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About sharding JDBC Sharding JDBC is the first product of ShardingSphere and the predecessor of ShardingSphere. It is positioned as a lightweight Java framework that provides additional services in the JDBC layer of Java. It uses the client-side direct connection database to provide services in the form of jar package, without additional deploy ...

Copyright notice: This is the original article of the blogger. It can't be reproduced without the permission of the blogger. https://blog.csdn.net/qq1010885678/article/details/43735491 Or use the previous word count example Custom Mapper class import java.io.IOException; import org.apache.h ...

In the development process of java mvc framework, we often divide the code into levels like controller (control layer), service (business layer), rpc (remote interface call layer), dao (data layer). If we print all the logs of all levels into one file, one is that the single log file is too large, and it is not convenient to view, so we conside ...

Development and operation environment: Shenzhou notebook K650D-G6D1 i5-6400 GTX950M Windows 10 professional Nginx or Apache Web server software MySQL 5.7. X database PHP7.1.0 PHPStrom 2017 PowerDesigner 16.5 Axure RP8 Prototype design drawing (recruitment application) Database table (recruitment application): recruitment application ...

Problem description issue A: after turning on the parameter (phoenix.stats.enabled=true), use Phoenix SQL to query the data, and there are duplicates (the data found is more than the actual content stored in HBase) issue B: after the parameter is closed (phoenix.stats.enabled=false), Phoenix SQL performance decreases. Environmental Science Phoe ...

I. introduce dependency <!-- xbean as<amq:connectionFactory /> -->     <dependency>         <groupId>org.apache.xbean</groupId>         <artifactId>xbean-spring</artifactId>         <version>3.16</version>     </dependency>     <dependency>         <groupId>org. ...

Thank you for your posts https://blog.csdn.net/typa01_kk/article/details/76696618 , but there are some differences. Please look down On the basis of predecessors, I write about the differences in my current version I. intellij idea version My version is as follows II. jdk version Third, the differences under the projec ...

Example 1: Solution: how to let n threads traverse the List collection with n elements in sequence import java.util.ArrayList; import java.util.List; import org.apache.commons.lang3.ArrayUtils; public class Test_4 { /** * Multithreading list * * @param data Data list * @param threadNum Thread count */ public synchronized void ha ...

1. Generate a certificate. You can use self signed certificate or obtain it from SSL certificate authority center In JDK, keytool is a certificate management tool, which can generate self signed certificates. Here, use the keytool provided by JDK to create certificate tests Open cmd window, enter command keytool -genkey -ali ...

Summary Log Service (LOG for short) is a one-stop service for LOG data, which is tempered in Alibaba group through a large number of big data scenarios. Besides operating through the management console, LOG also provides API (Application Programming Interface) to write and query LOG data, manage their own projects and LOG libraries. In the actu ...