Springboot整合Redis
Jedis操作redis
1.首先创建一个项目
2.导入jar包的坐标
<dependencies>
<!--导入jedis的包 -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
</dependencies>
3.进行测试
- 测试key
package com.hngc.jedis;
import redis.clients.jedis.Jedis;
import java.util.Set;
public class TestKey {
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1", 6379);
System.out.println("清空数据："+jedis.flushDB());
System.out.println("判断某个键是否存在："+jedis.exists("username"));
System.out.println("新增<'username','kuangshen'>的键值对："+jedis.set("username", "kuangshen"));
System.out.println("新增<'password','password'>的键值对："+jedis.set("password", "password"));
System.out.print("系统中所有的键如下：");
Set<String> keys = jedis.keys("*");
System.out.println(keys);
System.out.println("删除键password:"+jedis.del("password"));
System.out.println("判断键password是否存在："+jedis.exists("password"));
System.out.println("查看键username所存储的值的类型："+jedis.type("username"));
System.out.println("随机返回key空间的一个："+jedis.randomKey());
System.out.println("重命名key："+jedis.rename("username","name"));
System.out.println("取出改后的name："+jedis.get("name"));
System.out.println("按索引查询："+jedis.select(0));
System.out.println("删除当前选择数据库中的所有key："+jedis.flushDB());
System.out.println("返回当前数据库中key的数目："+jedis.dbSize());
System.out.println("删除所有数据库中的所有key："+jedis.flushAll());
}
}
- 测试String
package com.hngc.jedis;
import redis.clients.jedis.Jedis;
import java.util.concurrent.TimeUnit;
public class TestString {
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1", 6379);
jedis.flushDB();
System.out.println("===========增加数据===========");
System.out.println(jedis.set("key1","value1"));
System.out.println(jedis.set("key2","value2"));
System.out.println(jedis.set("key3", "value3"));
System.out.println("删除键key2:"+jedis.del("key2"));
System.out.println("获取键key2:"+jedis.get("key2"));
System.out.println("修改key1:"+jedis.set("key1", "value1Changed"));
System.out.println("获取key1的值："+jedis.get("key1"));
System.out.println("在key3后面加入值："+jedis.append("key3", "End"));
System.out.println("key3的值："+jedis.get("key3"));
System.out.println("增加多个键值对："+jedis.mset("key01","value01","key02","value02","key03","value03"));
System.out.println("获取多个键值对："+jedis.mget("key01","key02","key03"));
System.out.println("获取多个键值对："+jedis.mget("key01","key02","key03","key04"));
System.out.println("删除多个键值对："+jedis.del("key01","key02"));
System.out.println("获取多个键值对："+jedis.mget("key01","key02","key03"));
jedis.flushDB();
System.out.println("===========新增键值对防止覆盖原先值==============");
//Redis Setnx（SET if Not eXists） 命令在指定的 key 不存在时，为 key 设置指定的值。
System.out.println(jedis.setnx("key1", "value1"));
System.out.println(jedis.setnx("key2", "value2"));
System.out.println(jedis.setnx("key2", "value2-new"));
System.out.println(jedis.get("key1"));
System.out.println(jedis.get("key2"));
System.out.println("===========新增键值对并设置有效时间=============");
System.out.println(jedis.setex("key3", 2, "value3"));
System.out.println(jedis.get("key3"));
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(jedis.get("key3"));
System.out.println("===========获取原值，更新为新值==========");
System.out.println(jedis.getSet("key2", "key2GetSet"));
System.out.println(jedis.get("key2"));
System.out.println("获得key2的值的字串："+jedis.getrange("key2", 2, 4));
}
}
- 测试list
package com.hngc.jedis;
import redis.clients.jedis.Jedis;
public class TestList {
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1", 6379);
jedis.flushDB();
System.out.println("===========添加一个list===========");
jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");
jedis.lpush("collections", "HashSet");
jedis.lpush("collections", "TreeSet");
jedis.lpush("collections", "TreeMap");
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));//-1代表倒数第一个元素，-2代表倒数第二个元素,end为-1表示查询全部
System.out.println("collections区间0-3的元素："+jedis.lrange("collections",0,3));
