MVC框架实现servlet的相关步骤

    
        junit
        junit
        4.12
    
    
        org.springframework
        spring-webmvc
        5.1.9.RELEASE
    
    
        javax.servlet
        servlet-api
        2.5
    
    
        javax.servlet.jsp
        jsp-api
        2.2
    
    
        javax.servlet
        jstl
        1.2
    

这是添加 web app

这是在子工程中添加的依赖

    
        
            javax.servlet
            servlet-api
            2.5
        

        
            javax.servlet.jsp
            jsp-api
            2.2
        
    

public class HelloServlet extends HttpServlet {
    public HelloServlet() {
    }

    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String method = req.getParameter("method");
        if (method.equals("add")) {
            req.getSession().setAttribute("msg", "执行了add方法");
        }

        if (method.equals("delete")) {
            req.getSession().setAttribute("msg", "执行了delete方法");
        }

        req.getRequestDispatcher("/WEB-INF/jsp/text.jsp").forward(req, resp);
    }

    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doGet(req, resp);
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


${msg}

    
        hello
        com.yy.servlet.HelloServlet
    
    
        hello
        /hello
    

直接蹦出来