Java
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Classification module of Java Web Book Mall Design (2)
This article is brief and mainly introduces the classification module in Java Web Book Mall. The specific contents are…… -
MyEclipse8. 6. How to solve the problem that there is no small m logo on the icon of Maven project for the first time
myeclipse8. 6. After importing Maven project, it is recognized as an ordinary java project, that is, there is no small…… -
How to use embedded MySQL in Java
This document mainly introduces the use of embedded MySQL in Java. For some application projects, it is necessary to p…… -
A practical example of exporting word with freemaker in Java
In a recent project, I had to export word documents for a long time. I found that it was more convenient and easy to u…… -
Eclipse installation SVN online plug-in tutorial
Eclipse installs the online plug-in for SVN Svn is very helpful for developing Java language with eclipse. Different p…… -
Summary of three rounding functions in Java
As follows: 1. Rounding off decimals: math floor(3.5)=3 2. Rounding: math rint(3.5)=4 3. Rounding: math ceil(3.1)=4 Th…… -
A simple example of Java reading and writing txt files
When writing Java programs, we often encounter the situation of reading TXT or writing txt files. However, because we …… -
Mybatis quick start (simple and easy to understand)
1、 Introduction to mybatis Mybatis is an excellent persistence layer framework that supports common SQL queries, stor…… -
java_ Timestamp and date_ Mutual conversion implementation code
1. Definition of timestamp Timestamp refers to the creation, modification and access time in file attributes. Digital …… -
Java web development is the perfect solution to prevent multiple users from logging in repeatedly
At present, in many web projects, the same account information can be logged in at different login portals, which is n…… -
Explain the use example of Java based on mybatis
Mybatis, formerly known as ibatis, was originally an open source project of Apache. In 2010, the project was migrated …… -
Java array, remove duplicate values, add and delete array elements
As follows: Console results: The above is the Java array brought by Xiaobian. The methods of removing duplicate values…… -
Explore those modifiers in the Java language
I Some modifiers provided in Java can modify classes, variables and methods. Common modifiers in Java include abstract…… -
Explain the difference between Java overloading and overriding
Many students don't know the difference between overload and override. It is recommended not to memorize conceptual kn…… -
Java can efficiently judge whether there is a detailed explanation of an element in the array
1、 Method to check whether the array contains a value Use list Use set Use circular judgment Use arrays binarySearch(…… -
On the differences of three rounding functions in math class in Java
Three rounding functions in math class 1.ceil 2.floor 3.round In fact, the three rounding functions are quite simple A…… -
Implementation of fuzzy query in Java list
For example, I have the following list, which stores multiple employee objects. Then I want to perform a fuzzy query o…… -
Three ways to realize java multithreading are explained in detail
Recently, I learned and studied the use of Java multithreading when doing code optimization. After reading the opinion…… -
Code analysis of upload and background file legitimacy verification
Background upload method File validity verification class Front end upload JS The above is the code analysis of upload…… -
Java uses POI to import and export excel table sample code
introduce Jakarta POI is a set of Java APIs for accessing documents in Microsoft format. Jakarta POI consists of many …… -
Implementation of infinite level tree structure method in Java and JS (similar to recursion)
JS: java: The above tree structure method (similar to recursion) for realizing infinite levels in Java and JS is all t…… -
POI reading of Excel custom date format (example code)
Reading Excel data with POI: (version No.: poi3.7) @H_ 404_ 4@1 , read Excel @H_ 404_ 4 @ 2. Excel data processing: Th…… -
Eclipse exports executable java project / executable jar files (including third-party jar packages)
Eclipse exports executable java project / executable jar files (including third-party jar packages) Elder martial brot…… -
Teach you to easily make java music player
1、 Implementation principle of music player The multimedia function of javase is very weak, so there is a plug-in ded…… -
Regexutils. Java regular expression validation tool class java
Regular expressions are often used to verify various forms. Java forms register common regular expression verification…… -
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Blob (binary large object), a binary large object, is a container that can store binary files. In the computer, blob i…… -
Java sending httpclient request and receiving request result
I 1. Write an httprequestutils tool class, including post request and get request 2. Write business code and send HTTP…… -
JavaWeb can only log in at one place at a time with the same account (similar to QQ login function)
JavaWeb realizes that one account can only log in at one place at a time (similar to QQ login function). The implement…… -
Shopping Cart module of Java Web Book Mall Design (3)
This article continues to share the shopping cart module in Java Web Book Mall for your reference. The specific conten…… -
Summary and difference between JDBC transaction and JTA distributed transaction in Java
There are three types of Java transactions: JDBC transactions, JTA (Java transaction API) transactions, and container …… -
POI reading of Excel custom date format (example code)
Reading Excel data with POI: (version No.: poi3.7) @H_ 404_ 4@1 , read Excel @H_ 404_ 4 @ 2. Excel data processing: Th…… -
Summary and solution of garbled code in Java
Garbled code in Java In recent projects, we often encounter the problem of garbled code in Java, so we took time to so……