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The birth of J.U.C
Preface J.U.C is a shorthand for java package java.util.concurrent, which is abbreviated in Chinese and contracted. It is a new basic api for writing ...
Introduction to the battle of URLOS - making LAP Website Environment
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Pgpool-II + PostgreSQL one main source and two standby source compiling environment
Host IP Virtual IP server1 192.168.222.141 192.168.222.200 server2 192.168.222.142 server3 192.168.222.143 Item Value Detail PostgreSQL version 10.10...
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Weblogic domain Start, Set Default User Name and Password, and Problems encountered
Weblogic's domain instance is starting and needs to set default passwords, etc. If the default password is not set at startup, an exception will...
Analysis of Mysql 5.7 Error Reporting 1546, 1577 and 1682
Environmental description:The backup data of xtrabackup on MySQL 5.6.40 is imported into MySQL 5.7.24 instance, the service of MySQL 5.7 is started, ...
springboot - Integrated druid
Configuration of pom.xml <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boo...
CentOS 7 Build Source Pack Build LNMP Environment
1. Install epel source yum install -y epel-release 2. Install the required software yum install -y gcc automake autoconf libtool make gcc-c++ glibc li...
Interaction between Android Q Private Directory and Public Directory Files (Read, Copy, Save, etc.) - Pittkai
Android Q is about to launch its official version. This article is based on beta 6, which is close to the final version of Q. It would be better if i...
The use of pymysql module
I. Connecting to MySQL Server import pymysql # Connect to the database and call the Connect function (the Connect function returns an object of Connec...
centos server deploys flask project.
Installed environments nginx, Python 3, mysql, uwsgi, virtualenv 1. Create a virtual environment virtualenv -p python3 myblog 2. Enter the Virtual Env...
Set the Mysql character set to UTF-8 to solve Chinese garbled.
Article directory When the public number is developed, the user nickname is garbled. The result of the investigation is the encoding problem of the d...
EF Data Migration
EF automatic data migration is always a failure. At the beginning, it is all right. It can migrate automatically and fail to know why it always fails...
python interacts with database mysql
Operate mysql through pycharm's concise code block to help us understand The concrete steps can be divided into five steps. 1. Install and insta...
Netty implements synchronous "request-response" communication mechanism
demand Implementation of Netty-based "request-response" synchronous communication mechanism. Design thinking Netty provides a unified implem...
Kylin configures Spark and builds Cube
HDP version: 2.6.4.0Kylin version: 2.5.1 Machine: Three CentOS-7,8G memory In addition to MapReduce, Kylin's computing engine also has a faster S...
Details Python operation Excel files
Preface This article summarizes the third-party libraries and methods for working with Excel files using python. Introduction to Common Libraries 1.x...
Computing the Memory Occupied by object in android jvmti Application
The day before yesterday, I was aware of the question: What is the principle of Apply Changes provided by Android Studio 3.5? One responded to JVMTI,...
django - Editing Students
Adding Editor Links to Student List Page Write routes so that the path corresponds to the view function skill, quickly create view functions Editing ...
C3P0&Druid: Two Methods of Using Database Connection Pool
Database Connection Pool-C3P0 & Druid (1) Database connection pool Everything has its existence significance. When we first learn jdbc, we set up ...
Mybatis Initial Learning Notes
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JDBC: You always have to learn to connect to a database!
BWH_Steven: Love you again with JDBC (1) Getting started with JDBC (1) Overview Java Database Connectivity (JDBC) is an application interface in the J...
1-Develop Shared APP (Build Guide) - Build your own server quickly
The APP installation package download link: http://www.mnif.cn/appapk/IotDevelopmentVersion/20190730/app-debug.apk Or scan for QR code download Access...
Practice VxLAN under Linux
This article was first published in my public number Linux cloud computing network (id: cloud_dev), focusing on dry goods sharing. There are 10T books...
C# Learning Records Read Excel with OleDB
The project requires me to read an Excel form. The way on the Internet is to use Excel as a data source and OleDB to read it. As I understand it, Ole...
Fields and field parameters of the model
Introduction to ORM 1. Concept: ORM (Object Relational Mapping), Object Relational Mapping 2. Essence: mapping between classes and databases 3. Advant...
Getting Started with Webrtc Video Communications
Getting Started with Webrtc Video Communications WebRTC, named after Web Instant Messaging, is an open source W3C recommendation that was incorporate...
Parsing xml files using SAX
SAX parsing using JAXP (XMLReaderFactory, XMLReader, SAXParserFactory, and SAXParser) 1. We do this through XMLReaderFactory, XMLReader, as follows 1....
Java Basic Tutorial - Conversion Stream
Conversion flow Usually, the default encoding method for Window s is GBK, and UTF-8 encoding is generally recommended for Java projects. At this time,...