使用servlet注解开发时，配置了注解不生效的问题解决

编写一个servlet类

@WebServlet(urlPatterns = "/hello2") public class Hello2Servlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { PrintWriter writer = resp.getWriter(); writer.println("hello2"); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } } 

但是在部署程序之后访问之，并没有任何效果，依然是404状态

查看web.xml

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0" metadata-complete="true"> </web-app> 

发现metadata-complete="true"，将其修改为metadata-complete="false"，重新部署程序
访问成功！

本文地址：https://blog.csdn.net/qq754772661/article/details/107875018