SpringBoot集成其他技术-集成Redis

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本文链接： https://blog.csdn.net/Leon_Jinhai_Sun/article/details/102762980

<!-- 配置使用redis启动器 -->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

#Redis
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=abcd

./redis-cli -p 6379 -a abcd

package com.learn;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringbootQuick2Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootQuick2Application.class, args);
    }
}

package com.learn;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.learn.domain.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.ArrayList;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootQuick2Application.class)
public class RedisTest {

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Test
    public void test() throws JsonProcessingException {
        // 1、从redis中获得数据 数据的形式json字符串
        String userListJson = redisTemplate.boundValueOps("user.findAll").get();
        // 2、判断redis中是否存在数据
        if(null==userListJson){
            // 3、不存在数据 从数据库查询
            List<User> all = new ArrayList<User>();
            User user = new User();
            user.setId(1L);
            user.setName("张三");
            user.setPassword("123456");
            user.setUsername("zhangsan");
            all.add(user);
            // 4、将查询出的数据存储到redis缓存中
            // 先将list集合转换成json格式的字符串  使用jackson进行转换
            ObjectMapper objectMapper = new ObjectMapper();
            userListJson = objectMapper.writeValueAsString(all);
            redisTemplate.boundValueOps("user.findAll").set(userListJson);

            System.out.println("=======从数据库中获得user的数据======");

        }else{
            System.out.println("=======从redis缓存中获得user的数据======");
        }


        // 4、将数据在控制台打印
        System.out.println(userListJson);

    }


}

127.0.0.1:6379> get user.findAll
"[{\"id\":1,\"username\":\"zhangsan\",\"password\":\"123456\",\"name\":\"\xe5\xbc\xa0\xe4\xb8\x89\"}]"