Recent Posts
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Detailed explanation of Java layering concept
Service is the business layer The action layer acts as the controller Dao (data access object) data access 1. What is …… -
Java read and write parquet format data example code
This paper introduces how to read and write parquet data in Java and share it with you, as follows: Talk about the sch…… -
Itemxt generates PDF and sets an example of header and footer
Itemxt generates PDF and sets an example of header and footer Example code: Engineering structure drawing: If you have…… -
Performance comparison of Java template engine
From GitHub to JSP, thymeleaf 3, velocity 1.7, FreeMarker 2.3 23 comparing the performance of several mainstream templ…… -
General steps of sending email in Java (example explanation)
General steps of sending email in Java 1、 Import the jar package of JavaMail: 2、 Create a test class to write the ma…… -
Analysis and solution of faults caused by the same bean ID in spring
preface Recently, a colleague's bean configuration problem caused the production environment to write a large amount o…… -
Detailed explanation of Java data structures and algorithms (ordered array and binary search)
1、 Overview Binary search is often used in ordered arrays, which can improve the speed of search. Today, we use seque…… -
Adapter pattern of design pattern in Java
Adapter pattern of design pattern in Java preface: The adapter pattern can apply a class or interface to another diffe…… -
Spring cloud and distributed system
This article is not a tutorial on how to use spring cloud, but discusses what spring cloud is, and the background and …… -
Implementation steps of sending SMS in Java
1、 Registering users in China Netcom: This program is implemented through the SMS platform provided by China Netcom. …… -
Struts 2 development process and detailed configuration
1： Struts development steps: 1. Web project, introduce struts - jar package 2. web. The core function of struts is in…… -
Setting up spring security environment
At present, spring officially only provides Maven download methods. But in http://maven.springframework.org There are …… -
Detailed explanation of spring boot JPA data deletion and transaction management
Today we'll introduce some pitfalls of JPA deletion and transaction. Let's take a look at the details. Business scenar…… -
Java spring annotation configuration bean instance code parsing
The previous articles all use XML to configure beans. If there are hundreds of beans, this is unimaginable. Therefore,…… -
Details of spring transaction propagation properties and isolation levels
1 propagation attribute of transaction 1) Required, this is the default attribute Support a current transaction,create…… -
Reentry lock and read-write lock in Java Concurrent Programming
Reentry lock Reentry lock, as its name suggests, is a lock that supports reentry. It means that the lock can support r…… -
Java method of uploading and downloading files through httpurlconnection
This paper introduces the method of uploading and downloading files through httpurlconnection in Java and shares it wi…… -
On local and global variables in Java
This paper introduces the local variables and global variables in Java as follows: 1. Local variables: Definition of l…… -
Explain in detail how to use Maven to build a multi module project (picture and text)
Maven multi module project is applicable to some large projects. Through reasonable module splitting, code reuse is re…… -
Solution to the problem of java thread deadlock
Solution to the problem of java thread deadlock [thread deadlock] Reason: two threads wait for resources locked by eac…… -
Detailed examples of Java custom exception classes
Detailed examples of Java custom exception classes Why write your own exception class? If there is no exception provid…… -
Implementation of multi condition query of mongodb with Java
Requirement: in the mongdb client, we can easily implement multi condition query, so how to implement it when using ja…… -
Spring’s programmatic and declarative transactions
Entrance (understand some basic concepts) Spring transaction properties (what are the properties of transactions?) We …… -
Java method example of sending HTTP request through httpclient
Introduction to httpclient Httpclient is not a browser. It is a client HTTP communication implementation library. The …… -
Comparison of object placement arrangement between Java and C + +
Comparison of object placement arrangement between Java and C + + Summary: In Java, all objects are stored in the heap…… -
Inheritance and abstract code examples of beans in spring
When we apply spring, we must use abstract classes in general design. How to configure these abstract beans in spring.…… -
Explain the mutex semaphore and multithreading waiting mechanism in Java
Mutex and semaphore are the basic concepts designed for concurrent programming in the operating system. The difference…… -
Detailed explanation of merge sorting algorithm in Java
Detailed explanation of merge sorting algorithm in Java Merge sorting algorithm, as its name suggests, is an algorithm…… -
Java array expansion code example
In the process of writing programs, we often encounter that the array space is not enough. For example, I have initial…… -
In depth understanding of spring MVC data transformation
This article mainly introduces the relevant contents of spring MVC data conversion for your reference and learning. Le…… -
Ratelimiter source code analysis
As the saying goes, caching, current limiting and degradation are the three sharp swords of the system. When exporting…… -
Detailed examples of Java design pattern (DAO)
Detailed examples of Java design pattern (DAO) Application scenario: in Java programs, it is often necessary to persis……