Part 3 of Java 9 series - the same Jar supports multiple JDK versions
I plan to write a series of articles about Java 9 in the following period of time. Although Java 9 is not the core Java version like Java 8 or Java 11, there are still many features worthy of attention. I look forward to your attention. I will write java 9 into a series of articles, about ten.
java9 Article 1 - you can define private methods ...
Posted by Marqis on Wed, 11 May 2022 09:34:42 +0300
Java 9 Series Part 7: Java util. Optional optimization and enhancement
I plan to write a series of articles about Java 9 in the following period of time. Although Java 9 is not the core Java version like Java 8 or Java 11, there are still many features worthy of attention. I hope you can pay attention to me. I will write java 9 into a series of articles, about ten, and this article is the seventh.
java9 series ar ...
Posted by Takuma on Wed, 11 May 2022 08:12:30 +0300
Use of Spring exception handler
Global exception handling using enhanced ControllerThe so-called enhanced Controller is the @ ControllerAdvice annotation. Some annotations of the methods in the class with this annotation will be applied to all controllers, including the @ ExceptionHandler annotation.So you can write a global exception handling class:
/**
* Created by 47
* ...
Posted by roel_v on Wed, 11 May 2022 02:39:57 +0300
MyBatis learning notes (including SSM integration and reverse engineering)
1. Introduction to mybatis
1.1 what is MyBatis?
MyBatis official website
MyBatis is an excellent persistence layer framework that supports common SQL queries, stored procedures and advanced mapping. MyBatis eliminates almost all the manual setting of JDBC code and parameters and the retrieval of result sets. MyBatis uses simple XML or ann ...
Posted by kyme on Tue, 10 May 2022 16:23:56 +0300
The difference between log4j and slf4j
log4j Log4j is an open source project of Apache. We can control log information through it. The output destination is console and file Usually in log4j Properties in configuration Function: control the format and process of each log output
Configuration details:
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
...
Posted by nikifi on Tue, 10 May 2022 15:48:02 +0300
Learn spring MVC notes
configuration file mvc:default-servlet-handler/ mvc:annotation-driven/
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springfram ...
Posted by SteveMT on Tue, 10 May 2022 15:08:48 +0300
SSM framework: SSM integration case
Integrated thinking
Step 1: build an integrated environment Step 2: build a Spring development environment Step 3: integrate Spring MVC with Spring Step 4: integrate Mybatis with Spring We first configure each framework to ensure that each framework can be executed separately, and then carry out the integration operation.
Integrated environme ...
Posted by eyegraphix on Tue, 10 May 2022 12:13:18 +0300
Spring aspect oriented AOP
1, Dynamic agent
1. Export mode
Code confusion: after more and more non business requirements (logging, verification, etc.) are added, the original business methods expand sharply Each method must take into account many other concerns while dealing with the core logic
Code dispersion: take the log requirement as an example. In order to m ...
Posted by Bad HAL 9000 on Mon, 09 May 2022 23:03:52 +0300
springboot custom Cache @ Cache
Statement:
If the article is inappropriate, please summarize it for your own reference.
The source code of this article has been uploaded to Baidu online disk.
Link: https://pan.baidu.com/s/1lS6Ff6gZFk6mirEagP-rcQ
Extraction code: ric4
Spring Boot is a new framework provided by pivot team. It is designed to simplify the initial const ...
Posted by jacko_162 on Mon, 09 May 2022 15:19:03 +0300
Spring AOP dynamic proxy
Source: Liao Xuefeng's official website
In AOP programming, we often encounter the following concepts:
Aspect: aspect, that is, a function across multiple core logic, or system concern;
Joinpoint: connection point, which defines where to insert the execution of the aspect in the application process;
Pointcut: entry point, that is, a set of con ...
Posted by BRUUUCE on Mon, 09 May 2022 11:11:16 +0300