Java
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Analysis and resolution of @ postconstruct exceptions executed many times in spring timing tasks
discover problems A function has just been modified in the project recently. The code is preparing for verification. S…… -
Analysis of implementation method of Java RSA encryption and decryption
This paper describes the implementation method of Java RSA encryption and decryption. Share with you for your referenc…… -
Detailed explanation of the life cycle of Java threads
Detailed explanation of the life cycle of Java threads For multithreaded programming, understanding the life cycle of …… -
5 code examples of concurrent processing skills
In this paper, the author summarizes five techniques for dealing with concurrent programs, and gives code examples to …… -
JDK1. 6 collection framework bug 6260652 analysis
Recently I was looking at the source code of JDK: copyonwritearraylist Java and ArrayList Java, the constructor of the…… -
How to use weakhashmap
How to use weakhashmap preface: when learning weakhashmap, I learned that if the key in the map is only referenced b…… -
Function example of exporting objects using Excel tool class in Java
This paper describes the function of exporting objects using Excel tool class in Java. Share with you for your referen…… -
Login and registration based on struts 2 and Hibernate
This example shares the login and registration functions of struts 2 and hibernate for your reference. The specific co…… -
Java improve the seventh class loader analysis
Today, we will learn about class loaders. Class loaders actually have a lot to do with the JVM. This article only brie…… -
Java super simple crawler example explanation
Crawl the data of the whole page and effectively extract information. If there are comments, there will be no nonsense…… -
Spring boot packaging war jar deployment Tomcat
summary 1. Spring boot aggregation project packaging War deployment Tomcat 2. Spring boot packages jar and runs it dir…… -
Code sharing of several loop examples in Java programming
About the content of Java loop, it is still commonly used in programming. Let's share some sample code of loop for pra…… -
Java uses the RandomAccessFile class to read and write file instance code based on pointers
The Java API provides a class that implements random access to files based on pointer operation. This class is the Ran…… -
Export the jar package that Maven project depends on (Graphic tutorial)
Note that the MVN command is an environment variable that needs to be configured for Maven 1、 Export to custom direct…… -
Open environment for Alipay under spring boot
sdk-alipay Open environment for Alipay under spring boot Usage scenario Spring boot application needs access to Alipay…… -
Related concepts of Web Service
1、 Preface We have all heard of WebService (Web Service) more or less. For a while, many computer journals, books and…… -
Java object type conversion and polymorphism (example explanation)
Object type conversion It is divided into upward transformation and downward transformation (forced object transformat…… -
Implementation of creating Java Web projects using Maven in eclipse
Implementation of creating Java Web projects using Maven in eclipse 1) Right click the blank space in the eclipse proj…… -
Analysis of Java array out of bounds
Array initialization in Java is actually the same as OC, which is divided into dynamic initialization and static initi…… -
On the API gateway service zuul in spring cloud
So far, we have introduced a lot of contents in spring cloud. We are familiar with ribbon, hystrix and feign. We also …… -
Java file upload (single file and multi file)
Java file upload (single file and multi file) 1、 Brief description In a Java Web project, the file upload function is…… -
Function example of exporting objects using Excel tool class in Java
This paper describes the function of exporting objects using Excel tool class in Java. Share with you for your referen…… -
Explain the difference between interface and abstract class in Java
Explain the difference between interface and abstract class in Java 1. Abstract class represents an inheritance re…… -
Analysis of advantages and disadvantages of IOC in spring
This article shares the advantages and disadvantages of IOC in spring for your reference. The specific contents are as…… -
Complete instance of the convenient tool class for Java implementation and operation of JSON [rewrite Google’s gson]
This article describes a convenient tool class for Java to operate JSON. Share with you for your reference, as follows…… -
Sample method of java file monitoring watchservice
summary java1. 7 provides a watchservice to monitor the changes of files in the system. The monitoring is a file syste…… -
Raspberry pie GPRS. SMS receiver
cause Once used the SMS cat from Siemens. The advantage is that there is an SDK development kit directly, and it can b…… -
Analysis and resolution of @ postconstruct exceptions executed many times in spring timing tasks
discover problems A function has just been modified in the project recently. The code is preparing for verification. S…… -
Spring boot advanced tutorial: using redis to realize session sharing
Redis is a message caching middleware and a key value storage system with rich features. Spring boot provides automati…… -
Detailed explanation of spring boot construction framework
What spring boot? Spring boot is a new framework provided by pivot team. It is designed to simplify the initial constr…… -
Java programming exception handling best practices [recommended]
Exception handling in Java is not a simple topic. It's hard for beginners to understand, and even experienced develope…… -
java. Solution to lang.exceptionininitializererror exception
Today, in the process of development, I encountered Java Lang. exceptionininitializererror exception. Baidu checked it……