一:创建maven项目,在pom.xml文件添加springboot和spring-data-redis依赖,别忘了写springboot 启动类
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.7.5</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
二、redis配置文件(也可以写在yml文件中)
import com.ylyao.util.RedisUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.*;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPoolConfig;
import java.util.HashSet;
import java.util.Set;
/**
* @date 2018/9/21
*/
@Configuration
public class RedisConfig {
/**
* redis的服务和密码
*/
private static final String host = "127.0.0.1";
private static final int port = 6379;
private static final String password = "password";
/**
* JedisPoolConfig 连接池配置
*
* @return 连接池对象
*/
@Bean
public JedisPoolConfig jedisPoolConfig() {
Integer maxIdle = 10;
Integer maxTotal = 100;
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
// 最大空闲数
jedisPoolConfig.setMaxIdle(maxIdle);
// 连接池的最大数据库连接数
jedisPoolConfig.setMaxTotal(maxTotal);
// 最大建立连接等待时间
return jedisPoolConfig;
}
/**
* 根据配置文件生成Redis连接工厂对象
*
* @return Redis连接工厂
*/
@Bean
public JedisConnectionFactory jedisconnectionfactory() {
String mode = "sentinel";
if ("single".equals(mode)) {
return generateSingleJedisConnectionFactory();
} else if ("sentinel".equals(mode)) {
return generateSentinelJedisConnectionFactory();
} else if ("cluster".equals(mode)) {
return generateClusterJedisConnectionFactory();
}
return null;
}
/**
* 生成哨兵Redis连接工厂
*
* @return Redis连接工厂
*/
private JedisConnectionFactory generateSentinelJedisConnectionFactory() {
RedisSentinelConfiguration redisSentinelConfiguration = new RedisSentinelConfiguration()
.master("mymaster")
.sentinel(host, port);
redisSentinelConfiguration.setPassword(RedisPassword.of(password));
return new JedisConnectionFactory(redisSentinelConfiguration, jedisPoolConfig());
}
/**
* 生成单点Redis连接工厂
*
* @return Redis连接工厂
*/
private JedisConnectionFactory generateSingleJedisConnectionFactory() {
RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(host, port);
redisStandaloneConfiguration.setPassword(RedisPassword.of(password));
JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcf = (JedisClientConfiguration.JedisPoolingClientConfigurationBuilder) JedisClientConfiguration.builder();
//修改我们的连接池配置
jpcf.poolConfig(jedisPoolConfig());
//通过构造器来构造jedis客户端配置
JedisClientConfiguration jedisClientConfiguration = jpcf.build();
return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration);
}
/**
* 生成集群Redis连接工厂
*
* @return Redis连接工厂
*/
private JedisConnectionFactory generateClusterJedisConnectionFactory() {
RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
String clusterNodes = "";
int maxRedirects = 3;
String[] serverArray = clusterNodes.split(",");
Set<RedisNode> nodes = new HashSet<RedisNode>();
for (String ipPort : serverArray) {
String[] ipAndPort = ipPort.split(":");
nodes.add(new RedisNode(ipAndPort[0].trim(), Integer.valueOf(ipAndPort[1])));
}
redisClusterConfiguration.setClusterNodes(nodes);
redisClusterConfiguration.setMaxRedirects(maxRedirects);
return new JedisConnectionFactory(redisClusterConfiguration, jedisPoolConfig());
}
/**
* 注入自定义RedisTemplate
*
* @param redisConnectionFactory 自定义连接工厂
* @return 自定义RedisTemplate
*/
@Bean
public RedisTemplate<String, Object> customRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
initDomainRedisTemplate(redisTemplate, redisConnectionFactory);
return redisTemplate;
}
/**
* 设置数据存入 redis 的序列化方式,并开启事务
*
* @param redisTemplate redis模板
* @param factory Redis连接工厂
*/
private void initDomainRedisTemplate(RedisTemplate<String, Object> redisTemplate, RedisConnectionFactory factory) {
//如果不配置Serializer,那么存储的时候缺省使用String,如果用User类型存储,那么会提示错误User can't cast to String!
