java web程序启动自动运行方法（spring）

场景：将web项目部署到tomcat后，启动tomcat后自动运行程序重的某个方法。

环境：spring、springmvc

直接新建一个controller类，让该类实现ApplicationListener<ContextRefreshedEvent>，实现该接口的
public void onApplicationEvent(ContextRefreshedEvent arg0) 方法，在该方法内部编写你要启动后执行的方法。

例如：我写的这个是启动后加载域名到缓存中：

import javax.annotation.Resource;

import org.springframework.context.ApplicationListener;

import org.springframework.context.event.ContextRefreshedEvent;

import org.springframework.stereotype.Controller;

import net.sf.ehcache.Cache;

import net.sf.ehcache.CacheManager;

import net.sf.ehcache.Element;

@Controller

public class DomainCacheController implements ApplicationListener<ContextRefreshedEvent>{

@Override
public void onApplicationEvent(ContextRefreshedEvent arg0) {
// TODO Auto-generated method stub

CacheManager cache = CacheManager.getInstance();

Cache domainCache = cache.getCache("domainCache");

Element element = null;

List<TopLevelDomain> allTop = topService.obtainAllTopLevelDomainByCompanyId(0);
for (TopLevelDomain top : allTop) {
element = new Element(top.getTopUrl(), top.getCompanyId());
domainCache.put(element);
}

List<SecondLevelDomain> allSecond = secondService.obtainAllSecondLevelDomainByCompanyId(0);
for (SecondLevelDomain second : allSecond) {
element = new Element(second.getSecondUrl(), second.getCompanyId());
domainCache.put(element);
}
}

}