Java
-
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…… -
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…… -
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…… -
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 …… -
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…… -
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…… -
Deep analysis of Java disassembly box
Let's start with a code: Guess what? Many people will think that the results are all true, but that's not the case tru…… -
Deep understanding of spring AOP
I preface In previous projects, I seldom paid attention to the specific implementation and theory of spring AOP. I jus…… -
Java IO is an example of computer search and deletion
I Recursive method @ h_ 301_ 4@ 1. Recursion is to call its own method on the premise that there is a method. 2. Recur…… -
Play spring boot with angularjs and JDBC (4)
Refer to official examples: http://spring.io/guides/gs/relational-data-access/ -
Solve the problem of Java Lang.exceptionininitializererror error problem
Solve the problem of Java Lang.exceptionininitializererror error problem Start a project today An error is reported wh…… -
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 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 …… -
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 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…… -
Java decimal to binary, octal, hexadecimal string
Decimal to binary class DecToBin { public static void main(String[] args) { //System.out.println("Hello Worl…… -
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…… -
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…… -
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…… -
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 …… -
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 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…… -
Calculates the maximum public substring of two strings
background There has been little application of algorithms. Recently, I saw some typical algorithms and wanted to prac…… -
Composite of Java design patterns
summary It is a structural mode, which organizes objects in a tree structure to represent the "part whole" hierarchy, …… -
Detailed introduction and simple example of Java base64encoder
Detailed explanation of Java base64encoder Base64 is one of the most common encoding methods for transmitting 8bit byt…… -
Analysis on the method of operating bytecode in Java bytecode framework ASM
We have introduced ASM in detail before. If you need it, you can click here: in depth study of Java bytecode framework…… -
Explain in detail the Chinese garbled code problem of JSON data returned by spring mvc3 and solve it
After checking some information on the Internet, I feel more complicated. Here, I use two very simple methods to solve…… -
Java thread explanation and the difference between thread and process
@H_ 419_ 1@java Thread explanation and the difference between thread and process @H_ 419_ 1@1. Process and thread Each…… -
Java determines whether two objects are the same object instance code
Java determines whether two objects are the same object Reference addresses are compared with "= =" and values are com…… -
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…… -
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…… -
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……