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SpringMVC_入门项目

SpringMVC项目入门
2023-09-11 14:21:36 时间
    本项目是SpringMVC的入门项目，用于演示SpringMVC的项目配置、各层结构，功能较简单

一、Eclipse中创建maven项目

二、pom.xml添加依赖

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<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
</dependency>
 
<!--① 依赖的Spring模块类库 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>3.1.1.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>3.1.1.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>3.2.3.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>3.2.3.RELEASE</version>
</dependency>

三、web.config配置文件

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<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>SpringMVC</display-name>
     
    <!-- Spring应用上下文， 理解层次化的ApplicationContext -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
     
     
    <!-- DispatcherServlet, Spring MVC的核心 -->
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- DispatcherServlet对应的上下文配置， 默认为/WEB-INF/$servlet-name$-servlet.xml -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <!-- mvc-dispatcher拦截所有的请求 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

四、添加applicationContext.xml配置文件 
        文件路径对应web.xml中<context-param><param-value>节点值

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<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-3.1.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
     
    <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->
    <context:component-scan base-package="com.james"/>
</beans>

五、添加mvc-dispatcher-servlet.xml配置文件

        文件路径对应web.xml中<servlet><init-param><param-value>节点值

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<?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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <context:component-scan base-package="com.james">
        <context:include-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
 
    <!-- 扩充了注解驱动，可以将请求参数绑定到控制器参数 -->
    <mvc:annotation-driven />
 
    <!-- 静态资源处理， css， js， imgs -->
    <mvc:resources mapping="/resources/**" location="/resources/" />
 
    <!-- /WEB-INF/views/ 对应jsp文件路径 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

六、添加web、service、dao层及类

        1、HelloController.java  包自定义

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package com.web.controller;
 
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.james.service.HelloService;
 
@Controller
@RequestMapping("/hello")
public class HelloController {
 
    @Autowired
    private HelloService service;
     
    @RequestMapping("/mvc")
    public String helloMvc(HttpSession httpSession) {
 
        System.out.println("进入：HelloController-->helloMvc");
        this.service.helloMvc();
         
        // 视图渲染，/WEB-INF/views/home.jsp
        return "home";
    }
}

        2、HelloService.java

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package com.service;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import com.dao.HelloDao;
 
@Service
public class HelloService {
     
    @Autowired
    private HelloDao dao;
     
    public void helloMvc() {
        System.out.println("进入：HelloService-->helloMvc");
         
        this.dao.helloMvc();
    }
}

        3、HelloDao.java

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package com.dao;
 
import org.springframework.stereotype.Repository;
 
@Repository
public class HelloDao {
    public void helloMvc() {
        System.out.println("进入：HelloDao-->helloMvc");
         
        System.out.println("进入：HelloDao-->helloMvc2");
    }
}


七、利用jetty启动mvc并查看输出







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