System.out.println("===============================");
// 删除列表指定的值 ，第二个参数为删除的个数（有重复时），后add进去的值先被删，类似于出栈
System.out.println("删除指定元素个数："+jedis.lrem("collections", 2, "HashMap"));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("删除下表0-3区间之外的元素："+jedis.ltrim("collections", 0, 3));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("collections列表出栈（左端）："+jedis.lpop("collections"));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("collections添加元素，从列表右端，与lpush相对应："+jedis.rpush("collections", "EnumMap"));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("collections列表出栈（右端）："+jedis.rpop("collections"));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("修改collections指定下标1的内容："+jedis.lset("collections", 1, "LinkedArrayList"));
System.out.println("collections的内容："+jedis.lrange("collections", 0, -1));
System.out.println("===============================");
System.out.println("collections的长度："+jedis.llen("collections"));
System.out.println("获取collections下标为2的元素："+jedis.lindex("collections", 2));
System.out.println("===============================");
jedis.lpush("sortedList", "3","6","2","0","7","4");
System.out.println("sortedList排序前："+jedis.lrange("sortedList", 0, -1));
System.out.println(jedis.sort("sortedList"));
System.out.println("sortedList排序后："+jedis.lrange("sortedList", 0, -1));
}
}
- 测试set
package com.hngc.jedis;
import redis.clients.jedis.Jedis;
public class TestSet {
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1", 6379);
jedis.flushDB();
System.out.println("============向集合中添加元素（不重复）============");
System.out.println(jedis.sadd("eleSet", "e1","e2","e4","e3","e0","e8","e7","e5"));
System.out.println(jedis.sadd("eleSet", "e6"));
System.out.println(jedis.sadd("eleSet", "e6"));
System.out.println("eleSet的所有元素为："+jedis.smembers("eleSet"));
System.out.println("删除一个元素e0："+jedis.srem("eleSet", "e0"));
System.out.println("eleSet的所有元素为："+jedis.smembers("eleSet"));
System.out.println("删除两个元素e7和e6："+jedis.srem("eleSet", "e7","e6"));
System.out.println("eleSet的所有元素为："+jedis.smembers("eleSet"));
System.out.println("随机的移除集合中的一个元素："+jedis.spop("eleSet"));
System.out.println("随机的移除集合中的一个元素："+jedis.spop("eleSet"));
System.out.println("eleSet的所有元素为："+jedis.smembers("eleSet"));
System.out.println("eleSet中包含元素的个数："+jedis.scard("eleSet"));
System.out.println("e3是否在eleSet中："+jedis.sismember("eleSet", "e3"));
System.out.println("e1是否在eleSet中："+jedis.sismember("eleSet", "e1"));
System.out.println("e1是否在eleSet中："+jedis.sismember("eleSet", "e5"));
System.out.println("=================================");
System.out.println(jedis.sadd("eleSet1", "e1","e2","e4","e3","e0","e8","e7","e5"));
System.out.println(jedis.sadd("eleSet2", "e1","e2","e4","e3","e0","e8"));
System.out.println("将eleSet1中删除e1并存入eleSet3中："+jedis.smove("eleSet1", "eleSet3", "e1"));//移到集合元素
System.out.println("将eleSet1中删除e2并存入eleSet3中："+jedis.smove("eleSet1", "eleSet3", "e2"));
System.out.println("eleSet1中的元素："+jedis.smembers("eleSet1"));
System.out.println("eleSet3中的元素："+jedis.smembers("eleSet3"));
System.out.println("============集合运算=================");
System.out.println("eleSet1中的元素："+jedis.smembers("eleSet1"));
System.out.println("eleSet2中的元素："+jedis.smembers("eleSet2"));
System.out.println("eleSet1和eleSet2的交集:"+jedis.sinter("eleSet1","eleSet2"));
System.out.println("eleSet1和eleSet2的并集:"+jedis.sunion("eleSet1","eleSet2"));
System.out.println("eleSet1和eleSet2的差集:"+jedis.sdiff("eleSet1","eleSet2"));//eleSet1中有，eleSet2中没有
jedis.sinterstore("eleSet4","eleSet1","eleSet2");//求交集并将交集保存到dstkey的集合
System.out.println("eleSet4中的元素："+jedis.smembers("eleSet4"));
}
}
- 测试hash
package com.hngc.jedis;
import redis.clients.jedis.Jedis;
import java.util.HashMap;
import java.util.Map;
public class TestHash {
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1", 6379);
jedis.flushDB();
Map<String,String> map = new HashMap<String,String>();
