redis从入门到放弃
- 1.安装配置redis
- 2.先新建一个springboot项目
- 3.添加依赖(xml)
- 4.配置(yml)
- 5.配置文件Config(直接导入的)
- RedisConfig
- 6.redis的接口和实现(直接导入的。底层代码??)
- redisService
- redisServiceImpl
- 7.开始使用
- CacheService
- CacheServiceImpl
- 8.调用缓存接口
1.安装配置redis
管理员运行cmd
到安装目录下
redis-server.exe redis.windows.conf
window下启动redis服务报错:
creating server tcp listening socket 127.0.0.1:6379: bind No error
解决方案(按顺序输入以下)
redis-cli.exe
shutdown
exit
redis-server.exe redis.windows.conf
2.先新建一个springboot项目
3.添加依赖(xml)
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.13</version>
</dependency>
4.配置(yml)
spring:
redis:
# Redis数据库索引(默认为0)
database: 0
# Redis服务器地址
host: 127.0.0.1
# Redis服务器连接端口
port: 6379
# Redis服务器连接密码(默认为空)
password:
# 连接超时时间(毫秒)
timeout: 1000
jedis.pool:
# 连接池最大连接数(使用负值表示没有限制)
max-active: 8
# 连接池最大阻塞等待时间(使用负值表示没有限制)
max-wait: -1
# 连接池中的最大空闲连接
max-idle: 8
# 连接池中的最小空闲连接
min-idle: 0
5.配置文件Config(直接导入的)
项目下创建配置文件夹config
在文件夹下创建redis的配置文件
RedisConfig
package com.leaf.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
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.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* Redis配置类
*/
@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisSerializer<Object> serializer = redisSerializer();
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(redisConnectionFactory);
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(serializer);
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(serializer);
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Bean
public RedisSerializer<Object> redisSerializer() {
//创建JSON序列化器
Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class);
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
serializer.setObjectMapper(objectMapper);
return serializer;
}
}
6.redis的接口和实现(直接导入的。底层代码??)
在service下创建redisService
redisService
package com.leaf.service;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* redis操作Service
*/
public interface RedisService {
/**
* 保存属性
*/
void set(String key, Object value, long time);
/**
* 保存属性
*/
void set(String key, Object value);
/**
* 获取属性
*/
Object get(String key);
/**
* 删除属性
*/
Boolean del(String key);
/**
* 批量删除属性
*/
Long del(List<String> keys);
/**
* 设置过期时间
*/
Boolean expire(String key, long time);
/**
* 获取过期时间
*/
Long getExpire(String key);
/**
* 判断是否有该属性
*/
Boolean hasKey(String key);
/**
* 按delta递增
*/
Long incr(String key, long delta);
/**
* 按delta递减
*/
Long decr(String key, long delta);
/**
* 获取Hash结构中的属性
*/
Object hGet(String key, String hashKey);
/**
* 向Hash结构中放入一个属性
*/
Boolean hSet(String key, String hashKey, Object value, long time);
/**
* 向Hash结构中放入一个属性
*/
void hSet(String key, String hashKey, Object value);
/**
* 直接获取整个Hash结构
*/
Map<Object, Object> hGetAll(String key);
/**
* 直接设置整个Hash结构
*/
Boolean hSetAll(String key, Map<String, Object> map, long time);
/**
* 直接设置整个Hash结构
*/
void hSetAll(String key, Map<String, Object> map);
/**
* 删除Hash结构中的属性
*/
void hDel(String key, Object... hashKey);
/**
* 判断Hash结构中是否有该属性
*/
Boolean hHasKey(String key, String hashKey);
/**
* Hash结构中属性递增
*/
Long hIncr(String key, String hashKey, Long delta);
/**
* Hash结构中属性递减
*/
Long hDecr(String key, String hashKey, Long delta);
/**
* 获取Set结构
*/
Set<Object> sMembers(String key);
/**
* 向Set结构中添加属性
*/
Long sAdd(String key, Object... values);
/**
* 向Set结构中添加属性
*/
Long sAdd(String key, long time, Object... values);
/**
* 是否为Set中的属性
*/
Boolean sIsMember(String key, Object value);
/**
* 获取Set结构的长度
*/
Long sSize(String key);
/**
* 删除Set结构中的属性
*/
Long sRemove(String key, Object... values);
/**
* 获取List结构中的属性
*/
List<Object> lRange(String key, long start, long end);
/**
* 获取List结构的长度
*/
Long lSize(String key);
/**
* 根据索引获取List中的属性
*/
Object lIndex(String key, long index);
/**
* 向List结构中添加属性
*/
Long lPush(String key, Object value);
/**
* 向List结构中添加属性
*/
Long lPush(String key, Object value, long time);
/**
* 向List结构中批量添加属性
*/
Long lPushAll(String key, Object... values);
/**
* 向List结构中批量添加属性
*/
Long lPushAll(String key, Long time, Object... values);
/**
* 从List结构中移除属性
*/
Long lRemove(String key, long count, Object value);
}
在service下的Impl创建对应的实现
redisServiceImpl
package com.leaf.service.impl;
import com.leaf.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**
* redis操作实现类
*/
@Service
public class RedisServiceImpl implements RedisService {
@Autowired
private RedisTemplate redisTemplate;
@Override
public void set(String key, Object value, long time) {
redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
}
@Override
public void set(String key, Object value) {
redisTemplate.opsForValue().set(key, value);
}
@Override
public Object get(String key) {
