In depth analysis of common dependency modules of spring boot starter
Two advantages of spring boot:
1. The concept of "convention over configuration (COC)" based on spring framework and the road of best practice.
2. Develop spring boot starter automatic configuration dependency modules for various scenarios for daily enterprise applications, and "use them out of the box" (spring boot starter - is agreed as the naming prefix, which is located under the org.springframework.boot package or namespace).
Application logging and spring boot starter logging
The common log systems are: Java Util provides log support by default, including log4j, log4j2 and Commons logging. The following spring boot starter logging is also one of them.
Maven dependency:
Springboot will use logback as the framework for application logging. When the program starts, it will be started by org. Com springframework. boot. Logging logging application lisetener is initialized and used as appropriate.
If you want to change the application log settings provided by springboot, you can use the following principles:
Follow the logback Convention and use your own customized logback in the classpath XML configuration file.
Provide your own logback at any location in the file system XML configuration file, and then through logging The config configuration item points to the configuration file and then references it, for example, in application Specify the following configuration in properties:
Rapid web application development and spring boot starter Web
Maven dependency:
In the current project, running MVN spring boot: run can directly enable a web application nested with Tomcat.
If there is no cotreller providing any service, accessing any path will return a springboot default error page (whitelabel error page).
Embedded web container level conventions and customization
Spring boot starter Web uses nested Tomcat as the web container to provide HTTP services externally by default, and port 8080 listens and provides services externally by default.
We can also use spring boot starter jetty or spring boot starter underow as web containers.
If you want to change the default configuration port, you can change it in application Specify in properties:
Similar configurations include:
If the appeal still fails to meet the requirements, springboot supports customization of embedded web container instances. You can customize the embedded web container by registering a component of type embeddedservletcontainercustomizer in the IOC container
Data access and spring boot starter JDBC
Maven dependency:
By default, when we do not configure any datasource, springboot will automatically configure a datasource for us. This automatic configuration method is generally applicable to testing. It is better to configure an instance of datasource for development.
If our project only depends on one database, it is most convenient to use the parameters provided by the datasource automatic configuration module:
There will also be automatic configuration: jdbctemplate, datesourcetransactionmanager, etc. we just need to inject (@ Autowired) when using
In addition, springboot also supports spring boot data JPA and spring boot data mongodb
Spring boot starter AOP application and its usage scenario
AOP: Aspect Oriented Programming
Maven dependency:
Spring boot starter AOP is mainly composed of two parts:
1. It is located at org. Of spring boot autoconfigure sringframework. boot. autoconfigure. aop. The @ configuration configuration configuration class and corresponding configuration items provided by aopaoutoconfiguration are the following two configuration items:
2. The spring boot starter AOP module provides dependencies on spring AOP aspectjrt and aspectjweaver
Application security and spring boot starter security / / todo
summary
The above is the commonly used dependency modules of spring boot starter introduced by Xiaobian. I hope it will be helpful to you. If you have any questions, please leave me a message and Xiaobian will reply to you in time. Thank you very much for your support for the programming tips website!