目录
Jedis常用操作
引入依赖:
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>3.2.0</version>
</dependency>
创建测试程序
import redis.clients.jedis.Jedis;
public class Demo01 {
public static void main(String[] args) {
//创建redis对象
Jedis jedis = new Jedis("192.168.137.3",6379);
//ping()方法,如果连接成功则会返回一个值,否则报错
String pong = jedis.ping();
System.out.println("连接成功:"+pong);
jedis.close();
}
}
禁用Linux的防火墙:Linux(CentOS7)里执行命令(关闭防火墙之后,一定要重启)
systemctl stop/disable firewalld.service
redis.conf中注释掉bind 127.0.0.1 ,然后 protected-mode no
如果之前设置过密码的话,要在创建对象后设置auth
jedis.auth(“你的密码”);一定要放在,Jedis jedis = new Jedis(“”);下面
测试相关数据类型
Jedis-API: Key
@Test
public void demo1(){
//创建redis对象
Jedis jedis = new Jedis("192.168.137.3",6379);
//添加key
jedis.set("k1", "v1");
jedis.set("k2", "v2");
jedis.set("k3", "v3");
//参数为“*”表示得到所有的key,返回一个Set集合
Set<String> keys = jedis.keys("*");
System.out.println(keys.size());
for (String key : keys) {
System.out.println(key);
}
System.out.println(jedis.exists("k1"));
System.out.println(jedis.ttl("k1"));
System.out.println(jedis.get("k1"));
}
Jedis-API: String
//设置多个key-value
jedis.mset("str1","v1","str2","v2","str3","v3");
List<String> mget = jedis.mget("str1","str2","str3");
System.out.println(mget);//输出相应的value
Jedis-API: List
jedis.lpush("mylist","lucy","mary","jack");
List<String> list = jedis.lrange("mylist",0,-1);//把所有值都取出来
for (String element : list) {
System.out.println(element);
}
Jedis-API: set
//注意key的名字不要和之前冲突
jedis.sadd("orders", "order01");
jedis.sadd("orders", "order02");
jedis.sadd("orders", "order03");
jedis.sadd("orders", "order04");
Set<String> smembers = jedis.smembers("orders");
for (String order : smembers) {
System.out.println(order);
}
jedis.srem("orders", "order02");
Jedis-API: hash
jedis.hset("hash1","userName","lisi");
System.out.println(jedis.hget("hash1","userName"));
Map<String,String> map = new HashMap<String,String>();
map.put("telphone","13810169999");
map.put("address","atguigu");
map.put("email","abc@163.com");
jedis.hmset("hash2",map);
List<String> result = jedis.hmget("hash2", "telphone","email");
for (String element : result) {
System.out.println(element);
}
Jedis-API: zset
jedis.zadd("zset01", 100d, "z3");
jedis.zadd("zset01", 90d, "l4");
jedis.zadd("zset01", 80d, "w5");
jedis.zadd("zset01", 70d, "z6");
Set<String> zrange = jedis.zrange("zset01", 0, -1);
for (String e : zrange) {
System.out.println(e);
}
Jedis案例——模拟验证码发送
要求:
1、输入手机号,点击发送后随机生成6位数字码,2分钟有效
随机生成6位数字码:Random
2分钟有效:把验证码放到redis里面,设置过期时间120秒
2、输入验证码,点击验证,返回成功或失败
验证:从redis获取验证码和输入的验证码进行比较
3、每个手机号每天只能输入3次
incr(每次发送之后+1)大于2时候,提交不能发送
package com.zqf.jedis_redsidemo;
import redis.clients.jedis.Jedis;
import java.util.Random;
public class PhoneCode {
public static void main(String[] args) {
//模拟验证码
verifyCode("12345678974");
// getRedisCode("12345678974","983534");
}
//1.生成6位数验证码
public static String getCode(){
Random random = new Random();
String code = "";
for (int i=0;i<6;i++){
int i1 = random.nextInt(10);
code += i1;
}
return code;
}
//2.每个手机每天只能发送三次,验证码放到redis中,设置过期时间
public static void verifyCode(String phone){
//连接redis
Jedis jedis = new Jedis("192.168.2.129",6379);
//拼接key
//手机发送次数key
String countKey = "VerifyCode"+phone+":count";
//验证码key
String codeKey = "VerifyCode"+phone+":code" ;
//每个手机每天只能发送三次
String count = jedis.get(countKey); //从redis中取出发送次数
if (count == null){
//没有发送次数 第一次发送
//设置发送次数是1
jedis.setex(countKey,24*60*60,"1"); //key,过期时间,value
}else if (Integer.parseInt(count)<=2){
//发送次数+1
jedis.incr(countKey);
}else if(Integer.parseInt(count)>2){
System.out.println("24h内发送次数已经超过三次");
jedis.close();
return; //三次之后return 以下代码将不执行
}
//发送验证码到redis
String vcode = getCode();
jedis.setex(codeKey,120,vcode);
jedis.close();
}
//3.验证码校验
public static void getRedisCode(String phone,String code){
//从redis里获取验证码
Jedis jedis = new Jedis("192.168.2.129",6379);
//验证码key
String codeKey = "VerifyCode"+phone+":code" ;
String redisCode = jedis.get(codeKey);
//判断
if (code.equals(redisCode)){
System.out.println("成功");
}else {
System.out.println("失败");
}
}
}
SpringBoot整合Redis
- 1.引入redis相关依赖
<!-- redis -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- spring2.X集成redis所需common-pool2-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.6.0</version>
</dependency>
- 2.application.properties配置redis配置
#Redis服务器地址
spring.redis.host=192.168.xxx.xxx
#Redis服务器连接端口
spring.redis.port=6379
#Redis数据库索引(默认为0)
spring.redis.database= 0
#连接超时时间(毫秒)
spring.redis.timeout=1800000
#连接池最大连接数(使用负值表示没有限制)
spring.redis.lettuce.pool.max-active=20
#最大阻塞等待时间(负数表示没限制)
spring.redis.lettuce.pool.max-wait=-1
#连接池中的最大空闲连接
spring.redis.lettuce.pool.max-idle=5
#连接池中的最小空闲连接
spring.redis.lettuce.pool.min-idle=0
- 3.创建配置类,配置Redis里的相关内容
package com.zqf.jedis_redsidemo.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
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.cache.RedisCacheConfiguration;
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.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.time.Duration;
@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();//Objectmapper是jackson的依赖,目的把对象写成json格式
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
template.setConnectionFactory(factory);
//key序列化方式
template.setKeySerializer(redisSerializer);
//value序列化
template.setValueSerializer(jackson2JsonRedisSerializer);
//value hashmap序列化
template.setHashValueSerializer(jackson2JsonRedisSerializer);
return template;
}
@Bean
public CacheManager cacheManager(RedisConnectionFactory factory) {
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
//解决查询缓存转换异常的问题
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
// 配置序列化(解决乱码的问题),过期时间600秒
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(600))
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
.disableCachingNullValues();
RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
.cacheDefaults(config)
.build();
return cacheManager;
}
}
- 4.RedisTestController中添加测试方法
package com.zqf.jedis_redsidemo.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/redisTest")
public class RedisTestController {
@Autowired
private RedisTemplate redisTemplate;
@GetMapping
public String testRedis() {
//设置值到redis
redisTemplate.opsForValue().set("name","lucy");
//从redis获取值
String name = (String)redisTemplate.opsForValue().get("name");
return name;
}
}
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