javaSE learning notes (15) -- buffer stream, transformation stream, serialization stream

Buffer flow I reviewed some basic flows yesterday. As an introduction to IO flows, today we will see some more powerful flows. For example, the buffer stream that can read and write efficiently, the conversion stream that can transform the encoding, and the serialization stream that can persist the storage object, etc. These more powerful flows ...

Posted on Sat, 15 Feb 2020 12:51:20 -0500 by wint.thaw

Widget widget

View app components in the document - > app widget 1. Write a class to inherit AppWidgetProvider The service is enabled here. If the service is not written, an error will be reported in the creation of the widget. You can shield the function of opening and closing the service (there is no shield here). If there is no error, ...

Posted on Sat, 15 Feb 2020 10:32:46 -0500 by KrisCons

If the COVID-19 epidemic as a stock factor

This paper uses the WindAlpha single factor research framework of wankuang platform to explore the impact of COVID-19 epidemic on the stock market from the perspective of stock factors. IC analysis found that there was a significant negative correlation between the severity of the epidemic and the retu ...

Posted on Sat, 15 Feb 2020 03:25:17 -0500 by networkguy

SpringMVC Framework 3 (Resolve Chinese Scrambles with Filters, Interceptors in SpringMVC)

SpringMVC Framework 3 1. Use filter to solve Chinese random code [1] Mode 1: Configure your own character encoding filter A. Configuring the web.xml file <!--Configure Character Encoding Filters--> <filter> <filter-name>enc</filter-name> <filter-clas ...

Posted on Sat, 15 Feb 2020 01:08:01 -0500 by aayatoos

Application scenario of XSD-10 XSD Schema

Application scenario of XSD Schema 10 XSD Schema application scenario 10.1 store some configuration information 10.2 interface interaction Quote 10 XSD Schema application scenario Introduce some scenarios of XSD Schema application; 10.1 store some configuration information Such as storing cl ...

Posted on Fri, 14 Feb 2020 09:11:58 -0500 by arnihr

Spring IOC 12 annotation based configuration

Annotation injection is performed prior to XML injection, so when both methods are used for injection, the XML configuration overrides the annotation configuration. They are implicitly registered in the following way, and implemented through the post processor. <?xml version="1.0" encoding="UTF-8"?&g ...

Posted on Fri, 14 Feb 2020 07:19:07 -0500 by pootergeist

Python reptile Tour

Preface: Recently, I learned some basic syntax of python, and built a simple website with the asynchronous IO framework (although some of them don't understand it yet) with teacher Liao Xuefeng. But slowly, there's another interesting place for Python to write reptiles. I'll learn it when I have plent ...

Posted on Fri, 14 Feb 2020 03:42:31 -0500 by hellangel

Explanation of SpringBoot Transaction Control

Preface This article focuses on the tutorial used by SpringBoot's Transaction of Things. SpringBoot Transaction Note: If you want to get the project directly, you can skip to the bottom and download the project code through the link. Transaction Transaction management In Spring, transactions ar ...

Posted on Thu, 13 Feb 2020 22:34:19 -0500 by Jeremias

Python 3 native reptile

1, Reptile instance 1. Principle: text analysis and extraction information regular expression. 2. Example purpose: crawling the popularity ranking of the anchor under a certain category of panda TV Analyze site structure Operation: F12 view the HTML information, Ctrl+Shift+C mouse select to find the corresponding HTML.   The 3. step:   Prelude: ...

Posted on Wed, 12 Feb 2020 11:23:30 -0500 by Mr_J

Quick learning - Spring integrates Spring MVC

Chapter 12 Spring integrating Spring MVC 12.1 integration of spring and spring MVC: Do you need to integrate Spring MVC with Spring? Do you need to add the IOC container of Spring? Do you need to configure the ContextLoaderListener in the web.xml file to start the Spring IOC container? Need: usual ...

Posted on Wed, 12 Feb 2020 06:58:00 -0500 by jonemo