我有以下的servlet:
public class MyServlet extends HttpServlet {
private static final long serialVersionUID = 16252534;
private static int ping = 3000;
private Thread t;
private static boolean shouldStop = false;
@Override
public void init() throws ServletException {
super.init();
t = new Thread(new Runnable() {
@Override
public void run() {
while(!shouldStop) {
System.out.println("Now:" + System.currentTimeMillis());
try {
Thread.sleep(ping);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
t.start();
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
super.doGet(req, resp);
System.out.println("doGet");
PrintWriter out = resp.getWriter();
out.println("<html><h1>It works!!</h1></html>");
}
@Override
public void service(ServletRequest req, ServletResponse resp) throws ServletException, IOException {
super.service(req, resp);
System.out.println("service");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doPost(req, resp);
System.out.println("doPost");
}
@Override
public void destroy() {
super.destroy();
System.out.println("Destroy servlet");
shouldStop = true;
}
}
以下是我在web.xml
中的映射:
<display-name>MyServer</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>MyServlet</servlet-name>
<servlet-class>com.myserver.MyServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/MyServlet</url-pattern>
</servlet-mapping>
当我在Chrome浏览器中打开
http://localhost:8080/MyServer/MyServlet
时,控制台会记录从doService()
中输出的“service”,并且我的线程可以正常工作,但是我没有看到从doGet()
中输出的“It Works”的记录,浏览器中出现以下错误信息:这是由什么引起的?我该如何解决?HTTP方法GET不受此URL支持
ServletContextListener
则是在Web应用程序启动和关闭期间进行全局初始化和清理的正确位置。 - BalusC