ESP32 method of reading and writing SD card using HSPI
It has been almost a year since I used ESP32. I have a lot of experience and experience. Recently, I began to write articles to record my experience and process. The advantage is that it is convenient for me to find information and review, and may also help others. It's also a good thing.
Let's record today's experience first
Today, we will r ...
Posted by welshmike on Mon, 06 Dec 2021 17:51:49 -0800
The driver cannot establish a secure connection with SQL Server by using secure sockets layer (SSL) encryption. Error: "no approve protocol (protocol is disabled or cipher"
This article solves the following exception information, hoping to be helpful to your programming!
Abnormal information
The driver cannot establish a secure connection with SQL Server by using secure sockets layer (SSL) encryption. Error: "no appropriate protocol (protocol is disabled or cipher suits are inappropriate)"“
Oper ...
Posted by feidakila on Sun, 05 Dec 2021 16:15:32 -0800
MyBatis framework -- multi table query and dynamic sql
catalogue
1. Multi table query
1.1 many to one
(1) The first way is to query through linked list.
(2) The second way is through nested query. ---- two queries.
one point two One to many
2. Dynamic SQL
(1) if with where
(2) [choose when otherwise] and where
(3)set tag --- modify some fields ...
Posted by Pandolfo on Sun, 05 Dec 2021 16:15:44 -0800
SSM integration -- crazy God said Java learning notes
SSM integration
Bili Bili crazy God says Java learning website The article is only for sharing learning experience and reviewing. It is more effective to check the formal video website and official documents
Make a book query project using SSM framework
Simple core axis of the project
The eclips e development tool I use may be differen ...
Posted by omidh on Mon, 29 Nov 2021 11:02:43 -0800
JAVA constructor / constructor and this usage
Construction method / constructor
● basic grammar
```java
·[Modifier ]Method name(parameter list ){
Method body;
}
```
1. The modifier of the constructor can be default or public protected private
2. The constructor has no return value
3. The method name and class name must be the same
4. The parameter list has the same rules as the membe ...
Posted by jphilapy on Fri, 26 Nov 2021 17:18:43 -0800
JavaBean and EL expressions
Learning objectives 1: JavaBean 2: EL expression Learning content 1: Initial JavaBean 1,1 what is a JavaBean JavaBean is a reusable software component in java development language. Its essence is a Java class. In order to standardize the development of JavaBeans, Sun company released the JavaBean specification, which requires a standard JavaB ...
Posted by kday on Sat, 20 Nov 2021 19:52:46 -0800
Chapter 2 xml Technology
Chapter 2: xml, http protocol, tomcat 1.XML 1.1 XML overview 1. What is xml: English Extensible MarkUp Language.
Extensible markup language: markup in xml is extensible.xml version number 1.0, 1.1 xml usage: it is used to store data1. As the format of data transmission between systems2. As the configuration file of the project3. Save data with ...
Posted by Drewser33 on Sat, 20 Nov 2021 02:38:28 -0800
Learn JAVA from scratch (basic introduction)
1. Build JAVA development environment
Uninstall JDK (please ignore those not installed)
Delete the JDK installation directory Delete JAVA_HOME and CLASS_PATH environment variable Delete PATH and JAVA_HOME and CLASS_PATH related environment variables
Install JDK
Go to Oracle's official website to download JDK or go to some domestic image ...
Posted by iamtheironman on Sat, 20 Nov 2021 01:49:42 -0800
Constructor and destructor of single inheritance derived class
#include <iostream>
#include <cstdio>
#include <cmath>
#include <climits>
#include <iomanip>
#include <windows.h>//
#include <iostream>
#define MAX(x,y) (x)>(y)?(x):(y)
#include <string.h>
using namespace std;
class A
{
public:
A()
{
a=0;
co ...
Posted by blackwidow on Tue, 16 Nov 2021 05:17:43 -0800
session, simple usage of filter, file upload
1. Open eclipse to establish a dynamic website
2. Create a new index.html under WebContent and modify the access path
(1) Normally, you need to add an html name, such as http://localhost:8080/index.html To access the page, now want to http://localhost:8080 Direct access
(2) Write code in html
<!DOCTYPE html>
<html>
< ...
Posted by s4salman on Wed, 10 Nov 2021 21:29:06 -0800