<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

@AutoConfiguration
@ConditionalOnClass({RedisOperations.class})
// 將spring.redis開頭的配置和redis進行綁定
@EnableConfigurationProperties({RedisProperties.class})
// 引入了兩個redis連接客戶端，Lettuce（啟動器默認使用）和Jedis的連接配置類
@Import({LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class})
public class RedisAutoConfiguration {
    public RedisAutoConfiguration() {
    }
	// 注入redisTemplate類，認定key-value都是Object類型
    @Bean
    @ConditionalOnMissingBean(
        name = {"redisTemplate"}
    )
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
	// 注入StringRedisTemplate類，認定key-value都是String類型
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        return new StringRedisTemplate(redisConnectionFactory);
    }
}

<dependency>
	<groupId>redis.clients</groupId>
	<artifactId>jedis</artifactId>
</dependency>

package com.decade.interceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class RedisInterceptor implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 獲取請求路徑，把它當(dāng)作key，每請求一次，這個key對應(yīng)的value就自增1
        final String requestURI = request.getRequestURI();
        stringRedisTemplate.opsForValue().increment(requestURI);
        return true;
    }
}

package com.decade.config;
import com.decade.interceptor.LoginInterceptor;
import com.decade.interceptor.RedisInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class MyConfig implements WebMvcConfigurer {
	/**
     * filter和interceptor的功能類似，這兩者的區(qū)別在哪？
     * filter：它是servlet定義的原生組件，脫離了spring也可以使用
     * interceptor：它是spring定義的接口，可以使用spring的自動裝配等功能
     */
    @Autowired
    private RedisInterceptor redisInterceptor;
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // addPathPatterns：設(shè)置要攔截的請求，如果是/**，那么會攔截包括靜態(tài)資源在內(nèi)的所有請求
        // excludePathPatterns：設(shè)置不被攔截的請求，這里我們放行登錄頁請求和靜態(tài)資源
        registry.addInterceptor(new LoginInterceptor())
            .addPathPatterns("/**")
            .excludePathPatterns("/", "/login", "/css/**", "/images/**", "/js/**", "/fonts/**");
        // 這里不能使用new來實例化，因為RedisInterceptor中使用了@Autowired注解，自己new的對象沒被spring管理，所以它不會自動進行依賴注入，所以這里應(yīng)該從容器中拿
        registry.addInterceptor(redisInterceptor)
            .addPathPatterns("/**")
            .excludePathPatterns("/", "/login", "/css/**", "/images/**", "/js/**", "/fonts/**");
    }

package com.decade.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import javax.servlet.http.HttpSession;
@Controller
@Slf4j
public class IndexController {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    /**
     * 去main頁面
     * @return 跳轉(zhuǎn)主頁面
     */
    @GetMapping("/main.html")
    public String mainPage(HttpSession session,Model model){
        final ValueOperations opsForValue = stringRedisTemplate.opsForValue();
        final Object visitTimes = opsForValue.get("/main.html");
        log.info("訪問首頁次數(shù)為:{}", visitTimes);
        return "main";
    }
}