freemarker tag usage and configuration

After some time of research, freemarker really works better than jsp, and freemarker strictly divides the mvc pattern.Show on the page as a template filler.The following describes the use and configuration of freemarker that I experienced. Configuration tags are good for maintaining and expanding the project. Create a freemarker configuratio ...

Posted by FrankHarley on Mon, 20 Jul 2020 08:38:52 -0700

commons-lang3 tool class learning (2)

From http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/ Official documents to organize and remember for yourself 3. BooleanUtils Boolean Tool Class and(boolean...array) logic and BooleanUtils.and(true, true) = true BooleanUtils.and(false, false) = false ...

Posted by Aliz on Fri, 17 Jul 2020 08:53:21 -0700

javaSpring uses maven's initial build step java project

1. Modify in maven projectPom.xmlIntroduce dependencies on spring.<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com ...

Posted by jason102178 on Sun, 05 Jul 2020 07:40:05 -0700

Getting started with RocketMQ to ground transaction message & sequential message

Next: RocketMQ entry to earth (1) novice can also understand the principle and actual combat! 1, Origin of transaction message 1. Case study Quoting official shopping cases: At the same time, you need to add 100 points to the downstream account to ensure that 100 yuan will be deducted from the system. Account system and points system are two in ...

Posted by cyberdwarf on Mon, 29 Jun 2020 19:54:31 -0700

Eclipse configures hadoop development environment

Hadoop stepping on the pit (3) Eclipse configures hadoop development environment Environmental Science windows 10 java 1.8 Namenode (Hadoop 1-ali) alicloud (CentOS 7.3) 120.26.173.104 hadoop version 2.8.5 Eclipse installation Enterprise version needs to be installed. For network reasons, offline installation package is recommended https://www.e ...

Posted by Duodecillion on Sun, 28 Jun 2020 22:17:50 -0700

Hbase client programming (Eclipse)

Hadoop stepping on the pit (4) Hbase client programming (Eclipse) Environmental Science For the installation and configuration of Hbase and the configuration of Eclipse, please refer to the previous two articles The version of hbase used in this series is 1.4.13 The selected hadoop version of this series is 2.8.5 Please pay attention to the per ...

Posted by Quest on Sun, 28 Jun 2020 21:59:57 -0700

How Dubbo's XML is used and how it integrates with Spring

catalog How Dubbo's XML is used and how it integrates with Spring ServiceClassPostProcessor Implemented BeanDefinitionRegistryPostProcessor class How the bean instance of ServiceClassPostProcessor is injected into the container in advance. The definition of DubboNamespaceHandler, the parsing class ...

Posted by Kower on Sat, 27 Jun 2020 21:27:35 -0700

RocketMQ entry to the ground novice can also understand the principle and practice!

Learning any technology is a two-step process: Setting up the environment helloworld I'm no exception. I'll do it directly. 1, RocketMQ installation 1. Documents Official website http://rocketmq.apache.org GitHub https://github.com/apache/rocketmq 2. Download wget https://mirror.bit.edu.cn/apache/rocketmq/4.7.0/rocketmq-all-4.7.0-bin-rele ...

Posted by muretto on Sat, 27 Jun 2020 20:44:03 -0700

ActiveMQ learning note 5 -- the transmission protocol of ActiveMQ

1. Introduction In the previous receiving ActiveMQ and code cases, you have configured: broker-url: tcp://192.168.106.131:61616 See the default protocol of ActiveMQ for TCP. However, ActiveMQ processing supports TCP thank you. It also supports client broker communication protocols: TCP, NIO, UDP, ...

Posted by bigger on Sat, 27 Jun 2020 02:27:07 -0700

Detailed explanation of watermark in flink EventTime

window operation on data In the window operation of flow data, when event time passes the window time, it will close the window. Then in the actual production environment, due to various reasons such as the network, late data may appear, resulting in data disorder. As shown in the figure below, the ...

Posted by plex303 on Thu, 25 Jun 2020 22:46:08 -0700