输入servlet地址，404NOT FOUND

WelcomeServlet.java代码

package servlets;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;//http://localhost:8080/test/servlets/WelcomeServletpublic class WelcomeServlet extends HttpServlet{ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,IOException { response.setContentType("text/html;charset=gb2312"); PrintWriter out=response.getWriter(); out.println("欢迎来到本系统！"); System.out.print(request.getRequestURL()); }}

web.xml代码

    
        WelcomeServlet
        servlets.WelcomeServlet
    
    
        WelcomeServlet
        /servlets/WelcomeServlet
    

原因：访问地址输入错误，不需要项目名test...虽然不知道为什么，但这样做就对了。