Tear spring and spring MVC parent-child containers by hand
1, Background
Spring and spring MVC have a parent-child container relationship, and it is precisely because of this that the problem of package scanning often occurs. Here we analyze and understand the parent-child container relationship between spring and spring MVC, and give the official recommended method of package scanning in spring and sp ...
Posted by piyushsharmajec on Tue, 24 May 2022 03:28:59 +0300
The teacher has sent something, you have to queue up to receive it, Java synchronized keyword
When I was a child, when the teacher sent something, he asked us to line up one by one not to grab it, or we would get spanked.
This scenario of multiple people queuing up to receive things is very similar to the scenario in which multiple threads access shared resources in programming. Today we combine the Java synchronized keyword to explain. ...
Posted by eastcoastdubs on Tue, 24 May 2022 03:06:35 +0300
Simplify RESTful development, Spring Data REST allows you to reduce hair loss
1 Preface
Welcome to visit Pumpkin speak slowly www.pkslow.com com Get more wonderful articles!
preface
Springboot + Spring MVC greatly simplifies the RESTful development of Web applications, while Spring Data REST is simpler. Spring Data REST is built on the Data Repository. It can directly expose the repository into Web services in HATEOAS ...
Posted by shiznatix on Tue, 24 May 2022 02:57:30 +0300
Alibaba Java troubleshooting tool list!
We often encounter many difficult problems in our daily work. While solving the problems, some tools have played a considerable role. Write it down here. First, it can be used as a note to make us forget later and can be read quickly. Second, it is to share. We hope that the students who see this article can take out the tools they feel are ver ...
Posted by gte806e on Tue, 24 May 2022 02:09:42 +0300
What are your common encryption algorithms?
Encryption algorithms can be divided into reversible encryption and irreversible encryption, and reversible encryption can be divided into symmetric encryption and asymmetric encryption.
1, Irreversible encryption
Common irreversible encryption algorithms include MD5, HMAC, SHA1, SHA-224, SHA-256, SHA-384, and SHA-512. Among them, SHA-224, SHA- ...
Posted by Fearless_Fish on Tue, 24 May 2022 01:49:38 +0300
Annotation Analysis of Java
A person's life is like an article, it can only be continuously improved after many careful revisions.
Java annotation concept understanding:
Java annotations, also known as Java annotations, are an annotation mechanism introduced by JDK5. The five familiar annotations in Java are: @Override, @Deprecated, @SuppressWarnings, @SafeVarargs, ...
Posted by sp0rk on Tue, 24 May 2022 01:39:44 +0300
volatile feature code verification
1. visibility
If the value of the variable modified by the volatile keyword changes, other threads will get it immediately, thus avoiding the situation of dirty reading.
1 public class TestVolatile {
2
3 public static void main(String[] args) {
4 MyData myData = new MyData();
5 new Thread(new Runnable() {
6 ...
Posted by XeNoMoRpH1030 on Tue, 24 May 2022 01:21:19 +0300
T, E, K, V in generics, remember?
preface Benefits of generics Wildcards in generics
Commonly used T, E, K, V,? ？ Unbounded wildcards Upper bound wildcard <? extends E> Wildcard lower bound? super E> ？ Difference between and T Class < T > and "class <? > difference Summary
preface
Java generics is a new feature introduced in JDK 5. Ge ...
Posted by jb60606 on Mon, 23 May 2022 23:59:38 +0300
day06 object oriented Basics
This learning content comes from station b: dark horse programmer
Note: I was speechless and failed to punch in. Normally, this should be the fourth day. After listening to the object-oriented part, I didn't understand it. I listened to it again. Now I feel a little on the road, but I know it's only the simplest, and there's more difficult to ...
Posted by AlanG on Mon, 23 May 2022 21:53:09 +0300
Spring IOC/AOP use and source code explanation
Spring-IOC
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Use of IOC s
Basic use of IOC
Import spring's pom configuration
<dependencies>
< ...
Posted by devxtech on Mon, 23 May 2022 21:49:15 +0300