1, MVC framework (model view controller)
MVC, also known as programming mode, is a software design idea, which divides data operation, page display and business logic into three levels (modules), which are completed independently and called each other
Model layer View Controller
1.2MVC mode details
MVC is not unique ...
Posted on Mon, 20 Sep 2021 05:46:27 -0400 by Ekano
When uploading files, you need to specify the media type. There are the following two types.
In HTML, the enctype attribute in the form specifies how the form data should be encoded before being sent to the server.
By default, the form data is encoded as "application/x-www-form-urlencoded". That is, ...
Posted on Sun, 19 Sep 2021 05:25:46 -0400 by littlehelp
asdsServlet is an extension branch written in Java language that is applied to the Web server side. It precedes JSP and handles HTTP requests in Web applications conveniently. In the development of Java Web programs, Servlet is mainly applied to a variety of business logic, it has more business logic layer meaning than JSP, and Servlet securit ...
Posted on Sat, 18 Sep 2021 15:36:29 -0400 by msinternet
1, Single case model
Singleton model: a pattern in which a class has only one instance and the class can create the instance itself. Singleton model and factory pattern based on java
(2) Implementation mode
Common implementation methods include lazy mode, hungry mode, double check lock, static internal class, enumeration ...
Posted on Sat, 18 Sep 2021 00:13:10 -0400 by jmantra
Chapter I overview of SprngMVC
1.1 basic description of spring MVC
springmvc is based on spring and is a module in spring. It is used for web development. springmvc is called spring web mvc, which shows that it is the core technology of spring. For web development, springmvc is the internal mvc architecture mode
Spring MVC is ...
Spring assembles beans based on annotations
Since JDK 5.0, Java has provided Annotation Spring does not use annotations to assemble beans by default, so you need to add context: annotation config / in the configuration file to enable annotations.
Common annotations in Spring are as follows
This annotation can be used to describe ...
Posted on Wed, 15 Sep 2021 01:51:58 -0400 by Blade280891
Three components of Java Web. They are: Servlet program, Listener listener and Filter filter
1, Listener listener
Listener listener, which is one of the three major components of Java Web. The three major components of Java Web are Servlet program, Filter filter and listener listener.Listener, which is the specification of Java EE, is the int ...
Posted on Fri, 10 Sep 2021 15:51:11 -0400 by greg252
1. Review MVC
1.1 what is MVC
MVC is the abbreviation of model, view and controller. It is a software design specification.It is a method to organize code by separating business logic, data and display.The main function of MVC is to reduce the two-way coupling between view and business logic.MVC is not a design pattern, MVC ...
Posted on Wed, 08 Sep 2021 14:50:31 -0400 by dgudema
Spring MVC file upload and download
File upload and download are frequently used functions in Web projects. Spring MVC can well support file upload and download; This section creates a new SpringMVC-09-File project. Learn to upload and download files in SpringMVC.
1. File upload
1.1 pre knowledge
File upload is to transfer data from the cli ...
Posted on Mon, 06 Sep 2021 23:37:58 -0400 by dai.hop
1. Integration of spring and Web Environment
1.1 ApplicationContext application context acquisition method
The application context object is obtained through the new ClasspathXmlApplicationContext(spring configuration file), but each time a Bean is obtained from the container, the new ClasspathXmlApplicationContext(spring configuration file) ...
Posted on Sat, 04 Sep 2021 01:20:27 -0400 by evildarren