Redis是一个开源的支持网络可基于内存亦可持久化的日志型Key-Value数据库，并提供多种语言的API。它的值（value）可以是字符串（String）、哈希（Hash）、列表（list）、集合（sets）和有序集合（sorted sets）等类型。
一、Redis安装（以linux安装为例）
1.使用linux wget下载安装包
wget http://download.redis.io/releases/redis-3.0.0.tar.gz
2.将安装包拷贝到安装目录下如/usr/local
cp redis-3.0.0.rar.gz /usr/local
3.解压源码
tar -zxvf redis-3.0.0.tar.gz
4.进入解压后的目录进行编译
cd /usr/local/redis-3.0.0
5.安装到指定目录如/usr/local/redis
make PREFIX=/usr/local/redis install
6.进入源码目录，里面有一份配置文件 redis.conf，然后将其拷贝到安装路径下
cp /usr/local/redis-3.0.0/redis.conf /usr/local/redis
7.修改redis.conf配置文件， daemonize yes 以后端模式启动
vim /usr/local/redis/redis.conf
8.启动redis
cd /usr/local/redis
./bin/redis-server ./redis.conf
9.连接redis，查看现有redis密码
redis-cli
127.0.0.1:6379> config get requirepass
10.设置redis密码，成功后会返回“ok”字样
config set requirepass ****(****为你要设置的密码)
11.以密码登录redis
redis-cli -h 127.0.0.1 -p 6379 -a ****
二、SpringBoot配置使用redis
1.pom.xml添加redis依赖
<!-- redis缓存 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
2.application.properties添加数据源
#Redis 配置信息
#Redis数据库分片索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=localhost
# 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=
3.配置RedisConfig配置文件
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.lang.reflect.Method;
@Configuration
@EnableCaching//继承CachingConfigurerSupport并重写方法，配合该注解spring缓存框架的启用
public class RedisConfig extends CachingConfigurerSupport {
/*
载入通过配置文件配置的连接工厂
*/
@Autowired
private RedisConnectionFactory factory;
/*
重写缓存的key策略，可根据自身业务需要进行自己的配置生成条件
*/
@Bean
public KeyGenerator keyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
StringBuffer sb = new StringBuffer();
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
return sb.toString();
}
};
}
@Bean
public CacheManager cacheManager(RedisConnectionFactory connectionFactory){
RedisCacheManager rcm = RedisCacheManager.create(connectionFactory);
return rcm;
}
/**
* RedisTemplate配置
*/
@Bean
public RedisTemplate<String, Object> redisTemplate() {
// 配置redisTemplate
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
redisTemplate.setKeySerializer(new StringRedisSerializer());// key序列化
redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer(this.getClass().getClassLoader()));// value序列化
redisTemplate.setHashKeySerializer(new StringRedisSerializer());// Hash key序列化
redisTemplate.setHashValueSerializer(new JdkSerializationRedisSerializer(this.getClass().getClassLoader()));// Hash value序列化
redisTemplate.setConnectionFactory(factory);
return redisTemplate;
}
}
4.编写redis工具类
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 class RedisUtil {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
/*
指定缓存失效时间
*/
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
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/*
判断key是否存在
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
删除缓存
*/
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));
}
}
}
/*
普通缓存获取
*/
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/*
普通缓存放入
*/
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过期时间
*/
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
*/
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
*/
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);
}
/*
HashGet
*/
public Object hget(String key, String item) {
return redisTemplate.opsForHash().get(key, item);
}
/*
获取hashKey对应的所有键值
*/
public Map<Object, Object> hmget(String key) {
return redisTemplate.opsForHash().entries(key);
}
/*
HashSet
*/
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
*/
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
*/
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
*/
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
*/
public void hdel(String key, Object... item) {
redisTemplate.opsForHash().delete(key, item);
}
/*
判断hash表中是否有该项的值
*/
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
*/
public double hincr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, by);
}
/*
hash递减
*/
public double hdecr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, -by);
}
/*
根据key获取set中的所有值
*/
public Set<Object> sGet(String key) {
try {
return redisTemplate.opsForSet().members(key);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/*
根据value从一个set中查询，是否存在
*/
public boolean sHasKey(String key, Object value) {
try {
return redisTemplate.opsForSet().isMember(key, value);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
将set数据放入缓存
*/
public long sSet(String key, Object... values) {
try {
return redisTemplate.opsForSet().add(key, values);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/*
将set数据放入缓存并设置过期时间
*/
public long sSetAndTime(String key, long time, Object... values) {
try {
Long count = redisTemplate.opsForSet().add(key, values);
if (time > 0)
expire(key, time);
return count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/*
获取set缓存的长度
*/
public long sGetSetSize(String key) {
try {
return redisTemplate.opsForSet().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/*
移除值为value的
*/
public long setRemove(String key, Object... values) {
try {
Long count = redisTemplate.opsForSet().remove(key, values);
return count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/*
获取list缓存的内容
*/
public List<Object> lGet(String key, long start, long end) {
try {
return redisTemplate.opsForList().range(key, start, end);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/*
获取list缓存的长度
*/
public long lGetListSize(String key) {
try {
return redisTemplate.opsForList().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/*
通过索引获取list中的值
*/
public Object lGetIndex(String key, long index) {
try {
return redisTemplate.opsForList().index(key, index);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/*
将list放入缓存
*/
public boolean lSet(String key, Object value) {
try {
redisTemplate.opsForList().rightPush(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
将list放入缓存并设置过期时间
*/
public boolean lSet(String key, Object value, long time) {
try {
redisTemplate.opsForList().rightPush(key, value);
if (time > 0)
expire(key, time);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
将list放入缓存
*/
public boolean lSet(String key, List<Object> value) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
将list放入缓存并设置过期时间
*/
public boolean lSet(String key, List<Object> value, long time) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
if (time > 0)
expire(key, time);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
根据索引修改list中的某条数据
*/
public boolean lUpdateIndex(String key, long index, Object value) {
try {
redisTemplate.opsForList().set(key, index, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/*
移除N个值为value
*/
public long lRemove(String key, long count, Object value) {
try {
Long remove = redisTemplate.opsForList().remove(key, count, value);
return remove;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
}
5.测试连接是否成功
public class RedisUtilTest extends BaseTest {
@Autowired
private RedisUtil redisUtil;
@Test
public void redisTest(){
redisUtil.set("name","王二");
System.out.println(redisUtil.get("name"));
Map<String,Object> map=new HashMap<>();
map.put("name", "张三");
map.put("age", 24);
map.put("address", "塞尔维亚666");
redisUtil.hmset("15532002725", map,1000);
System.out.println(redisUtil.hmget("15532002725"));
}
}
6.shiro等其他程序中使用
//从redis缓存中查询缓存权限角色
String roleStr = stringRedisTemplate.opsForValue().get(userName);
if(roleStr!=null){
roles= JSON.parseArray(roleStr.toString(),String.class);
}else{
//从数据库查询权限放到redis中
roles=userService.getRoleByName(userName);
stringRedisTemplate.opsForValue().set(userName,JSON.toJSONString(roles));
}
//设置超时时间
stringRedisTemplate.expire(userName,TOKEN_EXPIRE_TIME, TimeUnit.SECONDS);
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from：https://blog.csdn.net/aliyacl/article/details/89150686
