Java
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Explain in detail how Java obtains the file encoding format
1: Simply judge whether it is UTF-8 or not. Because it is generally GBK except UTF-8, it is set to GBK by default@ H_ …… -
Detailed explanation of encryption and decryption function implemented by Java based on DES symmetric encryption algorithm
This paper describes the encryption and decryption function of Java based on DES symmetric encryption algorithm. Share…… -
Detailed explanation of Java backend to realize unified code scanning payment: wechat
Recently I finished a project and just had nothing to do. The product manager arranged a task for me. Make a function …… -
Detailed explanation and examples of Java statement block
Java statement block I still remember when I first read the programming books of C, C + + and Java, there was an intro…… -
Java encryption and decryption function example based on AES symmetric encryption algorithm
This paper describes the encryption and decryption function of Java based on AES symmetric encryption algorithm. Share…… -
Detailed explanation of three methods of converting list into map in Java
Detailed explanation of three methods of converting list into map in Java In this article, we introduce three methods …… -
Detailed explanation of symmetric encryption using Java (DES, 3DES, AES)
There are two sentences: 1) Algorithms and data structures are an important part of programming. If you lose algorithm…… -
Deep understanding of spring multi data source configuration
We often encounter the problem of multiple data sources in projects, especially in projects such as data synchronizati…… -
Java decimal to binary, octal, hexadecimal string
Decimal to binary class DecToBin { public static void main(String[] args) { //System.out.println("Hello Worl…… -
Collection of Java interview questions and answers (122 basic questions and 19 code questions)
A collection of java basic interview questions and answers (122 basic questions and 19 code questions). The details ar…… -
Detailed explanation of Java chart class library
abstract In the development of background sites using Java, chart and report functions are indispensable. This paper r…… -
Explain in detail the simple addition, deletion and modification through JDBC (take MySQL as an example)
Foreword: what is JDBC Java database connectivity (JDBC) is an application program interface used in the Java language…… -
Java implementation traverses all files under the folder (recursive call and non recursive call)
Java traverses all files under the folder (recursive call and non recursive call) 1. Do not use recursive method calls…… -
Example code of Excel file upload and download based on spring MVC
Recently, I encountered a demand. I need to download the excel template, upload it for analysis and store it in the da…… -
Introduction and wonderful use of absolute value function in Java
1、 Instructions for absolute value function The absolute value function is math in JDK Java implementation method, wh…… -
Summary of six principles and one rule of java object-oriented
1. Single responsibility principle: one kind only does what it should do. 2. Richter substitution principle: a subclas…… -
Several algorithms of Java symmetric encryption are implemented respectively
Java symmetric encryption is implemented using DES / 3DES / AES algorithms There are two sentences: 1) Algorithms and …… -
Delete element instance code in linked list of Java data structure
Java delete elements in linked list The following example demonstrates using the clear() method to delete elements in …… -
Summary of six principles and one rule of java object-oriented
1. Single responsibility principle: one kind only does what it should do. 2. Richter substitution principle: a subclas…… -
Java sorts list collections sort()
Sort the objects in a collection, and sort them in ascending or descending order according to the size of an indicator…… -
Explain in detail that the Java client can’t link to the redis solution
Problem Description: 1.Could not get a resource from the pool,Connection refused: connect The windows java client link…… -
Detailed explanation of XML configuration in mybatis
Mybatis commonly uses XML configurations with caching disabled Mybatis is fully configured as follows: Mybatis officia…… -
JDBC connection to Oracle database function example
This paper describes the function of JDBC linking Oracle database. Share with you for your reference, as follows: I ho…… -
Detailed introduction and summary of java reflection mechanism knowledge
This article will describe the knowledge of reflection from the following aspects: 1、 What is a class In the object-o…… -
Example of conversion between JSON and objects and collections
Conversion of JSON string and Java Object [JSON lib] During the development process, it is often necessary to exchange…… -
Example of AES secret key generation algorithm implemented in Java
This paper describes the AES secret key generation algorithm implemented in Java. Share with you for your reference, a…… -
Java JDBC connection and use details
Java JDBC connection and use jdbc Import driver //Jar is a packaged set of class files that can be referenced in other…… -
The most complete usage summary of for loop, a new feature of Java
1. Overview of enhancements Enhanced for loop, also known as foreach loop, is used to traverse arrays and containers (…… -
JAVA memory structure and data type
JAVA memory structure Memory is a temporary storage of data. Its storage speed is very fast, but it is temporary stora…… -
Detailed explanation of the difference between Java array and ArrayList
The difference between Java array and ArrayList 1) Incisive exposition: You can think of ArrayList as an "array that a…… -
Redis of Java (spring data redis integration)
1. Integrate with spring data redis POM used in the project xml： Except for the log part, there is only one spring co…… -
Instance resolves the Java date format tool class dateutil java
If you don't have much to say, please see the code: DateUtil. java Test use DateUtilTester. java The above is the whol……