点击Finish会自动生成一个java文件，整理后内容如下：
package servlettest; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/LoginServelt") public class LoginServelt extends HttpServlet { //序列化验证版本一致性 private static final long serialVersionUID = 1L; public LoginServelt() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //主要内容写在这里 } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }servlet-name必须相同（不能与类名相同） servlet-class指向servlet的java文件位置 url-pattern必须以/开头
<servlet> <servlet-name>MyServlet</servlet-name> <servlet-class>servlettest.LoginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>MyServlet</servlet-name> <url-pattern>/LoginServlet</url-pattern> </servlet-mapping>