springMVC的使用方式
1.通过maven引入相关的jar包依赖
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.6.RELEASE</version> </dependency>
2.在web.xml中配置DispatcherServlet
<servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--配置spring配置文件的路径--> <param-value>classpath:springMVC.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
3.配置spring配置文件
<?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" 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"> <!--开启包扫描--> <context:component-scan base-package="com.yzy"></context:component-scan> <!--配置视图解析器 找到对应的jsp页面--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!--配置前缀匹配符 --> <property name="prefix" value="/"></property> <!--配置后缀匹配符 --> <property name="suffix" value=".jsp"></property> </bean> </beans>
4.根据需求编写对应的handler类
package com.yzy.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import java.util.Map; @Controller("testHandler") public class testHandler { // 通过Model来实现数据封装传输,最后以字符串的形式返回要将数据返回至对应的页面(view) @RequestMapping("/ModelTest") public String ModelTest(Model model){ //此操作相当于在servlet中request.setAttribute("name","model"),下面方法也是如此 model.addAttribute("name","model"); return "index"; } // 通过Map来实现数据封装传输,最后以字符串的形式返回要将数据返回至对应的页面(view) @RequestMapping("/MapTest") public String MapTest(Map<String,String> map){ map.put("name","map"); return "index"; } // 通过ModelAndView来实现数据封装传输,将数据返回至对应的页面(view)同时也封装在此对象中的viewName中 @RequestMapping("/ModelAndViewTest") public ModelAndView ModelAndViewTest(){ ModelAndView modelAndView=new ModelAndView(); modelAndView.addObject("name","modelAndView"); modelAndView.setViewName("index"); return modelAndView; } }
注意:在web.xml中配置DispatcherServlet时,会使css的样式文件也进入到此servlet来,导致无法正常显示样式,应如下在web.xml中添加设置,使css进入默认的servlet
<servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping>
在web.xml中配置DispatcherServlet