map.put("key1","value1");
map.put("key2","value2");
map.put("key3","value3");
map.put("key4","value4");
//添加名称为hash（key）的hash元素
jedis.hmset("hash",map);
//向名称为hash的hash中添加key为key5，value为value5元素
jedis.hset("hash", "key5", "value5");
System.out.println("散列hash的所有键值对为："+jedis.hgetAll("hash"));//return Map<String,String>
System.out.println("散列hash的所有键为："+jedis.hkeys("hash"));//return Set<String>
System.out.println("散列hash的所有值为："+jedis.hvals("hash"));//return List<String>
System.out.println("将key6保存的值加上一个整数，如果key6不存在则添加key6："+jedis.hincrBy("hash", "key6", 6));
System.out.println("散列hash的所有键值对为："+jedis.hgetAll("hash"));
System.out.println("将key6保存的值加上一个整数，如果key6不存在则添加key6："+jedis.hincrBy("hash", "key6", 3));
System.out.println("散列hash的所有键值对为："+jedis.hgetAll("hash"));
System.out.println("删除一个或者多个键值对："+jedis.hdel("hash", "key2"));
System.out.println("散列hash的所有键值对为："+jedis.hgetAll("hash"));
System.out.println("散列hash中键值对的个数："+jedis.hlen("hash"));
System.out.println("判断hash中是否存在key2："+jedis.hexists("hash","key2"));
System.out.println("判断hash中是否存在key3："+jedis.hexists("hash","key3"));
System.out.println("获取hash中的值："+jedis.hmget("hash","key3"));
System.out.println("获取hash中的值："+jedis.hmget("hash","key3","key4"));
}
}
- 测试Zset
测试事务
package com.hngc.jedis;
import com.alibaba.fastjson.JSONObject;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Transaction;
public class TestMulti {
public static void main(String[] args) {
//创建客户端连接服务端，redis服务端需要被开启
Jedis jedis = new Jedis("127.0.0.1", 6379);
jedis.flushDB();
JSONObject jsonObject = new JSONObject();
jsonObject.put("hello", "world");
jsonObject.put("name", "java");
//开启事务
Transaction multi = jedis.multi();
String result = jsonObject.toJSONString();
try{
//向redis存入一条数据
multi.set("json", result);
//再存入一条数据
multi.set("json2", result);
//这里引发了异常，用0作为被除数
//int i = 100/0;
//如果没有引发异常，执行进入队列的命令
multi.exec();
}catch(Exception e){
e.printStackTrace();
//如果出现异常，回滚
multi.discard();
}finally{
System.out.println(jedis.get("json"));
System.out.println(jedis.get("json2"));
//最终关闭客户端
jedis.close();
}
}
}
springboot整合redis
1.首先创建springboot项目，勾选所需要的骨架
springboot2.x以后原来的jedis被替换成了lettuce
- jedis:采用的是直连,多个线程操作的时候不安全，想要避免不安全需要使用jedis pool连接池。
- lettuce:采用netty，实例可以在多个线程中共享，不存在线程不安全的情况。
2.进行连接配置application.properties
# 配置redis连接信息
spring.redis.host=127.0.0.1
spring.redis.port=6379
3.进行测试
@SpringBootTest
class Springboot10RedisApplicationTests {
@Autowired
private RedisTemplate redisTemplate;
/**
* opsForValue 操作字符串 相当于String
* opsForList 操作list
* opsForSet 操作set
* opsForHash 操作hash
* opsForZSet 操作Zset
* opsForGeo 操作地理位置
* opsForHyperLogLog 操作基数统计
*
*/
@Test
void contextLoads() {
redisTemplate.opsForValue().set("mykey","你好");
System.out.println(redisTemplate.opsForValue().get("mykey"));
}
}
自定义RedisConfig
package com.hngc.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
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.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
public class RedisConfig {
@Bean
@SuppressWarnings("all")
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
template.setConnectionFactory(factory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
// key采用String的序列化方式
template.setKeySerializer(stringRedisSerializer);
// hash的key也采用String的序列化方式
template.setHashKeySerializer(stringRedisSerializer);
// value序列化方式采用jackson
template.setValueSerializer(jackson2JsonRedisSerializer);
// hash的value序列化方式采用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
常用的Redis工具类
package com.hngc.utils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@Component
public final class RedisUtil {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
// =common
/**
* 指定缓存失效时间
* @param key 键
* @param time 时间(秒)
*/
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 根据key 获取过期时间
* @param key 键 不能为null
