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exception handling Exception handler Exception classification management code: import org.springframework.stereotype.Component; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRespon ...

MVC JSON JSON is a data format. To put it bluntly, it is the object (data structure) in js student name, age, province {name: "jingtian", age:26,province: "henan"} - the object in js How to write json data? How to understand? Just remember the following conclusions If you see that {} represents an object If you see [ ...

What is AOP AOP (Aspect Oriented Programming) means: Aspect Oriented Programming, which realizes the unified maintenance of program functions through precompiled mode and runtime dynamic agent. AOP is the continuation of OOP, a hot spot in software development, an important content in Spring framework, and a derivative paradigm of functional p ...

Open Closed Principle Basic introduction: The opening and closing principle is the most basic and important design principle in programming A software entity such as class, module and function should be open to extension (for the provider) and closed to modification (for the user). Build the framework with abstraction and extend the detail ...

Author: Ricardo mjiang preface Students who have done layout performance optimization know that in order to optimize the interface loading speed, the layout level should be reduced as much as possible. This is mainly because the increase of layout level may lead to the exponential growth of measurement time. Composition does not have this p ...

Today, we introduce an example of using MVC design pattern to build GUI in PyQt5. This case comes from Chapter 7 of MATLAB object-oriented programming - from introduction to design pattern (version 2). For details about the GUI tool design of deposit and withdrawal, please refer to pages 127 ~ 160. The final interface created by PyQt5 is as fo ...

Spring MVC type Converter In the spring MVC framework, you need to collect user request parameters and pass them to the application controller component. All request parameters can only be string data types. The spring MVC framework must Convert these strings into corresponding data types. Generally, JSP+Servlet requires the developer to perfo ...

Application of VB in bidding agency business In the business of government procurement and bidding agency services, many documents need to use the model and reference format documents formulated by relevant departments. For example, government procurement projects must edit and publish announcements with reference to the specification for ...

preface: From Spring 3.0, @ Configuration is used to define the Configuration class, which can replace the xml Configuration file. The annotated class contains one or more methods annotated by @ bean. These methods will be scanned by the AnnotationConfigApplicationContext or AnnotationConfigWebApplicationContext class, and used to build the bea ...

0. Introduction         This article is used to record my spring MVC learning content and some of my understanding. The reference materials are from the following:        Crazy God says Java -- spring MVC        Common methods of fastjson_ authority39 blog - CSDN blog_ Common methods of fastjson         ...