我使用的版本是SpringBoot 2.6.4
可以实现注入不同的库连接或是动态切换库
org.springframework.boot
spring-boot-starter-parent
2.6.4
org.springframework.boot
spring-boot-starter-data-redis
spring:
redis:
# open自定义的，使用aop切面控制
open: false # 是否开启redis缓存 true开启 false关闭
database: 0
host: 127.0.0.1
password: 123456
# history 自定义，切换库索引
history: 1 #历史数据使用的库
port: 6379
timeout: 6000ms # 连接超时时长（毫秒）
jedis:
pool:
max-active: 1000 # 连接池最大连接数（使用负值表示没有限制）
max-wait: -1ms # 连接池最大阻塞等待时间（使用负值表示没有限制）
max-idle: 10 # 连接池中的最大空闲连接
min-idle: 5 # 连接池中的最小空闲连接
配置类 , 默认0号库使用@Autowired注入，自定义库使用@Resource(name = “history”)注入
动态切库有个问题就是一旦切库 后面的数据就会一直保存在切换的库里面，比如实时数据需要保存在1号库，历史数据需要保存在2号库，切库后 实时的就会存历史里面、下面这种配置，想用哪个库就注入哪个库，不存在切库问题
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.*;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.time.Duration;
@Configuration
public class RedisConfig {
@Autowired
private RedisConnectionFactory factory;
@Value("${spring.redis.host}")
private String host;
@Value("${spring.redis.port}")
private Integer port;
@Value("${spring.redis.password}")
private String password;
@Value("${spring.redis.history}")
private Integer history;
@Bean
public RedisTemplate redisTemplate() {
RedisTemplate template = new RedisTemplate<>();
// 解决value不能转成string chens 2022-06-08
Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
template.setKeySerializer(new StringRedisSerializer());
template.setHashKeySerializer(new StringRedisSerializer());
template.setHashValueSerializer(new StringRedisSerializer());
template.setValueSerializer(serializer);
template.setConnectionFactory(factory);
return template;
}
@Bean("history")
public RedisTemplate redisTemplatetwo() {
RedisTemplate template = new RedisTemplate<>();
// 解决value不能转成string
Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
template.setKeySerializer(new StringRedisSerializer());
template.setHashKeySerializer(new StringRedisSerializer());
template.setHashValueSerializer(new StringRedisSerializer());
template.setValueSerializer(serializer);
RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
// 建立连接，设置库索引
redisStandaloneConfiguration.setDatabase(history);
redisStandaloneConfiguration.setHostName(host);
redisStandaloneConfiguration.setPort(port);
redisStandaloneConfiguration.setPassword(RedisPassword.of(password));
LettuceConnectionFactory factory = new LettuceConnectionFactory(redisStandaloneConfiguration, LettuceClientConfiguration.builder()
// 超时时间
.commandTimeout(Duration.ofMinutes(30)).build());
factory.afterPropertiesSet();
template.setConnectionFactory(factory);
return template;
}
@Bean
public HashOperations hashOperations(RedisTemplate redisTemplate) {
return redisTemplate.opsForHash();
}
@Bean
public ValueOperations valueOperations(RedisTemplate redisTemplate) {
return redisTemplate.opsForValue();
}
@Bean
public ListOperations listOperations(RedisTemplate redisTemplate) {
return redisTemplate.opsForList();
}
@Bean
public SetOperations setOperations(RedisTemplate redisTemplate) {
return redisTemplate.opsForSet();
}
@Bean
public ZSetOperations zSetOperations(RedisTemplate redisTemplate) {
return redisTemplate.opsForZSet();
}
}
工具类，setDbIndex()动态切换库，方法调用完成应切回默认库
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
@Component
public class RedisUtils {
@Autowired
private RedisTemplate redisTemplate;
@Resource(name = "history")
private RedisTemplate historyTemplate;
@Autowired
private ValueOperations valueOperations;
@Autowired
private HashOperations hashOperations;
@Autowired
private ListOperations listOperations;
@Autowired
private SetOperations setOperations;
@Autowired
private ZSetOperations zSetOperations;
// 默认数据库
private static Integer database = 0;
public final static long DEFAULT_EXPIRE = 60 * 60 * 24;
public final static long NOT_EXPIRE = -1;
private final static Gson gson = new Gson();
public void set(String key, Object value, long expire) {
valueOperations.set(key, toJson(value));
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
}
public void set(Integer index, String key, Object value, long expire) {
setDbIndex(index);
valueOperations.set(key, toJson(value));
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
}
public void set(String key, Object value) {
set(key, value, DEFAULT_EXPIRE);
}
public void set(Integer index, String key, Object value) {
setDbIndex(index);
set(key, value, DEFAULT_EXPIRE);
}
public T get(String key, Class clazz, long expire) {
String value = valueOperations.get(key);
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
return value == null ? null : fromJson(value, clazz);
}
public T get(Integer index, String key, Class clazz, long expire) {
setDbIndex(index);
String value = valueOperations.get(key);
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
return value == null ? null : fromJson(value, clazz);
}
// 获取实时数据集合 chens
public List getList(List keys, Class clazz) {
List list = new LinkedList<>();
if (keys.size() < 1) return list;
for (String key : keys) {
T t = get(key, clazz, NOT_EXPIRE);
if (t != null) {
list.add(t);
}
}
//keys.forEach(i -> list.add(get(i, clazz, NOT_EXPIRE)));
return list;
}
public T get(String key, Class clazz) {
return get(key, clazz, NOT_EXPIRE);
}
public T get(Integer index, String key, Class clazz) {
setDbIndex(index);
return get(key, clazz, NOT_EXPIRE);
}
public String get(String key, long expire) {
String value = valueOperations.get(key);
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
return value;
}
public String get(Integer index, String key, long expire) {
setDbIndex(index);
String value = valueOperations.get(key);
if (expire != NOT_EXPIRE) {
redisTemplate.expire(key, expire, TimeUnit.SECONDS);
}
return value;
}
public String get(String key) {
return get(key, NOT_EXPIRE);
}
public String get(Integer index, String key) {
setDbIndex(index);
return get(key, NOT_EXPIRE);
}
public void delete(String key) {
redisTemplate.delete(key);
}
public void delete(Integer index, String key) {
setDbIndex(index);
redisTemplate.delete(key);
}
private String toJson(Object object) {
if (object instanceof Integer || object instanceof Long || object instanceof Float ||
object instanceof Double || object instanceof Boolean || object instanceof String) {
return String.valueOf(object);
}
return gson.toJson(object);
}
private T fromJson(String json, Class clazz) {
//T t = JSONObject.parseObject(json, clazz);
return gson.fromJson(json, clazz);
}
private void setDbIndex(Integer dbIndex) {
// 边界判断
if (dbIndex == null || dbIndex > 15 || dbIndex < 0) {
dbIndex = database;
}
LettuceConnectionFactory redisConnectionFactory = (LettuceConnectionFactory) redisTemplate
.getConnectionFactory();
if (redisConnectionFactory == null) {
return;
}
redisConnectionFactory.setDatabase(dbIndex);
redisTemplate.setConnectionFactory(redisConnectionFactory);
// 属性设置后
redisConnectionFactory.afterPropertiesSet();
// 重置连接
redisConnectionFactory.resetConnection();
}
}
