Spring boot boot Load data commandlinerunner

In practice, we will need to load some data or do something like this when the project service is started.
To solve this problem, Spring Boot provides a way for us to implement the interface Commandlinerunner.

It's simple, you just need one class, no other configuration.
To create a class that implements interface Commandlinerunner

 PackageOrg.springboot.sample.runner;ImportOrg.springframework.boot.CommandLineRunner;ImportOrg.springframework.stereotype.Component;/** * Service Start execution * * @author Tan Hongyu (365384722) * @myblog http://blog.csdn.net/catoop/* @create January 9, 2016 * /@Component Public  class MyStartupRunner1 implements Commandlinerunner {    @Override     Public void Run(String ... args)throwsException {System.out.println (The >>>>>>>>>>>>>>> service starts execution, performs loading data, and so on <<<<<<< <<<<<< "); }}

After the Spring boot application starts, it iterates through the instances of the Commandlinerunner interface and runs their run methods. You can also use @order annotations (or implement the Order interface) to specify the order in which all Commandlinerunner instances run.

Below we use @order annotations to define the order of execution.

 PackageOrg.springboot.sample.runner;ImportOrg.springframework.boot.CommandLineRunner;ImportOrg.springframework.core.annotation.Order;ImportOrg.springframework.stereotype.Component;/** * Service Start execution * * @author Tan Hongyu (365384722) * @myblog http://blog.csdn.net/catoop/* @create January 9, 2016 * /@Component@Order(value=2) Public  class MyStartupRunner1 implements Commandlinerunner {    @Override     Public void Run(String ... args)throwsException {System.out.println (The >>>>>>>>>>>>>>> service starts execution, performs loading data, and so on 11111111 <<<<< <<<<<<<< "); }}

 PackageOrg.springboot.sample.runner;ImportOrg.springframework.boot.CommandLineRunner;ImportOrg.springframework.core.annotation.Order;ImportOrg.springframework.stereotype.Component;/** * Service Start execution * * @author Tan Hongyu (365384722) * @myblog http://blog.csdn.net/catoop/* @create January 9, 2016 * /@Component@Order(value=1) Public  class MyStartupRunner2 implements Commandlinerunner {    @Override     Public void Run(String ... args)throwsException {System.out.println (The >>>>>>>>>>>>>>> service starts execution, performs loading data, and so on 22222222 <<<<< <<<<<<<< "); }}

After you start the program, the console outputs the result:

>>>>>>>>>>>>>>>服务启动执行，执行加载数据等操作 22222222 <<<<<<<<<<<<<>>>>>>>>>>>>>>>服务启动执行，执行加载数据等操作 11111111 <<<<<<<<<<<<<

Depending on the console results, the execution priority of @Order annotations is from small to large in order of value values.

Spring boot boot Load data commandlinerunner