处理器映射器与处理器适配器最佳实践(●ˇ∀ˇ●)
作者：互联网
目录结构
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
<groupId>org.javaboy</groupId>
<artifactId>springmvc02</artifactId>
<version>1.0-SNAPSHOT</version>
<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>
</project>
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">
<!--先在Spring中进行包扫描 true扫描所有的但是出去controller-->
<context:component-scan base-package="org.javaboy.springmvc02" use-default-filters="true">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
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"
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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--springmvc上来也是包扫描 false一个也不扫但是又要把controller加进来-->
<context:component-scan base-package="org.javaboy.springmvc02" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--让在MyController中的注解@RequestMapping(/hello)访问到方法hello-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"
id="requestMappingHandlerMapping"/>
<!--找到hello方法后还需要有人执行它-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"
id="requestMappingHandlerAdapter"/>
<!--上面的2句可以用下面这一句代替-->
<!--<mvc:annotation-driven-->
<!--有视图modelandView就要有视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
hello.jsp
<%--
Created by IntelliJ IDEA.
User: 管 理 员
Date: 2021年11月02日 0002
Time: 18:31:07
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>hello</title>
</head>
<body>
<%--${name}就是MyController中配置的javaboy--%>
<h1>hello ${name}</h1>
</body>
</html>
MyController.java
package org.javaboy.springmvc02.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
/**
* @author 邓雪松 (づ￣ 3￣)づ)
* @create 2021-11-02-18-13
* @RequestMapping去标记一个接口,这个接口的访问路径就是/hello,
* 当你访问这个接口的时候就返回hello(return "hello")(ModelAndView视图)
*/
@Controller
public class MyController {
@RequestMapping("/hello")
public ModelAndView hello(){
ModelAndView mv = new ModelAndView("hello");
mv.addObject("name","javaboy");
return mv;
}
}
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">
<!--在web.xml中加载spring和springmvc的配置文件-->
<!--先加载spring的-->
<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>
<!--然后是springmvc的-->
<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>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
运行结果图
结束(●ˇ∀ˇ●)
标签：xml,映射器,适配器,springframework,处理器,ModelAndView,org,servlet,hello 来源： https://www.cnblogs.com/Where-am-i/p/15500490.html