SpringBoot中引入Redis

1. 引入Redis依赖

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

<!-- 引入redis连接池的依赖 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

2. 添加redis配置

spring:
  redis:
    database: 0
    host: 127.0.0.1
    port: 6379
    timeout: 5000
    lettuce:
      pool:
        max-active: 32
        max-wait: -1
        max-idle: 16
        min-idle: 8

3. 设置redis配置类

import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig {

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        //使用fastjson序列化
        FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean
    @ConditionalOnMissingBean(StringRedisTemplate.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
}

4. 配置工具类，封装常用方法

import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import org.apache.commons.lang3.BooleanUtils;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

@Component
public class RedisUtil {

    @Resource
    private RedisTemplate<String, Object> redisTemplate;

    /**
     * 写入缓存
     */
    public boolean set(final String key, Object value) {
        boolean result = false;
        try {
            ValueOperations<String, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 写入缓存设置时效时间
     */
    public boolean set(final String key, Object value, Long expireTime) {
        boolean result = false;
        try {
            ValueOperations<String, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 更新缓存
     */
    public boolean getAndSet(final String key, String value) {
        boolean result = false;
        try {
            redisTemplate.opsForValue().getAndSet(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 批量删除对应的value
     */
    public void remove(final String... keys) {
        for (String key : keys) {
            remove(key);
        }
    }

    /**
     * 批量删除key
     */
    public void removePattern(final String pattern) {
        Set<String> keys = redisTemplate.keys(pattern);
        if (CollectionUtils.isNotEmpty(keys)) {
            redisTemplate.delete(keys);
        }
    }

    /**
     * 删除对应的value
     */
    public void remove(final String key) {
        if (exists(key)) {
            redisTemplate.delete(key);
        }
    }

    /**
     * 判断缓存中是否有对应的value
     */
    public boolean exists(final String key) {
        Boolean isExists = redisTemplate.hasKey(key);
        return BooleanUtils.isTrue(isExists);
    }

    /**
     * 读取缓存
     */
    public Object get(final String key) {
        ValueOperations<String, Object> operations = redisTemplate.opsForValue();
        return operations.get(key);
    }

    /**
     * 哈希 添加
     */
    public void hmSet(String key, Object hashKey, Object value) {
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        hash.put(key, hashKey, value);
    }

    /**
     * 哈希获取数据
     */
    public Object hmGet(String key, Object hashKey) {
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        return hash.get(key, hashKey);
    }

    /**
     * 列表添加
     */
    public void lPush(String k, Object v) {
        ListOperations<String, Object> list = redisTemplate.opsForList();
        list.rightPush(k, v);
    }

    /**
     * 列表获取
     */
    public List<Object> lRange(String k, long l, long l1) {
        ListOperations<String, Object> list = redisTemplate.opsForList();
        return list.range(k, l, l1);
    }

    /**
     * 集合添加
     */
    public void addSet(String key, Object value) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        set.add(key, value);
    }

    /**
     * 删除集合下的所有值
     */
    public void removeSetAll(String key) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        Set<Object> objectSet = set.members(key);
        if (objectSet != null && !objectSet.isEmpty()) {
            for (Object o : objectSet) {
                set.remove(key, o);
            }
        }
    }

    /**
     * 判断set集合里面是否包含某个元素
     */
    public Boolean isMember(String key, Object member) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        return set.isMember(key, member);
    }

    /**
     * 集合获取
     */
    public Set<Object> setMembers(String key) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        return set.members(key);
    }

    /**
     * 有序集合添加
     */
    public void zAdd(String key, Object value, double source) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        zset.add(key, value, source);
    }

    /**
     * 有序集合获取指定范围的数据
     */
    public Set<Object> rangeByScore(String key, double source, double source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.rangeByScore(key, source, source1);
    }

    /**
     * 有序集合升序获取
     */
    public Set<Object> range(String key, Long source, Long source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.range(key, source, source1);
    }

    /**
     * 有序集合降序获取
     */
    public Set<Object> reverseRange(String key, Long source, Long source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.reverseRange(key, source, source1);
    }
}

5. 编写测试类

import com.alibaba.fastjson.JSON;
import com.maple.demo.util.RedisUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

@Slf4j
@RestController
@AllArgsConstructor
@RequestMapping("/example")
@Api(tags = "实例演示-Redis接口文档")
public class TestRedisController {

    private final RedisUtil redisUtil;

    @PutMapping("/insertStr")
    @ApiOperation(value = "插入String类型的数据到redis")
    public void insertStr(String key, String value) {
        redisUtil.set(key, value);
    }

    @PostMapping("/getStr")
    @ApiOperation(value = "根据key获取redis的数据")
    public String getStr(String key) {
        return String.valueOf(redisUtil.get(key));
    }

    @DeleteMapping("/deleteStr")
    @ApiOperation(value = "根据key删除redis的数据")
    public Boolean deleteStr(String key) {
        redisUtil.remove(key);
        return redisUtil.exists(key);
    }

    @PostMapping("/operateMap")
    @ApiOperation(value = "模拟操作Map集合的数据")
    public Object operateMap() {
        redisUtil.hmSet("maple:map", "xiaofeng", "笑小枫");
        return redisUtil.hmGet("maple:map", "xiaofeng");
    }

    @PostMapping("/operateList")
    @ApiOperation(value = "模拟操作List集合的数据")
    public String operateList() {
        String listKey = "maple:list";
        redisUtil.lPush(listKey, "1");
        redisUtil.lPush(listKey, "2");
        redisUtil.lPush(listKey, "3");
        return JSON.toJSONString(redisUtil.lRange(listKey, 0, 2));
    }

    @PostMapping("/operateSet")
    @ApiOperation(value = "模拟操作Set集合的数据")
    public String operateSet() {
        String listKey = "maple:set";
        redisUtil.addSet(listKey, "小枫");
        redisUtil.addSet(listKey, "小明");
        redisUtil.addSet(listKey, "小枫");
        log.info("集合中是否包含小枫" + redisUtil.isMember(listKey, "小枫"));
        log.info("集合中是否包含小红" + redisUtil.isMember(listKey, "小红"));
        return JSON.toJSONString(redisUtil.setMembers(listKey));
    }

    @PostMapping("/operateZSet")
    @ApiOperation(value = "模拟操作ZSet有序集合的数据")
    public String operateZSet() {
        String listKey = "maple:zSet";
        redisUtil.zAdd(listKey, "小枫", 8);
        redisUtil.zAdd(listKey, "小明", 1);
        redisUtil.zAdd(listKey, "小红", 12);
        redisUtil.zAdd(listKey, "大明", 5);
        redisUtil.zAdd(listKey, "唐三", 10);
        redisUtil.zAdd(listKey, "小舞", 9);
        // 降序获取source最高的5条数据
        return JSON.toJSONString(redisUtil.reverseRange(listKey, 0L, 4L));
    }
}

文章来源地址https://uudwc.com/A/rZ2r6