一、web.xml
-
配置tomcat启动时加载DispatcherServlet
-
配置spring配置文件的路径和名称
<web-app version="4.0"
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">
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 修改配置文件路径和名称 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 自启动，tomcat启动时加载，否则第一次访问时加载 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<display-name>Archetype Created Web Application</display-name>
</web-app>
二、springmvc.xml
-
配置自动扫描注解
-
配置自动加载mvc注解
-
配置解决中文乱码问题
<?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:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.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">
<!-- 扫描注解 -->
<context:component-scan base-package="top.woldcn"></context:component-scan>
<!-- 加载mvc注解 -->
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<!-- 解决Controller返回中文乱码问题 -->
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
</beans>
三、DemoController.java
-
@Controller：配置该类为controller
-
@GetMapping("/test")：配置url映射
-
@ResponseBody：配置方法返回值为返回给前端
-
@Autowired：配置自动装载的service
package top.woldcn.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import top.woldcn.service.DemoService;
@Controller
public class DemoController {
@Autowired
private DemoService demoService;
@GetMapping("/test")
@ResponseBody
public String demo() {
return demoService.demo();
}
}
四、DemoService.java
-
@Service：配置该类为service
package top.woldcn.service;
import org.springframework.stereotype.Service;
@Service
public class DemoService {
public String demo(){
return "this is a test测试";
}
}