SpringMVC-01

我就是我 2023-07-04 11:20 1阅读 0赞

这个是回顾servlet的基础上，注意web.xml里面的配置文件，  
pom.xml支持文件

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.xiao</groupId>
        <artifactId>springMVC</artifactId>
        <packaging>pom</packaging>
        <version>1.0-SNAPSHOT</version>
        <modules>
            <module>springmvc-01-servlet</module>
        </modules>
    
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.2</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
        </dependencies>
    
    </project>

web.xml配置文件

<?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">
    
    
        <servlet>
            <servlet-name>hello</servlet-name>
            <servlet-class>com.xiao.servlet.HelloServlet</servlet-class>
        </servlet>
    
        <servlet-mapping>
            <servlet-name>hello</servlet-name>
            <url-pattern>/hello</url-pattern>
        </servlet-mapping>
    
    
        
            
        
    
    </web-app>

servlet

package com.xiao.servlet;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    /**
     * @outhor liu
     * @dare 2020/2/8 14:08
     */
    public class HelloServlet extends HttpServlet {
        
    
    
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        
            //1、获取前端参数
            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");
            }
    
            //2、调用业务层
            //3、视图转发或者重定向
            req.getRequestDispatcher("/WEB-INF/jsp/test.jsp").forward(req,resp);
    
        }
    
        @Override
        protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        
            doGet(req,resp);
        }
    }

jsp

<%--
      Created by IntelliJ IDEA.
      User: xiao
      Date: 2020/2/8
      Time: 14:15
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    ${
        msg}
    </body>
    </html>

form表单

<%--
      Created by IntelliJ IDEA.
      User: xiao
      Date: 2020/2/8
      Time: 14:20
      To change this template use File | Settings | File Templates.
    --%>
    <%@ 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="method">
        <input  type="submit">
    </form>
    
    </body>
    </html>