return redisTemplate.opsForValue().get(key);
}
@Override
public Boolean del(String key) {
return redisTemplate.delete(key);
}
@Override
public Long del(List<String> keys) {
return redisTemplate.delete(keys);
}
@Override
public Boolean expire(String key, long time) {
return redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
@Override
public Long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
@Override
public Boolean hasKey(String key) {
return redisTemplate.hasKey(key);
}
@Override
public Long incr(String key, long delta) {
return redisTemplate.opsForValue().increment(key, delta);
}
@Override
public Long decr(String key, long delta) {
return redisTemplate.opsForValue().increment(key, -delta);
}
@Override
public Object hGet(String key, String hashKey) {
return redisTemplate.opsForHash().get(key, hashKey);
}
@Override
public Boolean hSet(String key, String hashKey, Object value, long time) {
redisTemplate.opsForHash().put(key, hashKey, value);
return expire(key, time);
}
@Override
public void hSet(String key, String hashKey, Object value) {
redisTemplate.opsForHash().put(key, hashKey, value);
}
@Override
public Map<Object, Object> hGetAll(String key) {
return redisTemplate.opsForHash().entries(key);
}
@Override
public Boolean hSetAll(String key, Map<String, Object> map, long time) {
redisTemplate.opsForHash().putAll(key, map);
return expire(key, time);
}
@Override
public void hSetAll(String key, Map<String, Object> map) {
redisTemplate.opsForHash().putAll(key, map);
}
@Override
public void hDel(String key, Object... hashKey) {
redisTemplate.opsForHash().delete(key, hashKey);
}
@Override
public Boolean hHasKey(String key, String hashKey) {
return redisTemplate.opsForHash().hasKey(key, hashKey);
}
@Override
public Long hIncr(String key, String hashKey, Long delta) {
return redisTemplate.opsForHash().increment(key, hashKey, delta);
}
@Override
public Long hDecr(String key, String hashKey, Long delta) {
return redisTemplate.opsForHash().increment(key, hashKey, -delta);
}
@Override
public Set<Object> sMembers(String key) {
return redisTemplate.opsForSet().members(key);
}
@Override
public Long sAdd(String key, Object... values) {
return redisTemplate.opsForSet().add(key, values);
}
@Override
public Long sAdd(String key, long time, Object... values) {
Long count = redisTemplate.opsForSet().add(key, values);
expire(key, time);
return count;
}
@Override
public Boolean sIsMember(String key, Object value) {
return redisTemplate.opsForSet().isMember(key, value);
}
@Override
public Long sSize(String key) {
return redisTemplate.opsForSet().size(key);
}
@Override
public Long sRemove(String key, Object... values) {
return redisTemplate.opsForSet().remove(key, values);
}
@Override
public List<Object> lRange(String key, long start, long end) {
return redisTemplate.opsForList().range(key, start, end);
}
@Override
public Long lSize(String key) {
return redisTemplate.opsForList().size(key);
}
@Override
public Object lIndex(String key, long index) {
return redisTemplate.opsForList().index(key, index);
}
@Override
public Long lPush(String key, Object value) {
return redisTemplate.opsForList().rightPush(key, value);
}
@Override
public Long lPush(String key, Object value, long time) {
Long index = redisTemplate.opsForList().rightPush(key, value);
expire(key, time);
return index;
}
@Override
public Long lPushAll(String key, Object... values) {
return redisTemplate.opsForList().rightPushAll(key, values);
}
@Override
public Long lPushAll(String key, Long time, Object... values) {
Long count = redisTemplate.opsForList().rightPushAll(key, values);
expire(key, time);
return count;
}
@Override
public Long lRemove(String key, long count, Object value) {
return redisTemplate.opsForList().remove(key, count, value);
}
}
7.开始使用
一般是在服务层,也就是service层
直接创建接口和实现吧
CacheService
package com.leaf.cache;
import com.leaf.model.TInfo;
import java.util.Map;
public interface CacheService {
void setCacheObject(String key, Object object);
Object getCacheObject(String key);
}
CacheServiceImpl
package com.leaf.cache.impl;
import com.leaf.cache.CacheService;
import com.leaf.service.RedisService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.Map;
@Slf4j
@Service
public class CacheServiceImpl implements CacheService {
@Autowired
private RedisService redisService;
// <key ,object>
@Override
public void setCacheObject(String key, Object object) {
redisService.set(key,object,60*60*24);
System.out.println("完成");
}
// <key,object>
@Override
public Object getCacheObject(String key) {
return redisService.get(key);
}
}
8.调用缓存接口
在需要的实体类对应的服务层,直接使用对应方法。使用方法参考底层redisServiceImpl