Hello,SpringMVC程序(注解版)
配置版:https://blog.csdn.net/shuati2000/article/details/121366774
1. 新建一个空的Maven项目
添加Web依赖
2.导包
spring-webmvc,servlet-api,jsp-api,jstl
3.配置在WEB-INF下的web.xml文件
注册DispatcherServlet,关联配置文件,设置启动级别
<?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_4_0.xsd"
version="4.0">
<!--注册DispatcherServlet-->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--关联配置文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-servlet.xml</param-value>
</init-param>
<!--启动级别-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
<!--注意这里的/与/*是有区别的
/ :匹配所有请求(不包括.jsp)
/*:匹配所有请求(包括.jsp)
-->
</servlet-mapping>
</web-app>
4.在resources下编写springmvc-servlet.xml配置文件
开启注解的包扫描,用注解添加处理映射器和处理设配器,添加视图解析器
<?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">
<context:component-scan base-package="com.feng.controller"/>
<!--处理映射器和处理设配器-->
<mvc:default-servlet-handler/>
<mvc:annotation-driven/>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
5.编写Controller
@Controller
public class HelloController {
@RequestMapping("/hello")
public String hello(Model model){
String result = "Hello,SpringMVC";
model.addAttribute("msg",result);
return "hello";
}
}
6.编写需要跳转的页面
根据这个路径进行编写/WEB-INF/jsp/test.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
${msg}
</body>
</html>
7.配置Tomcat启动
Tomcat中项目名为空
结果如下:
注意
若在确保代码没有出现问题的时候,爆404错误
1.可以检查看是否缺少包
2.如果包存在,就在项目中添加lib依赖
3.重启Tomcat