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Summary of this section This section mainly realizes the final function of the software and some summary of the project.   About the function of software The function of the software is to pop up a dialog box, tell the user some information about the software, and use the JDialog of swing to comp ...

Preface In today's web development, the authentication of security rights has always played an important role, so Spring has also produced its own security module, but this is a relatively heavy framework, configuration is quite cumbersome. Later, shiro, a lightweight security framework, emerged. The ...

One transaction Core: success or failureAtomicity Both succeed or fail Consistency The data integrity before and after the transaction should be consistent, 1000 Principle: ACID1. Atomicity Either they succeed or they fail; 2. Consistency Data integrity before and after transactions should be consiste ...

Using spring boot + mybatis + RabbitMQ + redis to simulate the second kill function of the mall First, we need to install RabbitMQ. Before installing RabbitMQ, we need to install Erlang, because RabbitMQ is based on Erlang. For specific steps, click the following link: After installation, RabbitMQ i ...

1. Summary of Previous Situation This is a tree traversal implementation. To focus on how queues are implemented, follow these articles:Data structure (3) Handwritten queues2. Basic concepts of trees Chain lists, stacks, and queues are one-to-one linear structures, one-to-many linear structures - trees. ...

Can be manipulated with shell scripts mysqldata base , mysql-e parameter can be used to perform various sql operations (create, delete, add, delete, change, check). usage The sql statement of mysql-hhostname-Pport-uusername-ppassword-e related MySQL allows you to manipulate mysql's methods in a shell without running MySQL at ...

Preface In Web application development, security has always been a very important aspect. In the huge spring ecosystem, the authority verification framework is also very perfect. Among them, spring security is very easy to use. Today, I'd like to record a spring security related problem encountered in development. Problem description When using ...

Made by two couples 1. Basic environment preparation Step 1: download the installation package # wget -P /app/tools/ https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.50/bin/apache-tomcat-8.5.50.tar.gz # wget -P /app/tools/ http://47.111.238.157/jd ...

Chapter 4 MyBatis mapping file 4.1 introduction to mybatis mapping file The real power of MyBatis lies in its mapping statement and its magic. Because of its extraordinary power, the XML file of mapper is relatively simple. If you compare it with JDBC code with the same function, you will immediate ...

MySQL comes with four databases, which are: information_schema performance_schema mysql test This article introduces the performance ﹣ schema library. Sketch Performance schema library is a new storage engine in MySQL 5.5. It is mainly used to collect database server performance parameters, monitor ...