Runner使用
如果需要在SpringApplication启动后执行一些逻辑，可以使用ApplicationRunner或CommandLineRunner接口，这两个接口都是只有一个run方法
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| public interface ApplicationRunner {
void run(ApplicationArguments args) throws Exception;
}
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| public interface CommandLineRunner {
void run(String... args) throws Exception;
}
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实现
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| @Component
public class CodeReview implements ApplicationRunner {
@Override
public void run(ApplicationArguments args) throws Exception {
}
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执行位置
该实现类是在SpringApplication.run方法最后进行执行的
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| afterRefresh(context, applicationArguments);
protected void afterRefresh(ConfigurableApplicationContext context,
ApplicationArguments args) {
callRunners(context, args);
}
private void callRunners(ApplicationContext context, ApplicationArguments args) {
List<Object> runners = new ArrayList<Object>();
runners.addAll(context.getBeansOfType(ApplicationRunner.class).values());
runners.addAll(context.getBeansOfType(CommandLineRunner.class).values());
AnnotationAwareOrderComparator.sort(runners);
for (Object runner : new LinkedHashSet<Object>(runners)) {
if (runner instanceof ApplicationRunner) {
callRunner((ApplicationRunner) runner, args);
}
if (runner instanceof CommandLineRunner) {
callRunner((CommandLineRunner) runner, args);
}
}
}
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