1、回顾Servlet开发流程

一、回顾Servlet

 1、创建springmvc项所回顾servlet需要的依赖pom.xml

<dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.6</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

2、创建servlet控制类

public class HelloServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String userName = req.getParameter("userName");
        if("add".equals(userName)){
            req.getSession().setAttribute("msg","执行了add方法");
        }
        if ("delete".equals(userName)) {
            req.getSession().setAttribute("msg","执行了delete方法");
        }
        req.getRequestDispatcher("/WEB-INF/jsp/hello.jsp").forward(req,resp);
    }

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

3、在web.xml上注册Servlet

    <servlet>
        <servlet-name>helloServlet</servlet-name>
        <servlet-class>com.shun.wcs.servlet.HelloServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>helloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>

4、测试发送请求进行测试

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>
  <form action="/hello" method="post">
    <input type="text" name="userName"/>
    <input type="submit"/>
  </form>
  </body>
</html>

 

posted @ 2021-06-15 12:05  shunnWcs  阅读(109)  评论(0)    收藏  举报