Tag: ppi

React technical principles and code development practice: use React to develop a shopping cart application

1. Background Introduction An indispensable function before a shopping website or e-commerce platform goes online is the “shopping cart”. This article will lead readers to fully understand the application of React technology in shopping carts through a shopping cart application case developed based on the React framework. We can start with the following points to […]

Analysis of anonymous mapping page fault exception in Linux kernel virtual memory management

Before explaining the anonymous mapping page fault exception, we must first understand what is an anonymous page? Corresponding to the anonymous page is the file page. We should understand the file page well, which is the page that maps the file, such as mapping the file to the virtual memory through mmap and then reading […]

Java small shopping system (shopping cart)

front page import java.util.Arrays; import java.util.Scanner; /* Home page of product construction and purchase logic module Developer:XXXX Version:v1.1 */ public class MyPage { public static void main(String[] args) { //In the entire program, mypay1 is instantiated, mypay1, mypay2, mypay3, mypay4, and mypay5 all need to be instantiated, assigned, and finally called. //mypay1, mypay2, mypay3, mypay4, […]

R language EG (Engle-Granger) two-step cointegration test, RESET, Granger causality test, VAR model to analyze the time series relationship between CPI and PPI…

Full text link: http://tecdat.cn/?p=31108 As basic indicators for measuring inflation, the relationship and transmission mechanism of consumer price index CPI and producer price index PPI have always been core issues in macroeconomic research. (Click “Read the original text” at the end of the article to get the completecode data) . Research on this issue obviously […]

SpringMVC–@RequestMapping annotation

@RequestMapping annotation The function of @RequestMapping annotation The location of the @RequestMapping annotation @RequestMapping annotated properties 1. value attribute 2. method attribute 3. params attribute (understand) Replenish @RequestParam @RequestHeader @RequestBody @RequestBody gets request parameters in json format @ResponseBody @RestController annotation Function of @RequestMapping annotation The function of the @RequestMapping annotation is to associate the request […]

[C#] Use of Mapster object mapping

Series of articles [C#] Number generator (define order number rules, fixed characters, serial numbers, business order numbers) Link to this article: https://blog.csdn.net/youcheng_ge/article/details/129129787 [C#] Date range generator (start date, end date) Link to this article: https://blog.csdn.net/youcheng_ge/article/details/129040663 [C#] Component development, calling dll component methods Link to this article: https://blog.csdn.net/youcheng_ge/article/details/129492112 [C#] Use of data entity classes Link to […]

Project practice: component scanning (5) – parse methods with GetMapping or PostMapping and finally encapsulate them into ControllerDefinition

1. ControllerDefinition package com.csdn.mymvc.core; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; //Suppose there is a uri:/fruit/index @Data @NoArgsConstructor @AllArgsConstructor public class ControllerDefinition { private String requestMapping; private Object controllerBean; private Map<String, Method> methodMappingMap = new HashMap<>(); } 2. ComponentScan package com.csdn.mymvc.core; import com.csdn.mymvc.annotation.*; import java.io.File; import java.lang.annotation.Annotation; import java.lang.reflect.Field; import […]

Project practice: component scanning (4) – filtering bean instances with RequestMapping annotations

1. ControllerDefinition package com.csdn.mymvc.core; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; //Suppose there is a uri:/fruit/index @Data @NoArgsConstructor @AllArgsConstructor public class ControllerDefinition { private String requestMapping; private Object controllerBean; private Map<String, Method> methodMappingMap = new HashMap<>(); } 2. ComponentScan package com.csdn.mymvc.core; import com.csdn.mymvc.annotation.*; import java.io.File; import java.lang.annotation.Annotation; import java.lang.reflect.Field; import […]