Recent Posts
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Java multithreading – thread synchronization and locking
1、 Synchronization issues raised Thread synchronization is to prevent data damage caused by multiple threads accessin…… -
Summary of Java list loop and map loop
Summary of Java list loop and map loop I made a summary of list and map. There is no technical content, so I should re…… -
What does the volatile keyword mean in Java
In java thread concurrency processing, there is a keyword volatile. At present, there is great confusion about the use…… -
Implementation and callback of second-line payment function in Java wechat code scanning payment mode
1、 Preparatory work First, WeChat make complaints about the payment system itself, but its official documents are fra…… -
Detailed explanation and example code of Java calling weather webservice
Small application of Java calling weather webservice No more nonsense, just post the code: CityReq. java WeatherWebSer…… -
In depth analysis of length and length () in Java
Before starting this article, consider the following question How to get the length of an array without using any ide …… -
Detailed explanation of the equals () and toString () methods in Java
The equals () and toString () methods in Java. Here is a small example to help you learn and understand this part of t…… -
User module of Java Web Book Mall Design (1)
This paper mainly analyzes the user module of the book mall, and the specific contents are as follows 1. User module r…… -
Method of verifying sqlmapper configuration file of mybatis using XSD (1)
Based on the refactoring of sqlsessionfactorybean, this article briefly reviews the operations: Create a new sqlsessio…… -
Three methods of Java string segmentation (summary)
Recently, I encountered a small problem in the project. A string is divided into an array, similar to string STR = "AA…… -
Implementation of bubble sorting algorithm in Java
Bubble sort: That is, two adjacent elements are compared one by one according to the index. If it is greater than / le…… -
Java string format – string Use of format()
This article introduces Java string formatting - string The usage of format() is as follows: Formatting of general typ…… -
On the use of list storing map object in S: select tag
1、XXXAction. java 2、test. JSP page The contents of the drop-down list can be displayed in the above form. The above …… -
Implementation method of Java multi-user login restriction
Recently, I was relatively idle and didn't have any projects to do, so I stroked some common problems that I would enc…… -
Summary of several writing methods of retaining two decimal places in Java
This paper lists several methods: @ h_ 419_ 5@ 1. Use Java math. BigDecimal @H_ 419_ 5@ 2. Use Java text. DecimalForma…… -
Several ways of developing web service with Java
Web service has been more and more widely used. The following describes several ways to develop web service in Java sy…… -
Solution to a configuration with this name already exists problem in eclipse
A configuration with this name already exists in Eclipse: In the as like as two peas in Eclipse development, the proje…… -
Detailed explanation of four methods of generating and parsing XML documents in Java (Introduction + comparison of advantages and disadvantages + examples)
As we all know, there are more and more methods to parse XML, but there are four mainstream methods: DOM, sax, JDOM an…… -
Dynamic update data using mybatis
When writing SQL using mybatis, you need to dynamically update the object data. The fields to be updated each time are…… -
Parsing and generating XML documents using Dom4j in Java
1、 Foreword Dom4j is an excellent Java open source API, which is mainly used to read and write XML documents. It has …… -
Java infinite tree (recursive) super utility case
As follows: The above is all about the super practical case of Java infinite tree (recursion) brought by Xiaobian. I h…… -
Sequenize common operation details and example code
Sequelize common operation demo link query Statistics Maximum or minimum insert modify delete Thank you for reading, h…… -
Sequenize common operation details and example code
Sequelize common operation demo link query Statistics Maximum or minimum insert modify delete Thank you for reading, h…… -
java. Lang. instrument agent details
java. Lang. instrument agent using java. Lang. instrument package is introduced in jdk5. Programmers can dynamically m…… -
Detailed explanation of 23 design patterns in java development (recommended)
Design patterns -- the basis of Reusable Object-Oriented Software Design pattern (design pattern) is a set of code des…… -
Parsing and generating XML documents using Dom4j in Java
1、 Foreword Dom4j is an excellent Java open source API, which is mainly used to read and write XML documents. It has …… -
Analysis of spring with ehcache instance
1 Introduction to ehcache Ehcache is a pure Java in-process caching framework, which is fast and lean. It is the defau…… -
Mybatis stored procedure, mybatis paging, mybatis one to many addition, deletion, modification and query
1、 The entity classes used are as follows: Student. java Group. Java 2、 Table structure corresponding to entity Stud…… -
Java uses regular expressions (regex) to match Chinese instance code
Only Chinese can be entered PS: let's take a look at the regular expressions to match Chinese in Java. There are two w…… -
Solve the problem that the project JDK becomes 1.5 after Maven update project
1、 Problem description Create a maven project in eclipse, and then change the JDK version to 1.7. As a result, the JD…… -
Implementation method of inserting picture into QR QR QR code
Insert picture into QR QR code QR code is finally popular. Now QR code labels on commodity advertisements in streets a…… -
Detailed explanation of the generation mode and principle of random numbers in Java
Generation mode and principle of random number in Java Consult the data related to random numbers and sort them out Fi……