Three ways of querying hibernate

There are three main query modes common to hibernate: HQL, QBC (named query), and using native SQL query (SqlQuery) HQL Query * HQL (Hibernate Query Language) provides a rich and flexible way of querying, and using HQL for querying is also Hibernate's official recommended way of querying. * HQL is very similar in syntax structure to ...

Added by schoi on Fri, 10 Jul 2020 18:19:06 +0300

use Chart.js Draw a gradient curve, show the coordinates of a point, step through a pit

The requirement is that you have a series of data that you write to death in the JS and use these data points to draw a line graph.The interface is then called to get the data for a point (only the transverse coordinates), which is represented on the line graph and displayed as the point data (tooltip). First look at t ...

Added by binarymonkey on Thu, 09 Jul 2020 17:41:57 +0300

XML Configuration for AOP

Basic usage steps Imagine a scenario where there is a business layer for saving and updating accounts and deleting them, but what do I do when I print logs for saving, updating, and so on? If we add code directly to the business tier, it's equivalent to adding code that doesn't matter.So here you can ...

Added by stevegg1965 on Mon, 29 Jun 2020 19:52:45 +0300

Notes on the development of peripheral driver library 9: SHT1x series temperature and humidity sensor driver

In our products, we often need to test the temperature and humidity data. There are many methods and modules to detect temperature and humidity, among which SHT1x series temperature and humidity sensor is a low cost and easy to use temperature and humidity detection module. Let's talk about how to re ...

Added by Rithiur on Sat, 27 Jun 2020 10:18:00 +0300

Change the password of Apache ActiveMQ

Related abbreviation abbreviation explain MQ In this article, we specifically refer to Apache ActiveMQ $ACTIVEMQ_HOME MQ installation directory Modify the console login password of MQ Since MQ is started in the jetty container, you only need to change the following two places to change the ...

Added by vito336 on Sat, 27 Jun 2020 09:32:42 +0300

GO Manual Processing of TCP Packets

Application Scenarios Use custom communication protocol in most TCP communication scenarios image.png Sticky Packet Processing Principle: Buffer data sent by clients N times into a single packet by the size of the packet in the request header For example: Request header takes up 3 bytes (instruction header 1 byte, packet length 2 bytes), ...

Added by kellerkind on Fri, 26 Jun 2020 19:08:50 +0300

Basic method of data mining - probability and Statistics - 3. Common distribution and hypothesis test

1.1 common distribution distribution Probability or probability density Mean E(X) Variance D(X) Binomial distribution P(X=x)=Cnxpxqn−x P(X=x) = C_n^x p^x q^{n-x} P(X=x)=Cnx​pxqn−x npnpnp np(1−p)np(1-p)np(1−p) Poisson distribution P{X=i}=e−λλii! P\lbrace X= i \rbrace = e^{-λ} \frac{λ^i}{i!} P{ ...

Added by veluit06 on Fri, 26 Jun 2020 05:41:14 +0300

TypeScript self study - Chapter 4: classes

class Let's see the use of classes class Greeter { greeting: string; constructor(message: string) { this.greeting = message; } greet() { return "Hello, " + this.greeting; } } let greeter = new Greeter("world"); There are three parts: a property called greeting, a constructor, and a greet method. inherit class Animal { ...

Added by ronald29x on Thu, 25 Jun 2020 15:20:30 +0300

Fundamentals of Java EasyExcel - Reading

preface Always believe that good things are about to happen background Some time ago, I encountered such a problem when crawling the website data. There is a data source. Because of the large amount of data, it is not displayed on the page, only a download button is provided. Now it is necessar ...

Added by pipe_girl on Thu, 25 Jun 2020 13:20:40 +0300

Android Color Context Menu

What is the Android process context? It is the interface for global information about the application environment. This is an abstract class provided by the Android system. It allows access to application-specific resources and classes and calls to application-level operations such as launch act ...

Added by Zetusko on Thu, 25 Jun 2020 05:02:24 +0300