Although many people know that I have been using Java, what is less known is that for the past few years, I have also been quietly developing backend API server projects in Python. Along the way, I explored and discovered several extremely useful tools. Not only do they optimize my development process, but they also […]
Tag: backend
jsp+servlet online ordering system (front desk, backend) based on javaweb+mysql (java+jsp+servlet+mysql+dbutil+tomcat)
jsp + servlet online ordering system (front desk, backend) based on javaweb + mysql (java + jsp + servlet + mysql + dbutil + tomcat) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, […]
jsp+servlet online ordering system (front desk, backend) based on javaweb+mysql (java+jsp+servlet+mysql+dbutil+tomcat)
jsp + servlet online ordering system (front desk, backend) based on javaweb + mysql (java + jsp + servlet + mysql + dbutil + tomcat) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, […]
[Ruoyi Management Backend] Forced password change after user login
There is a recent need to adjust the Ruoyi management background: if the user has not changed his password for three months (a long period of time), he needs to forcibly change his password when logging in, otherwise he will not be able to log in to the system. 1. Back-end project adjustment From the […]
[Linux] Linux environment configuration and deployment project backend
Welcome Huihui’s Code World ! !? ? Let’s take a look at the related operations on Linux written by Huihui Table of Contents Welcome Huihui’s Code World! ! 1.Linux environment configuration 1.JDK ①Upload the installation package to the server ②Unzip the corresponding installation package ③Configure environment variables 2. Tomcat ①Start tomcat ②Firewall settings 3.MySQL ①Delete […]
[Backend] Implement Java and python communication
Business needs An image processing system, Python is responsible for the image processing module of artificial intelligence, the backend uses the Java ecosystem, and the frontend is written using Vue. This encounters a problem. The image data that needs to be processed is transmitted from the front end to the back end. The back end […]
JavaEE-Blog System 1 (Interaction between database and backend)
This part includes an overview of website design, interaction between database and backend; The database operation code is as follows: –Write SQL to complete database and table building operations create database if not exists java_blog_system charset utf8; use java_blog_system; — Create two tables, one to store blog information and one to store user information. drop […]
When the java backend returns data to the front end, attributes with empty or NULL values are removed and certain attributes are ignored.
Table of Contents 1. Usage scenarios 2. Environmental preparation 1. Introduce dependencies 2. Entity class 3. Example 1. Do not return null value (1)Method (2)Test (3)Explanation 2. Do not return some attributes (1)Method (2)Test 4. Jackson common annotations 1. @JsonProperty 2. @JsonPropertyOrder 3. @JsonInclude 4. @JsonIgnoreProperties 5. @JsonFormat 6. @JsonUnwrapped 1. Usage scenarios During the […]
Ruoyi Vue login function backend code calling process
Although this blog talks about the call of ruoyi’s back-end code, looking at the front-end code can help with understanding, so in this blog I will first introduce the front-end code, and then talk about the implementation of the back-end. Table of Contents 1. Verification code 1.1 Front end 1.2 Backend 2. Log in 2.1 […]
Javascirpt encapsulates xhr to upload multiple pictures, and solves the problem that the formdata backend only accepts one picture, and uses the prototype chain to encapsulate it to reduce resource waste and improve performance.
The prototype chain of the function is used here to encapsulate each shared function and privileged method to access private data. <html> <head> <meta http-equiv=”Content-Type:text/html;charset=utf-8″/> <title></title> <script type=”text/javascript” src=”common.js”></script> <style type=”text/css”> #preview {<!– –> display: flex; flex-wrap: wrap; width: 580px; padding: 10px; justify-content: start; } .icon-po {<!– –> overflow: hidden; position: relative; width: 150px; height: […]