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SSM framework integration 1. Construction environment 1.1 create data table The MySQL database is used to create a database named ssm and a table named account. CREATE DATABASE ssm; USE ssm; CREATE TABLE account( id INT PRIMARY KEY auto_increment, NAME VARCHAR(20), money DOUBLE ); 1.2 create ...

Introduction to Log Library The most important thing is to distinguish the log system from the log facade. Secondly, the use of log libraries, including configuration and API usage; configuration focuses on the configuration of the log system, API usage focuses on the log facet; Finally, selectio ...

background Log content is complex and diverse, how to collect valuable logs is our focus. The value of logs actually depends on business operations. The value of the same type of logs in different business scenarios will be different. According to the past business practice, combined with some business requirements of the enterprise level, we c ...

Without considering the configuration file first: apiVersion: apps/v1 kind: StatefulSet #####A problem with fixed hostname and stateful service is that if the pod is not in running state, the hostname cannot be resolved, which constitutes a dead cycle. When I sed to replace the hostname, because the pod is not in running state, she can only ...

@[TOC] 1. Environmental preparation 1.1 Download zooKeeper Looking at the documentation for hadoop 2.7.3, we can see that hadoop 2.7.3 was built with zookeeper-3.4.2 when it was highly available, so we followed the instructions of the hadoop website and installed zookeeper-3.4.2. Go to the website to download ZooKeeper 3.4.2Official address: h ...

MapReduce introduction MapReduce is a distributed computing model, which mainly solves the computing problem of massive data. MR consists of two phases: Map and Reduce. Users only need to implement map() and reduce() functions to realize distributed computing. Schematic diagram of MapReduce MR execution process 2.MR schematic diagram      ...

Let's start with the log configuration in the Mybatis configuration file to see how it is implemented <configuration> <settings> <setting name="logImpl" value="NO_LOGGING"/> </settings> </configuration> Start with test code @Test public void shouldReadLogImplFromSettings() throws Exception { ...

Introduction In the previous blog, we introduced sending tomcat exception log mail through log4j, and also mentioned that we would share the same function through python script. The advantage of this way is that we can collect the rest of the log information by modifying the regular expression in the script, and share the impl ...

1, Introduce maven dependency Spring Boot uses LogBack by default, but we don't see the dependent jar package. In fact, the jar package Spring Boot starter logging is a part of Spring Boot starter web or Spring Boot starter dependency. If you want to use Log4j2 here, you need to remove the spring boot starter logging dependency from the spring ...

I need to add the text repeatedly to an existing file in Java. What do I do? #1 building I'll just add a few small details: new FileWriter("outfilename", true) 2. The nd parameter (true) is a parameter called appendable( http://docs.oracle.com/javase/7/docs/api/java/lang/Appendable.html )Function (or interface) of. It is respons ...