Spring+SpringMVC 分开配置

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_3_1.xsd"
         version="3.1">
    
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <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>

HelloService.java

package org.javaboy.springmvc01.service;

import org.springframework.stereotype.Service;

/**
 * @author 邓雪松 (づ￣ 3￣)づ)
 * @create 2021-10-30-18-56
 */
@Service
public class HelloService {
    public String hello(String name){
        return "hello "+name;
    }
}

applicationContext.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">
    <!--除了Controller别的都扫-->
    <context:component-scan base-package="org.javaboy.springmvc01" use-default-filters="true">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

MyController.java

package org.javaboy.springmvc01.controller;

import org.javaboy.springmvc01.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author 邓雪松 (づ￣ 3￣)づ)
 * @create 2021-10-29-22-17
 */
@org.springframework.stereotype.Controller("/hello")
public class MyController implements Controller {
    //将helloService注入到MyController
    @Autowired
    HelloService helloService;
    /**
     * 这个方法用来处理请求
     * @param request 这个就是前端发送过来得请求
     * @param response 这个就是服务端给前端得响应
     * @return 返回 ModelAndView,Model 就相当于我们的 数据模型,View 则是视图
     * @throws Exception
     */
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        ModelAndView mv = new ModelAndView("hello");//配置的试图名字就叫hello
        mv.addObject("name","javaboy");//key:name value:javaboy
        //打个HelloService的日志
        System.out.println("helloService.hello(\"javaboy\")="+helloService.hello("javaboy"));
        return mv;
    }
}

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="org.javaboy.springmvc01.controller.MyController" name="/hello"/>-->
    <!--下边是只扫controller,别的都不扫-->
    <context:component-scan base-package="org.javaboy.springmvc01" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!--配置处理器映射器,将前端请求的接口关联起来-->
    <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>

浏览器访问:http://localhost:8081/hello
显示:hello javaboy!

结束