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1.web.xml配置

<servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext*.xml</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

代码说明：

<load-on-startup>0</load-on-startup>：启动的时候加载配置

1.1中文请求乱码

<!--    2.请求中文乱码-->
    <filter>
        <filter-name>characterFilter</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>characterFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

2.配置applicationContext.xml

resources新增applicationContext.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/task
            http://www.springframework.org/schema/task/spring-task.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            ">
</beans>

2.1开启注解模式

<context:component-scan base-package="com.imooc" />

2.2 新建包 com.imooc.reader

新建包之后，就不报错了

2.3 配置注解模式和静态文件排除

<!--    2.注解模式-->
    <mvc:annotation-driven/>
<!--    3.排除静态文件，提高执行效率-->
    <mvc:default-servlet-handler/>

完整如下：

2.4 响应中文乱码

<mvc:annotation-driven>
<!--        4.响应中文乱码-->
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=utf-8</value>
                        <!--   5.json序列化配置-->
                        <value>application/json;charset=utf-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

2.5配置freemarker模板引擎

新建ftl目录，用来存放模板文件

<!--    5.配置模板引擎-->
    <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <property name="templateLoaderPath" value="/WEB-INF/ftl"/>
        <property name="freemarkerSettings">
            <props>
                <prop key="defaultEncoding">UTF-8</prop>
            </props>
        </property>
    </bean>
    <bean id="ViewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
        <property name="contentType" value="text/html;charset=utf-8"/>
        <property name="suffix" value=".ftl"/>
    </bean>

3.测试

ftl新增test.ftl文件

4.新增控制器

package com.imooc.reader.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import java.util.HashMap;
import java.util.Map;

@Controller
public class TestController {
    @GetMapping("/test/t1")
    public ModelAndView test1(){
        return new ModelAndView("/test");
    }
    @GetMapping("/test/t2")
    @ResponseBody
    public Map test2(){
        Map result = new HashMap();
        result.put("test","测试文本");
        return result;
    }
}

5.重启应用

浏览器访问：http://localhost:8080/test/t2 浏览器访问：http://localhost:8080/test/t1