java Web项目启动 执行一个方法，执行一个清理工作

我的环境是Spring 环境。

建立一个Servlet 来实现。

web.xml

<servlet>    <display-name>ProjectInitServlet</display-name>    <servlet-name>ProjectInitServlet</servlet-name>    <servlet-class>com.server.utils.ProjectInitServlet</servlet-class>    <load-on-startup>5</load-on-startup>//这里5代表最后加载  </servlet>  <servlet-mapping>    <servlet-name>ProjectInitServlet</servlet-name>    <url-pattern>/ProjectInitServlet</url-pattern>  </servlet-mapping>

ProjectInitServlet.java

public class ProjectInitServlet extends HttpServlet {private static final long serialVersionUID = 1L;  @Overridepublic void init() throws ServletException {System.out.println("+++项目启动初始化操作开始+++++");ApplicationContext appContext = DefaultApplicationContextAware.getContext();WfRuCsaService bean = appContext.getBean(WfRuCsaService.class);List<WorkflowRuCsa> findAll = bean.findAll();System.out.println(findAll.size());System.out.println("+++项目启动初始化操作结束+++++");}}