SpringMVC
ssm：Mybatis+Spring+SpringMVC MVC三层架构
JavaSE：认真学习，老师带，入门快
JavaWeb：认真学习，老师带，入门快
SSM框架：研究官方文档，锻炼自学能力，笔记能力，项目能力
SpringMVC+Vue+SpringBoot+SpringCloud+Linux
SSM = JavaWeb做项目；
Spring：IOC和AOP
SpringMVC:SpringMVC的执行流程！【重点】
SpringMVC：SSM框架整合！
1. 回顾MVC
什么是MVC？
新建一个Maven工程当作父工程！pom依赖！
<!--依赖-->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
建立一个Moudle：springmvc-01-servlet，添加web app的支持。
导入servlet和jsp依赖：已经包含在父依赖
编写一个Servlet类，用来处理用户的请求
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.页面跳转
req.getRequestDispatcher("/WEB-INF/jsp/test.jsp").forward(req,resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req,resp);
}
}
编写Hello.jsp，在WEB-INF目录下新建一个jsp的文件夹，新建hello.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
#{msg}
</body>
</html>
在web.xml中注册servlet
<servlet> <servlet-name>hello</servlet-name> <servlet-class>com.kuang.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>hello</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping>
配置Tomcat，并启动测试！localhost:8080?hello/method=addlocalhost:8080?hello/method=delete
注意点：
每个模块需要配置到tomcat-deployment，必须部署到服务器上！！！
MVC框架要做哪些事情？
