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