Spring Boot uses JSR303 to implement parameter validation

The article begins with the official account of "Guo Guo Guo". Address: http://blog.itwolfed.com/blog/97 brief introduction JSR-303 is a sub specification of JAVA EE 6, called Bean Validation. At any time, when you want to deal with the business logic of an application, data validation is something you must consider and face. The ap ...

Posted on Mon, 18 May 2020 23:42:45 -0400 by TobesC

[5min +] beautify API and package the returned results of AspNetCore

Series introduction [five minute dotnet] is a blog series that uses your fragmented time to learn and enrich. net knowledge. It contains all aspects that may be involved in the. net system, such as the small details of C, AspnetCore, and. net knowledge in microservices. In this article, you will Get: Automatically wrap the data returned by ...

Posted on Sat, 16 May 2020 03:05:41 -0400 by gavinandresen

Master the types of TS tools, so that you can develop with half the effort

1, Type alias TypeScript provides a convenient syntax for setting aliases for type annotations. You can use type SomeName = someValidTypeAnnotation to create aliases, such as: type Pet = 'cat' | 'dog'; let pet: Pet; pet = 'cat'; // Ok pet = 'dog'; // Ok pet = 'zebra'; // Compiler error   2, Basic knowledge In order to better underst ...

Posted on Sat, 16 May 2020 00:32:42 -0400 by sickness01

C ා data operation series - 6 EF Core configuration mapping

0. Preface In the introduction to C ා data operation series - 5. EF Core, we simply demonstrate the functions of EF addition, deletion, modification and query through two classes. Careful partners may have looked at the generated DDL SQL statements and found some clues in them. Those who don't look are not in a hurry, so post them. public class ...

Posted on Fri, 15 May 2020 09:44:19 -0400 by mrvijayakumar

Flink Time Semantics and Watermarks

Article Directory 1. Time Semantics in Flink 2. Introduction of EventTime 3. Watermark (Water Level) 3.1 Basic concepts Features of 3.2 watermark 3.3 Transfer of watermarks 3.4 Introduction of Watermark Assigner with periodic watermarks Assigner with punctuated watermarks IV. Use of EvnetTime in ...

Posted on Thu, 14 May 2020 12:25:44 -0400 by Trevors

Three ways of Java dependency injection

Spring implements IOC (inversion of control) through DI (dependency injection). There are three common injection methods: construction method injection, setter injection and annotation based injection. Construction method injectionConstructor injection: ensures that some necessary properties are set when the bean is instantiated, and that the b ...

Posted on Thu, 14 May 2020 05:49:15 -0400 by woodplease

Application of.NET Attribute in Data Verification

The concept of Attribute is not redundant here, and I believe developers with a bit of a.NET foundation understand that there are not a few people who have used Attribute, since many frameworks provide custom attributes, such as JsonProperty, JsonIgnore, and so on, in Newtonsoft.JSON. Custom Features The.NET framework allows you to create custo ...

Posted on Tue, 12 May 2020 13:27:16 -0400 by cjbeck71081

Don't look for it. Answer the life cycle of Bean in Spring. Here's a summary for you

The life cycle of Bean in ApplicationContext Here's a picture:   You must have been blinded to see this picture. Don't worry, I'll explain it slowly: from getBean( )To trigger points, the Spring container's Bean life cycle has gone through the life cycle in the figure, which is divided into two classes: The three steps of the green arrow and ...

Posted on Tue, 12 May 2020 05:48:07 -0400 by widox

Analyze the sales data of hospital drugstores and see what amazing findings can be found in Python data analysis results

preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Generally speaking, the basic process of data analysis includes the following steps:   1. Ask ...

Posted on Tue, 12 May 2020 03:52:20 -0400 by BIOSTALL

Principles of ConditionalOnClass annotations in SpringBoot

The auto-configuration classes in SpringBoot have many ConditionalOnClass annotations, and @ConditionalOnClass matches when all classes in the annotation value exist (by trying to load the specified class using the class loader), What are the principles of these ConditionalOnClass annotations? Before you can understand the principles of the Con ...

Posted on Tue, 12 May 2020 03:50:18 -0400 by I Am Chris