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
// 开启事务
redisTemplate.setEnableTransactionSupport(true);
redisTemplate.setConnectionFactory(factory);
}
/**
* 注入封装RedisTemplate
*
* @param redisTemplate redis模板
* @return 注入工具类
*/
@Bean(name = "redisUtils")
public RedisUtils redisUtil(RedisTemplate<String, Object> redisTemplate) {
RedisUtils redisUtil = new RedisUtils();
redisUtil.setRedisTemplate(redisTemplate);
return redisUtil;
}
}
三、配置文件中注入了redisUtil是封装了RedisTemplate操作类,方便使用,(也可直接使用RedisTemplate类)
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.beanutils.BeanUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.CollectionUtils;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/***
* @date 2018/9/25 15:07
* @description:
*/
public class RedisSDK {
/**
* 日志
*/
public static final Logger LOG = LoggerFactory.getLogger(RedisSDK.class);
private RedisTemplate<String, Object> redisTemplate;
private static final String TEMP_STR1 = ",value:";
public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
this.redisTemplate = redisTemplate;
}
//=============================common============================
/**
* 指定缓存失效时间
*
* @param key 键
* @param time 时间(秒)
* @return
*/
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));
}
}
}
//============================操作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);
}
public String getString(String key) {
Object result = get(key);
return result == null ? null : result.toString();
}
/**
* 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;
}
}
/**
* 判断是否存在
* @param key
* @return
*/
public boolean exists(String key) {
try {
return redisTemplate.execute(new RedisCallback<Boolean>() {
@Override
public Boolean doInRedis(RedisConnection redisConnection) throws DataAccessException {
return redisConnection.exists(key.getBytes());
}
});
} catch (Exception e) {
LOG.error("", e);
}
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 by 要增加几(大于0)
* @return
*/
public long incr(String key, long by) {
if (by < 0) {
throw new RuntimeException("递增因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, by);
}
/**
* 递减
*
* @param key 键
* @param by 要减少几(小于0)
* @return
*/
public long decr(String key, long by) {
if (by < 0) {
throw new RuntimeException("递减因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, -by);
}
//===============================操作Map=================================
/**
* HashGet
*
* @param key 键 不能为null
* @param item 项 不能为null
* @return 值
*/
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
* @return true 成功 false 失败
*/
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)
* @return
*/
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)
* @return
*/
public double hdecr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, -by);
}
/**
* @param key
* @return
*/
public <T> T hgetAll(String key, Class<T> clazz) {
try {
Map<Object, Object> values = hmget(key);
LOG.info("redis获取值,key:" + key + TEMP_STR1 + JSONObject.toJSONString(values));
String json = JSONObject.toJSONString(values);
Map<String, String> all = (Map) JSONObject.parse(json);
T t = clazz.newInstance();
BeanUtils.populate(t, all);
return t;
} catch (Exception e) {
LOG.info("redis获取值,key:" + key + "失败");
}
return null;
}
//============================操作set=============================
/**
* 根据key获取Set中的所有值
*
* @param key 键
* @return
*/
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
*
* @param key 键
* @param value 值
* @return true 存在 false不存在
*/
public boolean sHasKey(String key, Object value) {
try {
return redisTemplate.opsForSet().isMember(key, value);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 将数据放入set缓存
*
* @param key 键
* @param values 值 可以是多个
* @return 成功个数
*/
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
*
* @param key 键
* @param time 时间(秒)
* @param values 值 可以是多个
* @return 成功个数
*/
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 == null ? 0L : count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 获取set缓存的长度
*
* @param key 键
* @return
*/
public long sGetSetSize(String key) {
try {
Long size = redisTemplate.opsForSet().size(key);
return size == null ? 0L : size;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 移除值为value的
*
* @param key 键
* @param values 值 可以是多个
* @return 移除的个数
*/
public long setRemove(String key, Object... values) {
try {
Long count = redisTemplate.opsForSet().remove(key, values);
return count == null ? 0L : count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
//===============================操作list=================================
/**
* 获取list缓存的内容
*
* @param key 键
* @param start 开始
* @param end 结束 0 到 -1代表所有值
* @return
*/
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
*
* @param key 键
* @return
*/
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
*
* @param key 键
* @param index 索引 index>=0时, 0 表头,1 第二个元素,依次类推;index<0时,-1,表尾,-2倒数第二个元素,依次类推
* @return
*/
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
*
* @param key 键
* @param value 值
* @return
*/
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
*
* @param key 键
* @param value 值
* @param time 时间(秒)
* @return
*/
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
*
* @param key 键
* @param value 值
* @return
*/
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
*
* @param key 键
* @param value 值
* @param time 时间(秒)
* @return
*/
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
*
* @param key 键
* @param index 索引
* @param value 值
* @return
*/
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
*
* @param key 键
* @param count 移除多少个
* @param value 值
* @return 移除的个数
*/
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;
}
}
/**
* 发布消息
*
* @param channel
* @param message
*/
public void sendMessage(String channel, Serializable message) {
redisTemplate.convertAndSend(channel, message);
}
}
四:测试
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;
/**
* @date 2018/9/21
*/
@Service
public class TaskService {
@Autowired
private RedisUtils redisUtils;
@PostConstruct
public void test() {
redisUtils.set("name", "测试");
System.out.println(redisUtils.get("name"));
}
}
输出: