java database programming (3) creating tables and adding data to tables

Let's talk about what mysql.ini is, which is to load some key value pairs for Properties. The specific operation is to create a new text document, as followsNote that the password should be changed to the password of your database, then change the suffix of the text document to ini, and then drag it to the project folder. The ...

Posted on Tue, 17 Dec 2019 06:57:22 -0800 by robmarston

Spring boot concurrent login control

Generally, the system will limit the number of people who log in to the same account. Multiple logins either limit the latter or kick out the former. Spring Security provides such a function. This article explains how to manually implement this function when Security is not used demo technology selection SpringBoot JWT Filter Redis + Redisson ...

Posted on Tue, 17 Dec 2019 06:12:49 -0800 by hvle

Create byte array from stream

What is the preferred way to create a byte array from an input stream? This is my current solution using. NET 3.5. Stream s; byte[] b; using (BinaryReader br = new BinaryReader(s)) { b = br.ReadBytes((int)s.Length); } Is it still a better idea to read and write blocks of streams? #1st floor You can even make it more beautifu ...

Posted on Tue, 17 Dec 2019 05:02:31 -0800 by phpform08

Send email in. NET via Gmail

Instead of relying on the host to send email, I'm thinking about using my Gmail account to send email. These emails are personalized to the band I played in the show. Is it possible? #1st floor This is an email with attachments. Source: http : //coding-issues.blogspot.in/2012/11/sending-email-with-attachments-from-c.html using Syst ...

Posted on Tue, 17 Dec 2019 02:07:10 -0800 by Dev

Introduction to Java Compiler API

Today, I'm sharing an introduction to the Java compiler API. Part of this article is from the Learning Notes of Excellent Lessons. Java Compiler API The Java compiler API is part of a Java module called java.compiler.This module includes language model and comment processing, as well as compiler APIs.It defines the types and model declarations ...

Posted on Mon, 16 Dec 2019 20:42:18 -0800 by Dollar

Qt Writing Security Video Monitoring System 14-Local Playback

1. Preface In the previous article, the video file is stored, and the user needs to provide an interface to query the video file for playback. In fact, this playback is to play the video file stored in history, not something tall. There are three kinds of video playback in this system. The first is to play back the local video file stored in th ...

Posted on Mon, 16 Dec 2019 18:02:12 -0800 by spambadger

Docker Cross Host Network - overlay

1. Docker cross-host communication Docker cross-host network scenarios include: docker's native overlay and macvlan.Third-party solutions: Common ones include flannel, weave, and calico.Docker integrates the above solutions with docker through libnetwork and CNM. The libnetwork is the docker container network library. The core content is the C ...

Posted on Mon, 16 Dec 2019 17:16:36 -0800 by slobodnium

Explain a complex and dynamic custom drawing with your hands

Introduction Custom View is an important part of android's advanced UI knowledge system.It is also a watershed that distinguishes middle and advanced developers.Advanced developers have a well-developed knowledge system, but they always offer solutions for the special effects that can be described in language.However, due to limited vision, m ...

Posted on Mon, 16 Dec 2019 14:15:38 -0800 by abakash

Cluster building of kafka1.1.0

Kafka 1.1.0 cluster building (kafka_2.11-1.1.0) zookeeper-3.4.6 kafka_2.11-1.1.0 zookeeper-3.4.6 installation Extract the file zookeeper-3.4.6.tar.gz to the directory / data/zookeeper, and modify the configuration file zoo.cfg wget http://www.apache.org/dist/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz tar -zxvf zook ...

Posted on Mon, 16 Dec 2019 13:38:54 -0800 by cyberlew15

photoshop-v.1.0.1 source code analysis Part 2 - ExportInterface.p

photoshop-v.1.0.1 source code analysis Part 2 - ExportInterface.p General Preview Statement: the source code AcquireInterface.p is almost the same as the AcquireInterface.p analyzed before. Just a few more sentences. So the syntax explanation and structure preview are not analyzed.I. source code Preview II. Grammatical inter ...

Posted on Mon, 16 Dec 2019 13:31:47 -0800 by Svoboda