Spring Boot 整合 Redis

官网：https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-redis

集群文档：https://docs.spring.io/spring-data/data-redis/docs/current/reference/html/#cluster

第一步：相关依赖引入

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

第二步：相关配置文件配置（也可以不配置，那么就采取 Spring 默认的配置，包括地址端口号）

#=========redis基础配置=========
spring.redis.database=0
spring.redis.host=127.0.0.1
spring.redis.port=6379
# 连接超时时间 单位 ms（毫秒）
spring.redis.timeout=3000

#=========redis线程池设置=========
# 连接池中的最大空闲连接，默认值也是8。
spring.redis.jedis.pool.max-idle=200

#连接池中的最小空闲连接，默认值也是0。
spring.redis.jedis.pool.min-idle=200

# 如果赋值为-1，则表示不限制；pool已经分配了maxActive个jedis实例，则此时pool的状态为exhausted(耗尽)。
spring.redis.jedis.pool.max-active=2000

# 等待可用连接的最大时间，单位毫秒，默认值为-1，表示永不超时
spring.redis.jedis.pool.max-wait=1000

第三步：封装 Redis 工具类（多数情况都是封装工具类，方便使用）

package com.haitaiinc.clinicpathservice.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;

import java.io.Serializable;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

@Component
public class RedisUtils {

    @Autowired
    private RedisTemplate redisTemplate;

    private static double size = Math.pow(2, 32);

    /**
     * 写入缓存
     *
     * @param key
     * @param offset
     * @return
     */
    public boolean setBit(String key, long offset, boolean isShow) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
            operations.setBit(key, offset, isShow);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 写入缓存
     *
     * @param key
     * @param offset
     * @return
     */
    public boolean getBit(String key, long offset) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
            result = operations.getBit(key, offset);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

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

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

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

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

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

    /**
     * 哈希 添加
     *
     * @param key
     * @param hashKey
     * @param value
     */
    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
     *
     * @param key
     * @param hashKey
     * @return
     */
    public Object hmGet(String key, Object hashKey) {
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        return hash.get(key, hashKey);
    }

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

    /**
     * 列表获取
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public List<Object> lRange(String key, long start, long end) {
        ListOperations<String, Object> list = redisTemplate.opsForList();
        return list.range(key, start, end);
    }

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

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

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

    /**
     * 有序集合获取
     *
     * @param key
     * @param scoure
     * @param scoure1
     * @return
     */
    public Set<Object> rangeByScore(String key, double scoure, double scoure1) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        redisTemplate.opsForValue();
        return zset.rangeByScore(key, scoure, scoure1);
    }

    /**
     * 有序集合获取排名
     *
     * @param key   集合名称
     * @param value 值
     */
    public Long zRank(String key, Object value) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.rank(key, value);
    }

    /**
     * 有序集合获取排名
     *
     * @param key
     */
    public Set<ZSetOperations.TypedTuple<Object>> zRankWithScore(String key, long start, long end) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        Set<ZSetOperations.TypedTuple<Object>> ret = zset.rangeWithScores(key, start, end);
        return ret;
    }

    /**
     * 有序集合添加
     *
     * @param key
     * @param value
     */
    public Double zSetScore(String key, Object value) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.score(key, value);
    }

    /**
     * 有序集合添加分数
     *
     * @param key
     * @param value
     * @param scoure
     */
    public void incrementScore(String key, Object value, double scoure) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        zset.incrementScore(key, value, scoure);
    }

    /**
     * 有序集合获取排名
     *
     * @param key
     */
    public Set<ZSetOperations.TypedTuple<Object>> reverseZRankWithScore(String key, long start, long end) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        Set<ZSetOperations.TypedTuple<Object>> ret = zset.reverseRangeByScoreWithScores(key, start, end);
        return ret;
    }

    /**
     * 有序集合获取排名
     *
     * @param key
     */
    public Set<ZSetOperations.TypedTuple<Object>> reverseZRankWithRank(String key, long start, long end) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        Set<ZSetOperations.TypedTuple<Object>> ret = zset.reverseRangeWithScores(key, start, end);
        return ret;
    }
}

第四步：测试使用

package com.haitaiinc.clinicpathservice.controller;

import com.haitaiinc.clinicpathservice.entity.UserInfo;
import com.haitaiinc.clinicpathservice.utils.JsonUtils;
import com.haitaiinc.clinicpathservice.utils.RedisUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

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

@RestController
public class TestController {
    @Autowired
    RedisUtils redisUtils;

    @RequestMapping("get_redis")
    public String getRedis(String key) {
        String str = (String) redisUtils.get(key);
        return str;
    }

    @RequestMapping("set_redis")
    public String setRedis(String key, String value) {
        boolean bool = redisUtils.set(key, value);
        if(bool){
            return "设置成功";
        }else{
            return "设置失败";
        }
    }

    @RequestMapping("get_user")
    public Object getUser() {
        String str = (String) redisUtils.get("admin");
        UserInfo user = JsonUtils.string2Obj(str,UserInfo.class);
        return user;
    }

    @RequestMapping("set_user")
    public String setUser() {
        UserInfo userInfo = new UserInfo();
        userInfo.setUserId("admin");
        userInfo.setUserName("管理员");

        String str = JsonUtils.obj2String(userInfo);
        boolean bool = redisUtils.set("admin", str);
        if(bool){
            return "设置成功";
        }else{
            return "设置失败";
        }
    }

    @RequestMapping("get_users")
    public Object getUser2() {
        List<UserInfo> list = (List<UserInfo>) redisUtils.get("user_list");
        return list;
    }

    @RequestMapping("set_users")
    public String setUsers() {
        UserInfo userInfo = new UserInfo();
        userInfo.setUserId("admin2");
        userInfo.setUserName("管理员2");

        UserInfo userInfo2 = new UserInfo();
        userInfo2.setUserId("admin3");
        userInfo2.setUserName("管理员3");

        List<UserInfo> list = new ArrayList<>();
        list.add(userInfo);
        list.add(userInfo2);


        boolean bool = redisUtils.set("user_list", list);
        if(bool){
            return "设置成功";
        }else{
            return "设置失败";
        }
    }
}

Redis 不仅可以 set/get 字符串，对象也是可以直接 set/get，但是需要注意的是，怎样 set，就该怎样 get