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Reprinted in ( https://zhiku8.com/springboot-jasypt.html) We are clear text in the yml or properties configuration files of the spring boot project, so the security is relatively low. We all know that the configuration file contains some database connection user name and password, some third-party key and other information. So let's be careful. ...

Share a recent problem encountered throughout Flyway and some solutions.If you don't know Flyway yet, I suggest you take a look at this article first Use Flyway in Spring Boot to manage database versions Problem Description The version information used for the project described in the problem appears as follows: Spring Boot: 2.1.3 Flyway:5.2.4 ...

What is a database connection pool? When the system uses JDBC technology to access the database, it will create a connection object, and the creation process of the object is very resource consuming, and the time to create the object is also very long. Assuming that the system has 10000 accesses a day, then 10000 connection objects will be crea ...

The nature of data reading and writing No matter which ORM framework, the essence of data reading and writing is to encapsulate JDBC. Its main purpose is to simplify the development process of JDBC, so that developers pay more attention to business. The following is the core process of JDBC: Register JDBC driver (Class.forName("XXX") ...

brief introduction I believe that if you have configured too many data sources or are about to configure too many data sources, you will find the following solutions on the Internet: 1. Use AOP slice to switch dynamic data source 2. Use basePackages of MapperScan to configure different mapper directories and template s 3. Database agent middle ...

[TOC] Quote The first two sections describe the Mybatis environment setup and the lifecycle of its components.These are our essential skills to get started with Mybatis.With the padding from the first two articles, we're going to dig into Mybatis today and fill the hole we buried before. XML Configuration Label overview <?xml version="1.0" ...

1. Jar package for spring framework, jar package for mybatis, jar package for spring MVC, integration jar package, database connection pool package 2. The tool I use is IDEA jar package required for integration: Write profile db.properties jdbc.driver=com.mysql.cj.jdbc.Driver //Remember to add cj jdbc.url=jdbc ...

In the data source of spark, only Append, Overwrite, ErrorIfExists, Ignore are supported. But almost all of our online businesses need the upsert function, that is, the existing data must not be overwritten. In mysql, we use: ON DUPLICATE KEY UPDATE. Is there such an implementation? Official: sorry, no, dounine: I have it. You can ...

Introduction When it comes to the word "persistence", people who operate databases every day are certainly familiar with it. In persistence, the two giants that have caught the attention of developers are Hibernate and MyBatis, and many developers often compare them.Google is a comparison of the two. Hibernate and MyBatis, like java ...

What is Druid? Druid is the best database connection pool in the Java language. Druid can provide powerful monitoring and extension functions. Project configuration 1. Add dependency <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <vers ...