Programmer Group

This article uses jdk1.8 version and eclipse to develop the code under the software environment. Beginners should install the environment first. If necessary, please check it [Java] JDK installation and environment configuration [Java] Eclipse installation and J2EE development environment configuration Introduction to Web server } Web S ...

When I do the project again, the customer needs me to implement a function, probably when adding classifications, if the database has the same classifications, the jsp interface will prompt for information and cannot be added successfully.The results are as follows:   Below is the idea for implementation: 1. First implement an onblur event in ...

Add group groupadd www Add user WWW: useradd - G www under www group Modify configuration file nginx.conf : user www www; worker_processes 2; events{ worker_connections 1024; } http{ #Set the default type to binary stream default_type application/octet-stream; server_names_hash_bucket_size 128; #Specify the hea ...

Asynchronous call Send asynchronous requests (review) <a href="javascript:void(0);" id="testAjax">Visit controller</a> <script type="text/javascript" src="/js/jquery-3.3.1.min.js"></script> <script type="text/javascript"> $(function(){ $("#testAjax").click(funct ...

Above (design mode visitor mode): https://blog.csdn.net/qq_16498553/article/details/106934637 catalog background What is the business representative model? Role: advantage: Disadvantages: What can the business representative model do? Business representative model class diagram Source code ...

get ready: Markdown authoring tool Youdaoyun notes Idea development tools GItHub project address analysis: The whole process of class loading and running: When we use the java command to run the main function of a class to start the program, we first need to load the main class into the JVM through th ...

Day 14 of Kite's learning framework 1. Spring MVC interceptor Introduction: Spring MVC's processor interceptor is similar to the Filter in Servlet development, which is used for preprocessing and postprocessing the processor. Users can define some interceptors to implement specific functions. When i ...

Spring MVC core technology 1, Request redirection and forwarding When the processor finishes processing the request and jumps to other resources, there are two ways: request forwarding and redirection. According to the type of resources to jump, it can be divided into two categories: jump to page an ...

Design and implementation of book management system The structure of library staff is complex, the number of staff is limited, and it involves a wide range of aspects. If manual operation is also used to deal with the problem of book borrowing, the work will be very tedious, requiring a lot of manpow ...

1. What is a filter? In the process of client to server, when sending a request, if there is non-conforming information, it will be intercepted by the filter, if it is conforming, it will be released, and when the server responds to the client, it will also be judged that if there is non-conforming in ...