* @return 时间(秒) 返回0代表为永久有效
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/**
* 判断key是否存在
* @param key 键
* @return true 存在 false不存在
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 删除缓存
* @param key 可以传一个值 或多个
*/
@SuppressWarnings("unchecked")
public void del(String... key) {
if (key != null && key.length > 0) {
if (key.length == 1) {
redisTemplate.delete(key[0]);
} else {
redisTemplate.delete(CollectionUtils.arrayToList(key));
}
}
}
// String=
/**
* 普通缓存获取
* @param key 键
* @return 值
*/
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/**
* 普通缓存放入
* @param key 键
* @param value 值
* @return true成功 false失败
*/
public boolean set(String key, Object value) {
try {
redisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 普通缓存放入并设置时间
* @param key 键
* @param value 值
* @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
* @return true成功 false 失败
*/
public boolean set(String key, Object value, long time) {
try {
if (time > 0) {
redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
} else {
set(key, value);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 递增
* @param key 键
* @param delta 要增加几(大于0)
*/
public long incr(String key, long delta) {
if (delta < 0) {
throw new RuntimeException("递增因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, delta);
}
/**
* 递减
* @param key 键
* @param delta 要减少几(小于0)
*/
public long decr(String key, long delta) {
if (delta < 0) {
throw new RuntimeException("递减因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, -delta);
}
// Map=
/**
* HashGet
* @param key 键 不能为null
* @param item 项 不能为null
*/
public Object hget(String key, String item) {
return redisTemplate.opsForHash().get(key, item);
}
/**
* 获取hashKey对应的所有键值
* @param key 键
* @return 对应的多个键值
*/
public Map<Object, Object> hmget(String key) {
return redisTemplate.opsForHash().entries(key);
}
/**
* HashSet
* @param key 键
* @param map 对应多个键值
*/
public boolean hmset(String key, Map<String, Object> map) {
try {
redisTemplate.opsForHash().putAll(key, map);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* HashSet 并设置时间
* @param key 键
* @param map 对应多个键值
* @param time 时间(秒)
* @return true成功 false失败
*/
public boolean hmset(String key, Map<String, Object> map, long time) {
try {
redisTemplate.opsForHash().putAll(key, map);
if (time > 0) {
expire(key, time);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 向一张hash表中放入数据,如果不存在将创建
*
* @param key 键
* @param item 项
* @param value 值
* @return true 成功 false失败
*/
public boolean hset(String key, String item, Object value) {
try {
redisTemplate.opsForHash().put(key, item, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 向一张hash表中放入数据,如果不存在将创建
*
* @param key 键
* @param item 项
* @param value 值
* @param time 时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间
* @return true 成功 false失败
*/
public boolean hset(String key, String item, Object value, long time) {
try {
redisTemplate.opsForHash().put(key, item, value);
if (time > 0) {
expire(key, time);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 删除hash表中的值
*
* @param key 键 不能为null
* @param item 项 可以使多个 不能为null
*/
public void hdel(String key, Object... item) {
redisTemplate.opsForHash().delete(key, item);
}
/**
* 判断hash表中是否有该项的值
*
* @param key 键 不能为null
* @param item 项 不能为null
* @return true 存在 false不存在
*/
public boolean hHasKey(String key, String item) {
return redisTemplate.opsForHash().hasKey(key, item);
}
/**
* hash递增 如果不存在,就会创建一个 并把新增后的值返回
*
* @param key 键
* @param item 项
* @param by 要增加几(大于0)
*/
public double hincr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, by);
}
/**
* hash递减
*
* @param key 键
* @param item 项
* @param by 要减少记(小于0)
*/
public double hdecr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, -by);
}
// set=
/**
* 根据key获取Set中的所有值
* @param key 键
*/
public Set
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