mes...
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WeChat Mini Programs has been reminding users that the information interface is no longer supported and how to cancel it, as shown below
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Git operation problem, how to cancel "undo last submission".
I m not familiar with the git command. I used vscode s git management tool to "undo the last commit " twice, but now I don t want to undo those commits. How can I restore them? ...
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Design of user login system
there is such a requirement: user login module, does not support the choice of login method, only a text input box, while supporting: QQ number, mobile number, e-mail, nickname, ID card, etc. (if the user filled in the values of these five fields) any f...
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What is the development language and environment of short video playback software?
ask what is the development environment and language of short video playback software similar to Douyin requirements:
if developers only have JAVA and front end now, what is the best development environment? is it okay to use Hbuilder s MUI?
wi...
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Please tell me how to write a function.
generate the corresponding loop based on the given number. If 2 is given, a double cycle is generated, and 3 is a triple cycle if 3 is given, then
for (let i = 0; i < arr.length; iPP) {
for (let j = 0; j < arr.length; jPP) {
...