SpringBoot配置Redis实现保存获取和删除数据

2024-04-02 19:04:59 166人浏览八月长安

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摘要

目录1 Redis2 Maven依赖3 application.propertis4 RedisConfig5 RedisService6 调试代码 7 调试结果

1 Redis

Redis 是完全开源的，遵守 BSD 协议，是一个高性能的 key-value 数据库。

Redis 与其他 key - value 缓存产品有以下三个特点：

（1）Redis支持数据的持久化，可以将内存中的数据保存在磁盘中，重启的时候可以再次加载进行使用。

（2）Redis不仅仅支持简单的key-value类型的数据，同时还提供list，set，zset，hash等数据结构的存储。

（2）Redis支持数据的备份，即master-slave模式的数据备份。

2 Maven依赖


        <!--redis缓存-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
 
        <!-- 阿里JSON解析器 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>

3 application.propertis


# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=127.0.0.1
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.passWord=
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.jedis.pool.max-active=20
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.jedis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.jedis.pool.max-idle=10
# 连接池中的最小空闲连接
spring.redis.jedis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=1000

4 RedisConfig

Redis配置文件。


package com.config;
 
import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer;
import org.springframework.context.annotation.*;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
@Configuration
public class RedisConfig {
    @Bean
    @SuppressWarnings(value = { "unchecked", "rawtypes" })
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory)
    {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);
 
        FastJsonRedisSerializer serializer = new FastJsonRedisSerializer(Object.class);
        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        template.seTKEySerializer(new StringRedisSerializer());
        template.setValueSerializer(serializer);
 
        // Hash的key也采用StringRedisSerializer的序列化方式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(serializer);
 
        template.afterPropertiesSet();
        return template;
    }
}

5 RedisService

Redis基本操作方法。


package com.service;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;
 
import java.util.*;
import java.util.concurrent.TimeUnit;
 
@Service
public class RedisService {
    @Autowired
    private RedisTemplate redisTemplate;
 
    
    public <T> void setCacheObject(final String key, final T value) {
        redisTemplate.opsForValue().set(key, value);
    }
 
    
    public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit) {
        redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
    }
 
    
    public boolean expire(final String key, final long timeout) {
        return expire(key, timeout, TimeUnit.SECONDS);
    }
 
    
    public boolean expire(final String key, final long timeout, final TimeUnit unit) {
        return redisTemplate.expire(key, timeout, unit);
    }
 
    
    public <T> T getCacheObject(final String key) {
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }
 
    
    public boolean deleteObject(final String key) {
        return redisTemplate.delete(key);
    }
 
    
    public long deleteObject(final Collection collection) {
        return redisTemplate.delete(collection);
    }
 
    
    public <T> long setCacheList(final String key, final List<T> dataList) {
        Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
        return count == null ? 0 : count;
    }
 
    
    public <T> List<T> getCacheList(final String key) {
        return redisTemplate.opsForList().range(key, 0, -1);
    }
 
    
    public <T> BoundSetOperations<String, T> setCacheSet(final String key, final Set<T> dataSet) {
        BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
        Iterator<T> it = dataSet.iterator();
        while (it.hasNext()) {
            setOperation.add(it.next());
        }
        return setOperation;
    }
 
    
    public <T> Set<T> getCacheSet(final String key) {
        return redisTemplate.opsForSet().members(key);
    }
 
    
    public <T> void setCacheMap(final String key, final Map<String, T> dataMap) {
        if (dataMap != null) {
            redisTemplate.opsForHash().putAll(key, dataMap);
        }
    }
 
    
    public <T> Map<String, T> getCacheMap(final String key) {
        return redisTemplate.opsForHash().entries(key);
    }
 
    
    public <T> void setCacheMapValue(final String key, final String hKey, final T value) {
        redisTemplate.opsForHash().put(key, hKey, value);
    }
 
    
    public <T> T getCacheMapValue(final String key, final String hKey) {
        HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
        return opsForHash.get(key, hKey);
    }
 
    
    public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys) {
        return redisTemplate.opsForHash().multiGet(key, hKeys);
    }
 
    
    public Collection<String> keys(final String pattern) {
        return redisTemplate.keys(pattern);
    }
}

6 调试代码


package com.controller;
 
import com.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.WEB.bind.annotation.*;
 
@RestController
@RequestMapping("/redis")
public class RedisController {
    @Autowired
    private RedisService redisService;
 
    
    @PostMapping("/setValue/{key}/{value}")
    public String setValue(@PathVariable("key") String key, @PathVariable("value") String value) {
        redisService.setCacheObject(key, value);
        return "保存成功";
    }
 
    
    @GetMapping("/getValue")
    public String getValue(@RequestParam String key) {
        return redisService.getCacheObject(key);
    }
 
    
    @DeleteMapping("/deleteValue/{key}")
    public String deleteValue(@PathVariable("key") String key) {
        return redisService.deleteObject(key) ? "删除成功" : "删除失败";
    }
}