Java
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Upgrade struts to 2.5.0 2 problems encountered and solutions (recommended)
The original version was 2.3 x. It needs to be upgraded to 2.5.0 for security reasons 2。 1，2.5. Version 2 no longer …… -
Using the sublist method of list in Java to page list (easy to learn)
The following is an introduction to using the sublist method of list to page list. There is no more nonsense. Just loo…… -
Java uses JDBC to build a simple data access layer example
The purpose of this tutorial is to use a separate layer written in Java to access tables in the database, which is com…… -
Java interview question — explain the difference between HashMap and hashtable in detail
I The difference between HashMap and hashtable Let's first look at the definitions of two classes It can be seen that …… -
Java cumulative sum verification implementation mode hexadecimal (recommended)
If you know a string, find the hexadecimal cumulative sum of the string. If you know a string and check code, check wh…… -
Method and example code of file download based on Java Web
Java Web implementation file download Don't use the < a > tag to download. This will open the file instead of do…… -
ASP. Net mvc5 + ef6 + easyUI background management system (81) – data filtering (universal query) example
preface Listening to the title seems to be a very complex function, but in fact it is very complex. This section will …… -
Detailed introduction to parameter transfer of functions in Java
Parameter transfer of function in Java Summary: 1. When an object (reference of an object) is passed as a parameter, a…… -
Implementation method of converting jar file into exe installation file
1. You should know whether the target file is 32-bit or 64 bit. If 32-bit is generated, you should use 32-bit JRE. If …… -
Java uses regular expressions to filter HTML tags
Some time ago, when developing, you should read the introduction of an article (that is, the first 200 characters). If…… -
Java method instance for reading and writing windows shared folders
Projects often need to access shared folders, such as shared folders to store photos, files, etc. So how to use java t…… -
An example of file upload and download realized by Java in EDI through FTP tool
Recently took over an EDI project and gained a lot. In fact, I came into contact with EDI in the first company. At the…… -
A simple use of reflection in Java
brief introduction Firstly, some impractical explanations are introduced: the java reflection mechanism is that all th…… -
struts2. 2.3+spring3. 1.0+mybatis3. 1.0 framework integration simple demo
Recently, the company wants to develop new projects and use the struts 2 + mybatis + spring framework, so after learni…… -
Realization of payment function under the first-line of Java wechat code scanning payment mode
1、 Preparatory work Countless people have come to ask about the development of mode 1, so they post it here for refer…… -
Explanation of Java ArrayList implementation example
ArrayList overview: ArrayList is implemented based on array. It is a dynamic array. Its capacity can grow automaticall…… -
Java mybatis interceptor
Many java beginners don't know much about the mybatis interceptor. Here I'll sort out the next detailed explanation of…… -
The difference between start method and run method in java thread is introduced in detail
The difference between start method and run method in thread In the thread, if the start method calls the run method i…… -
Detailed explanation of Java (enum) enumeration usage
concept Enum, the full name of enum, is a new feature introduced in JDK 1.5. In Java, the type modified by enum keywor…… -
Mybatis source code analysis (I) opening
Needless to say, mybatis has a small amount of source code and simple logic. I will write a series of articles to lear…… -
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…… -
Detailed explanation of Java hibernate objects (transient state, persistent state, off pipe state)
Java hibernate object Due to the recent learning of Java hibernate, several states of Java hibernate objects are sorte…… -
Iteration and recursion in Java
preface Recently, I saw this content when I was reading a book. I felt quite fruitful. Iteration uses a loop (for, whi…… -
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…… -
Mybatis development annotation quick start
Rapid popularization 1. What is mybatis Mybatis is an excellent persistence layer framework that supports common SQL q…… -
Detailed introduction to the extension and application of sqlmapper configuration in mybatis (1)
I struggled for several nights to debug the program, wrote several blogs, and finally established the extension mechan…… -
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…… -
Java implementation of sensitive word filtering example
Sensitive words and text filtering is an essential function of a website. It is very necessary to design a good and ef…… -
Java implementation of simple crawler today’s headlines
preface What needs to be said in advance is that due to the particularity of today's headlines, we can't directly obta…… -
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…… -
How to send mail using JavaMail to ensure success
preface I believe everyone should know that the general open API calls us will have a return value or status code to t…… -
Method for converting Java string type to boolean type
Today, I accidentally want to convert string type to boolean type. I checked the API document and found that the docum……