Spring MVC 学习

lpe234

发布于 2020-07-27 17:30:31

4440

发布于 2020-07-27 17:30:31

使用IDEA创建Maven项目，毕竟Maven管理包还是很方便的...

# 大体结构如下
├── pom.xml
├── src
│   └── main
│       ├── resources
│       └── webapp
│           ├── WEB-INF
│           │   └── web.xml
│           └── index.jsp

创建完毕之后，修改 web.xml 文件.

<!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 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_3_1.xsd"
      version="3.1">
    <display-name>Archetype Created Web Application</display-name>

    <!--configure the setting of springmvc DispatcherServlet and configure the mapping-->
    <servlet>
        <servlet-name>mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

默认情况下，会去查找 "servlet-name"-servlet.xml (spring-servlet.xml) 文件

<?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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

    <!-- scan the package and the sub package, 扫描package下面所有含注解的类 -->
    <context:component-scan base-package="cn.lpe234.sdemo"/>

    <!-- don't handle the static resource, 访问静态资源 -->
    <mvc:default-servlet-handler />

    <!-- if you use annotation you must configure following setting -->
    <mvc:annotation-driven />

    <!-- configure the InternalResourceViewResolver, 配置视图解析 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          id="internalResourceViewResolver">
        <!-- 前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

在 WEB-INF 下面创建 jsp/hello.jsp 文件夹及文件。

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

<h2>${msg}</h2>

</body>
</html>

在 src/main 下面创建 java/cn/lpe234/sdemo/controller 文件夹，并创建文件 HelloController.java

package cn.lpe234.sdemo.controller;

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

/**
 * Created by lpe234 on 2017/3/1.
 */


@Controller
public class HelloController {

    @RequestMapping(name = "/hello", method = RequestMethod.GET)
    public String hello(ModelMap model) {
        model.addAttribute("msg", "Hello Spring MVC");

        // System.out.println(model.get("msg"));

        return "hello";
    }

}

至此，spring mvc 结构基本完成

├── pom.xml
├── src
│   └── main
│       ├── java
│       │   └── cn
│       │       └── lpe234
│       │           └── sdemo
│       │               └── controller
│       │                   └── HelloController.java
│       ├── resources
│       └── webapp
│           ├── WEB-INF
│           │   ├── jsp
│           │   │   └── hello.jsp
│           │   ├── mvc-servlet.xml
│           │   └── web.xml
│           └── index.jsp

maven pom 依赖

<!--1)spring核心依赖-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<!--spring ioc依赖 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<!--spring 扩展依赖 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<!--2)spring dao层依赖-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<!--3)spring web相关依赖 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>

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