這篇文章主要介紹了java 在Jetty9中使用HttpSessionListener和Filter的相關資料,需要的朋友可以參考下
java 在Jetty9中使用HttpSessionListener和Filter
HttpSessionListener
#當Session創建或銷毀的時候被呼叫
範例程式碼:
class MyHttpSessionListener implements HttpSessionListener {
@Override
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
System.out.println("sessionCreated");
}
@Override
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
System.out.println("sessionDestroyed");
}
}註冊方法:
ServletContextHandler.getSessionHandler().addEventListener(new MyHttpSessionListener());
注意: 若整個請求中都沒有用到Session, 則不會產生它, 也不會呼叫Listener
Filter
當客戶端請求資料時被呼叫
範例程式碼:
class MyFilter implements Filter {
public MyFilter() {
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
if (servletRequest instanceof HttpServletRequest) {
HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
System.out.println(httpRequest.getServletPath());
}
filterChain.doFilter(servletRequest, servletResponse);
}
@Override
public void destroy() {
}
}註冊方法:##
ServletContextHandler.addFilter(new FilterHolder(new MyFilter()), "/*", EnumSet.allOf(DispatcherType.class));
注意: 若要求的路徑錯誤, 則不會觸發Filter
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