SpringMVC —— 入门代码编写

最新推荐文章于 2022-08-02 10:04:59 发布

Feyounger

最新推荐文章于 2022-08-02 10:04:59 发布

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本文链接：https://blog.youkuaiyun.com/qq_44706044/article/details/104177438

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执行流程
1.DispatcherServlet表示前置控制器，是整个SpringMVC的控制中心。用户发出请求，DispatcherServlet接收请求并拦截请求。
2.HandlerMapping为处理器映射。DispatcherServlet调用HandlerMapping,HandlerMapping根据请求url查找Handler
3.HandlerExecution表示具体的Handler,其主要作用是根据url查找控制器，如上url被查找控制器为：input-product
4.HandlerExecution将解析后的信息传递给DispatcherServlet,如解析控制器映射等
5.HandlerAdapter表示处理器适配器，其按照特定的规则去执行Handler
6.Handler让具体的Controller执行
7.Controller将具体的执行信息返回给HandlerAdapter,如ModelAndView
8.HandlerAdapter将视图逻辑名或模型传递给DispatcherServlet
9.DispatcherServlet调用视图解析器(ViewResolver)来解析HandlerAdapter传递的逻辑视图名
10.视图解析器将解析的逻辑视图名传给DispatcherServlet
11.DispatcherServlet根据视图解析器解析的视图结果，调用具体的视图
12.最终视图呈现给用户。

<%--
  Created by IntelliJ IDEA.
  User: LFY
  Date: 2020/2/4
  Time: 15:55
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>👅🐕🕸</title>
</head>
<body>
    <h3>入门程序</h3>
    <a href="hello">入门程序</a>
</body>
</html>

package com.fy.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloController {
    @RequestMapping(path = "/hello")
    public String sayHello(){
        System.out.println("Hello Spring-mvc");
        return "success";
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util.xsd">

    <context:component-scan base-package="com"/>
    <mvc:annotation-driven/>

    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--开启SpringMVC注解的支持-->
    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

<%--
  Created by IntelliJ IDEA.
  User: LFY
  Date: 2020/2/4
  Time: 20:42
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>👅🐕🕸</title>
</head>
<body>
    <h3>入门成功</h3>
</body>
</html>

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:application.xml</param-value>
    </init-param>
    <!--启动服务器就可创建-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>