Java
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Object oriented java learning
0x00 Preface I talked about some basic syntax of Java. Here is the core idea of Java, object-oriented. 0x01 object ori…… -
Java string handler summary
String class Simple string splicing String length Splits a string into an array of characters Gets the character at th…… -
JNDI injection for Java Security
JNDI injection for Java Security Article launch: JNDI injection for Java Security 0x00 Preface Continue with the previ…… -
Swing GUI programming for java learning
Swing GUI programming for java learning 0x00 Preface The previously used GUI is implemented based on AWT, but AWT is r…… -
Introduction to spring MVC for java learning
Introduction to spring MVC for java learning 0x00 Preface The two frameworks of SSM, mybatis and spring, were written …… -
Common collections1 analysis of Java Security (1)
Common collections1 analysis of Java Security (1) 0x00 Preface In the CC chain, the specific implementation process is…… -
Fundamentals of mybatis framework for java learning
0x00 Preface Continue the introduction of the previous article and continue the content of mark mybatis. The previous …… -
Probe into integer caused by an integer interview question
Interview questions: 1. It's mentioned in the title. It's jdk1 5 environment. OK, let's create a new project, create a…… -
Tomcat startup project reports an error Java lang.OutOfMemoryError: Java heap space
Recently, when deploying a web project using MyEclipse and starting tomcat, an error is reported: Solution: add config…… -
Integration of Tomcat and Apache server under Windows system
Note: This article is a successful real experiment in reading. The book mentioned the incompatibility of different ver…… -
How to find the implementation class of the mybatis mapper interface – source code analysis
Keywords: mybatis principle, source code, mybatis mapper interface implementation class, proxy mode, dynamic proxy, Ja…… -
How to find your favorite girlfriend with java8 stream API
The traditional Java collection operation is a little verbose. When we need to filter and sort the combined elements, …… -
Java generics, understanding these is enough.
Contents of this document: 1、 What are Java generics? 2、 Common generic writing examples Generic class definition: D…… -
Use and comparison of countdownlatch and cyclicbarrier in Java
Countdownlatch and cyclicbarrier are both Java 1 5 began to introduce a tool used in multithreaded programming. They h…… -
Cookie instance, understanding cookies
1、 Understand what cookies are in one sentence Cookies are small documents sent by the server to the client to record…… -
ThreadLocal detailed explanation, ThreadLocal source code analysis, ThreadLocal diagram
This article is about: Concept explanation ----- principle illustration ----- source code analysis ----- thought arran…… -
Java generates compressed packages, and zipoutputstream is used
Case: obtain network resources a, B and C according to the URL, and put resources a and C together to generate a XXX z…… -
Introduction principle and practice of spring security
In web application development, security is undoubtedly very important. Choosing spring security to protect web applic…… -
Factorization using tail recursion
Usually, when calculating the factorial of a number, we will use the recursive algorithm. The recursive book program c…… -
Using scheduled tasks in spring projects
When we want to execute some business methods at a certain point in time, we use timed tasks. It is very simple to use…… -
BF algorithm
BF algorithm, short for brute force algorithm. Used to detect whether a string is a substring of another string. Conce…… -
Spring source code analysis – 1 – start
Spring source code analysis - 1 - start @ h_ 403_ 1 @ when using spring in web projects, we will Add the following con…… -
Dependency, association, aggregation, combination
Excerpt from: http://www.iteye.com/topic/632059 rely on It can be simply understood that one class a uses another clas…… -
Java mail
We have used many emails, QQ, 163, Netease, etc. 1、 SMTP protocol should be followed when sending e-mail, and POP3 pr…… -
As you know, Java singleton mode is not singleton mode
When we search the singleton mode, we can see many examples, such as lazy and hungry, as follows: When we write a main…… -
java. lang.NoSuchMethodError: javax. servlet. ServletContext. getContextPath()Ljava/lang/String;
Problem Description: in eclipse 3 This error always occurs when starting Tomcat6 in 7, java. lang.NoSuchMeth…… -
18 ID number verification methods for China’s residents, Java algorithm implementation
public static boolean validate18Idcard(String idcard){ if(idcard == null ) { return false; …… -
Problems caused by cookies containing Chinese
On Friday, after the project test was completed and there was no problem, it went online. After going online, it was f…… -
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HTTP 403, Tomcat configures HTTPS, unable to access, return status code HTTP 403
In order to access the application started by the local machine (Windows system) in the form of HTTPS, after generatin…… -
Loading of Java classes
Keyworked Java class loading, class loading mechanism, classloader, parent delegation model, parent delegation model W…… -
Java uses zxing to generate QR code bar code
1、 Add the Maven dependency of zxing, or download the zxing jar package This example uses zxing3 Version 2.0 Maven de……