web.xml文件配置
创建好一个SpringMVC项目后，需要在需要在WB-INF文件夹下配置web.xml文件
<? 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" > <display-name> SpringMVCdemo </display-name> <welcome-file-list> <welcome-file> index.jsp </welcome-file> </welcome-file-list> <!--加载springMVC的配置文件--> <context-param> <param-name> contextConfigLocation </param-name> <param-value> classpath*:springMVC.xml </param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <servlet> <servlet-name> dispatcher </servlet-name> <!--中央核心控制器--> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup> 1 </load-on-startup> </servlet> <servlet-mapping> <servlet-name> dispatcher </servlet-name> <!--请求--> <url-pattern> *.do </url-pattern> </servlet-mapping> <!--过滤器，编码格式--> <filter> <filter-name> characterEncodingFilter </filter-name> <filter-class> org.springframework.web.filter.CharacterEncodingFilter </filter-class> <init-param> <param-name> encoding </param-name> <param-value> UTF-8 </param-value> </init-param> </filter> <filter-mapping> <filter-name> characterEncodingFilter </filter-name> <url-pattern> /* </url-pattern> </filter-mapping> </web-app>springMVC.xml文件配置
在src文件夹下创建springMVC.xml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:aop = "http://www.springframework.org/schema/aop" xmlns:context = "http://www.springframework.org/schema/context" xmlns:tx = "http://www.springframework.org/schema/tx" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.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" > <!--自动扫描上下文包--> <context:component-scan base-package = "cn.zhc.*" ></context:component-scan> <!--自动开启MVC模式注解--> <mvc:annotation-driven></mvc:annotation-driven> <!--将请求映射到标注@RequestMapping注解的控制器和处理方法上--> <mvc:default-servlet-handler></mvc:default-servlet-handler> <!--视图解析器--> <bean id = "internalResourceViewResolver" class = "org.springframework.web.servlet.view.InternalResourceViewResolver" > <!--前缀后缀--> <property name = "prefix" value = "/" ></property> <property name = "suffix" value = ".jsp" ></property> </bean> </beans>第一个SpringMVC实例
index.jsp
<%@ page contentType = "text/html;charset=UTF-8" language = "java" %> <html> <head> <title> $Title$ </title> </head> <body> 哈哈哈哈哈 </body> </html>测试类：
package cn . zhc . test ; import org . springframework . stereotype . Controller ; import org . springframework . web . bind . annotation . RequestMapping ; @Controller public class Test { @RequestMapping ( "/hello.do" ) public String hello (){ System . out . println ( "hhhhhhhhhhhh" ); return "index" ; } }在项目运行后，在前端页面路径后输入/hello.do，控制台会输出hhhhhhhhhhhh
参数传递
view到controller 四种方式
@RequestMapping ( "/hello.do" ) public String hello ( String name ){ //路径后加?name= 不加会传null System . out . println ( name ); return "index" ; } //Controller方法方法中参数前加@RequestParam进行直接入参 @RequestMapping ( "/hello.do" ) public String hello ( @RequestParam String name ){ //不传参会请求错误400 System . out . println ( name ); return "index" ; } @RequestMapping ( "/hello.do" ) public String hello ( @RequestParam ( value = "name" , required = false ) String name ){ //required是否需要传参 System . out . println ( name ); return "index" ; } @RequestMapping ( value = "/hello.do" , method = RequestMethod . GET , params = "name" ) public String hello ( String name ){ //不传参会请求错误400 System . out . println ( name ); return "index" ; }controller到view 三种方式
@RequestMapping ( "/hello.do" ) public ModelAndView hello (){ ModelAndView mv = new ModelAndView (); mv . addObject ( "name" , "zhu" ); //添加模型数据 mv . setViewName ( "index" ); //设置视图名称 return mv ; } @RequestMapping ( "/hello.do" ) public String hello ( Model model ){ model . addAttribute ( "name" , "huai" ); model . addAttribute ( "chang" ); //在model中若不指定key，则使用默认对象的类型作为key return "index" ; } @RequestMapping ( "/hello.do" ) public String hello ( Map < String , Object > map ){ map . put ( "name" , "lisa" ); return "index" ; }总结
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原文链接：https://blog.csdn.net/qq_43928469/article/details/115048026
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