IDEA maven+spring mvc简单项目

新建一个maven web项目

添加依赖，pom.xml配置文件如下：

<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>4.0.0modelVersion>

  <groupId>com.examplegroupId>
  <artifactId>springmvctestartifactId>
  <version>1.0-SNAPSHOTversion>
  <packaging>warpackaging>

  <name>springmvctest Maven Webappname>
  
  <url>http://www.example.comurl>

  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.7maven.compiler.source>
    <maven.compiler.target>1.7maven.compiler.target>
  properties>

  <dependencies>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-coreartifactId>
      <version>4.3.16.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
      <version>4.3.16.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aopartifactId>
      <version>4.3.16.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-context-supportartifactId>
      <version>4.3.16.RELEASEversion>
    dependency>


    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
      <version>4.3.16.RELEASEversion>
    dependency>

    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>javax.servlet-apiartifactId>
      <version>3.1.0version>
    dependency>

    <dependency>
      <groupId>commons-httpclientgroupId>
      <artifactId>commons-httpclientartifactId>
      <version>3.1version>
    dependency>
  dependencies>

  <build>
    <finalName>springmvctestfinalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-clean-pluginartifactId>
          <version>3.0.0version>
        plugin>
        
        <plugin>
          <artifactId>maven-resources-pluginartifactId>
          <version>3.0.2version>
        plugin>
        <plugin>
          <artifactId>maven-compiler-pluginartifactId>
          <version>3.7.0version>
        plugin>
        <plugin>
          <artifactId>maven-surefire-pluginartifactId>
          <version>2.20.1version>
        plugin>
        <plugin>
          <artifactId>maven-war-pluginartifactId>
          <version>3.2.0version>
        plugin>
        <plugin>
          <artifactId>maven-install-pluginartifactId>
          <version>2.5.2version>
        plugin>
        <plugin>
          <artifactId>maven-deploy-pluginartifactId>
          <version>2.8.2version>
        plugin>
      plugins>
    pluginManagement>
  build>
project>

在根目录下新建一个config目录

在main下新建一个java目录

修改项目结构file->project structure
将java目录设置为sources，点击java->选中sources，可以看到右侧source folders多了一个/src/main/java

将config目录设置为resources，点击config-》选中resources，可以看到右侧resource folders多了一个config目录

点击apply，保存设置

保存后项目目录结构如下所示：

新建一个package com.test.controller 在package下新建HelloController.java

package com.test.controller;

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

@Controller
public class HelloController {


    @RequestMapping("/hello")
    public ModelAndView hello(){
        System.out.println("执行HelloController的hello方法");
        //把数据保存到ModelAndView（相当于保存request域对象）
        ModelAndView mv = new ModelAndView();
        mv.addObject("name", "Spring MVC");

        //返回物理路径
        mv.setViewName("/WEB-INF/jsp/success.jsp");
        return mv;
    }
}

在config目录下添加配置文件spring-mvc.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:contenxt="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    
    <contenxt:component-scan base-package="com.test.controller">contenxt:component-scan>


beans>

修改web.xml文件

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>ch01.spring-mvcdisplay-name>

  
  <servlet>
    <servlet-name>DispatcherServletservlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    
    <init-param>
      <param-name>contextConfigLocationparam-name>
      <param-value>classpath:spring-mvc.xmlparam-value>
    init-param>
  servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServletservlet-name>
    <url-pattern>*.actionurl-pattern>
  servlet-mapping>

  <welcome-file-list>
    <welcome-file>index.htmlwelcome-file>
    <welcome-file>index.htmwelcome-file>
    <welcome-file>index.jspwelcome-file>
    <welcome-file>default.htmlwelcome-file>
    <welcome-file>default.htmwelcome-file>
    <welcome-file>default.jspwelcome-file>
  welcome-file-list>
web-app>

在web-inf下新建一个jsp目录，在jsp目录中新建一个success.jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>


<html>
  <head>
    <title>第一个SpringMVC程序title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    

  head>

  <body>
     第一个SpringMVC程序 
    <hr/>
    ${name}
  body>
html>

部署tomcat server服务
点击edit configuration

tomcat我这里选择的是8.5.31下载地址;https://tomcat.apache.org/download-80.cgi

将springmvctest部署到tomcat容器中，点击Deployment，选择添加springmvctest:var

点击apply保存配置，启动tomcat服务器
访问：http://localhost:8080/hello.action

内部流转：
DispatcherServlet拦截解析请求，发现是.action后缀的，转到HelloController下的hello方法中->hello方法将请求转发到/WEB-INF/jsp/success.jsp界面