Spring MVC基础（一）：HelloWorld案例

构建1个maven项目
pom.xml

     <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.3</version>
        </dependency>
    </dependencies>

新建webapp目录
新建web.xml

 <?xml version="1.0" encoding="UTF-8"?>
<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_4_0.xsd"
         version="4.0">
 
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
  
</web-app>

webapp目录下新建jsp目录，新建hello.jsp

 <%--
  Created by IntelliJ IDEA.
  User: sang
  Date: 2021/2/5
  Time: 21:23
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
hello ${name}!
</body>
</html>

spring-servlet.xml

 <?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
    <!--首先配置一个 MyController 的实例-->
    <bean class="com.ychen.mvc.controller.MyController" name="/hello"/>
 
    <!--配置处理器映射器，将前端请求和后段的接口关联起来-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
        <property name="beanName" value="/hello"/>
    </bean>
    <!--处理器适配器-->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" id="handlerAdapter"/>
    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
        <property name="prefix" value="/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

MyController

 public class MyController implements Controller {
 
    /**
     * 这个方法用来处理请求
     * @param request 这个就是前端发送来的请求
     * @param response 这个就是服务端给前端的响应
     * @return 返回 ModelAndView，Model 就相当于我们的 数据模型，View 则是视图
     * @throws Exception
     */
    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        // 创建1个视图hello，并添加数据，最后返回
        ModelAndView mv = new ModelAndView("hello");
        mv.addObject("name", "javaboy");
        return mv;
    }
 
}

配置tomcat
启动测试
工作流程如下

 # 前端访问url，去找对应的bean
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
        <property name="beanName" value="/hello"/>
    </bean>
# 找到对应的bean
<bean class="org.javaboy.springmvc01.controller.MyController" name="/hello"/>
# 在对应的bean中创建视图模式
    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        // 创建1个视图hello，并添加数据，最后返回
        ModelAndView mv = new ModelAndView("hello");
        mv.addObject("name", "javaboy");
        return mv;
    }
# 解析前后缀
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
        <property name="prefix" value="/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
# 找到对应的jsp页面

posted @ 2022-04-21 13:51 DogLeftover 阅读(31) 评论(0) 编辑收藏举报

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Spring MVC基础（一）：HelloWorld案例

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	<packaging>war</packaging>
	<dependencies>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-webmvc</artifactId>
	<version>RELEASE</version>
	</dependency>
	<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
	<version>4.0.1</version>
	</dependency>
	<dependency>
	<groupId>javax.servlet.jsp</groupId>
	<artifactId>javax.servlet.jsp-api</artifactId>
	<version>2.3.3</version>
	</dependency>
	</dependencies>

	<?xml version="1.0" encoding="UTF-8"?>
	<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_4_0.xsd"
	version="4.0">

	<servlet>
	<servlet-name>springmvc</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<init-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:spring-servlet.xml</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
	<servlet-name>springmvc</servlet-name>
	<url-pattern>/</url-pattern>
	</servlet-mapping>

	</web-app>

	<%--
	Created by IntelliJ IDEA.
	User: sang
	Date: 2021/2/5
	Time: 21:23
	To change this template use File \| Settings \| File Templates.
	--%>
	<%@ page contentType="text/html;charset=UTF-8" language="java" %>
	<html>
	<head>
	<title>Title</title>
	</head>
	<body>
	hello ${name}!
	</body>
	</html>

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

	<!--首先配置一个 MyController 的实例-->
	<bean class="com.ychen.mvc.controller.MyController" name="/hello"/>

	<!--配置处理器映射器，将前端请求和后段的接口关联起来-->
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
	<property name="beanName" value="/hello"/>
	</bean>
	<!--处理器适配器-->
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" id="handlerAdapter"/>
	<!--视图解析器-->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
	<property name="prefix" value="/jsp/"/>
	<property name="suffix" value=".jsp"/>
	</bean>
	</beans>

	public class MyController implements Controller {

	/**
	* 这个方法用来处理请求
	* @param request 这个就是前端发送来的请求
	* @param response 这个就是服务端给前端的响应
	* @return 返回 ModelAndView，Model 就相当于我们的数据模型，View 则是视图
	* @throws Exception
	*/
	@Override
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
	// 创建1个视图hello，并添加数据，最后返回
	ModelAndView mv = new ModelAndView("hello");
	mv.addObject("name", "javaboy");
	return mv;
	}

	}

	# 前端访问url，去找对应的bean
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
	<property name="beanName" value="/hello"/>
	</bean>
	# 找到对应的bean
	<bean class="org.javaboy.springmvc01.controller.MyController" name="/hello"/>
	# 在对应的bean中创建视图模式
	@Override
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
	// 创建1个视图hello，并添加数据，最后返回
	ModelAndView mv = new ModelAndView("hello");
	mv.addObject("name", "javaboy");
	return mv;
	}
	# 解析前后缀
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
	<property name="prefix" value="/jsp/"/>
	<property name="suffix" value=".jsp"/>
	</bean>
	# 找到对应的jsp页面