在普通项目中操作redis

1.导入maven坐标

 <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.8.0</version>
</dependency>

2.打开redis

如果redis-server闪退，那就先打开redis-cli 输入shutdown再exit就好啦。
3.编写程序

import org.junit.Test;
import redis.clients.jedis.Jedis;

import java.util.Set;

/**
 * 使用Jedis操作Redis
 */
public class JedisTest {

    @Test
    public void testRedis(){
        //1 获取连接
        Jedis jedis = new Jedis("localhost",6379);
        
        //2 执行具体的操作
        jedis.set("username","xiaoming");

        String value = jedis.get("username");
        System.out.println(value);

        //jedis.del("username");

        jedis.hset("myhash","addr","bj");
        String hValue = jedis.hget("myhash", "addr");
        System.out.println(hValue);

        Set<String> keys = jedis.keys("*");
        for (String key : keys) {
            System.out.println(key);
        }

        //3 关闭连接
        jedis.close();
    }
}

在springboot中操作redis

1. 导入坐标

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

2. 编写yml文件

spring:
  application:
    name: springdataredis_demo
  #Redis相关配置
  redis:
    host: localhost
    port: 6379
    #password: 123456
    database: 0 #操作的是0号数据库
    jedis:
      #Redis连接池配置
      pool:
        max-active: 8 #最大连接数
        max-wait: 1ms #连接池最大阻塞等待时间
        max-idle: 4 #连接池中的最大空闲连接
        min-idle: 0 #连接池中的最小空闲连接

3. 编写redis配置类（目的是重写redis对于key的序列化方式）

@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {

        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();

        //默认的Key序列化器为：JdkSerializationRedisSerializer
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());

        redisTemplate.setConnectionFactory(connectionFactory);

        return redisTemplate;
    }

}

4. 编写代码

   引入对象

   @Autowired
       private RedisTemplate redisTemplate;
   

   - 操作String类型数据
   

   public void testString(){
           redisTemplate.opsForValue().set("city123","beijing");
   
           String value = (String) redisTemplate.opsForValue().get("city123");
           System.out.println(value);
   
           redisTemplate.opsForValue().set("key1","value1",10l, TimeUnit.SECONDS);
   
           Boolean aBoolean = redisTemplate.opsForValue().setIfAbsent("city1234", "nanjing");
           System.out.println(aBoolean);
       }
   

   - 操作Hash类型数据
   

   public void testHash(){
           HashOperations hashOperations = redisTemplate.opsForHash();
   
           //存值
           hashOperations.put("002","name","xiaoming");
           hashOperations.put("002","age","20");
           hashOperations.put("002","address","bj");
   
           //取值
           String age = (String) hashOperations.get("002", "age");
           System.out.println(age);
   
           //获得hash结构中的所有字段
           Set keys = hashOperations.keys("002");
           for (Object key : keys) {
               System.out.println(key);
           }
   
           //获得hash结构中的所有值
           List values = hashOperations.values("002");
           for (Object value : values) {
               System.out.println(value);
           }
       }
   
   

   - 操作List类型的数据
   

   public void testList(){
           ListOperations listOperations = redisTemplate.opsForList();
   
           //存值
           listOperations.leftPush("mylist","a");
           listOperations.leftPushAll("mylist","b","c","d");
   
           //取值
           List<String> mylist = listOperations.range("mylist", 0, -1);
           for (String value : mylist) {
               System.out.println(value);
           }
   
           //获得列表长度 llen
           Long size = listOperations.size("mylist");
           int lSize = size.intValue();
           for (int i = 0; i < lSize; i++) {
               //出队列
               String element = (String) listOperations.rightPop("mylist");
               System.out.println(element);
           }
       }
   
     
   

   - 操作Set类型的数据
   

   public void testSet(){
           SetOperations setOperations = redisTemplate.opsForSet();
   
           //存值
           setOperations.add("myset","a","b","c","a");
   
           //取值
           Set<String> myset = setOperations.members("myset");
           for (String o : myset) {
               System.out.println(o);
           }
   
           //删除成员
           setOperations.remove("myset","a","b");
   
           //取值
           myset = setOperations.members("myset");
           for (String o : myset) {
               System.out.println(o);
           }
   
       }
   

   - 操作ZSet类型的数据
   

    public void testZset(){
           ZSetOperations zSetOperations = redisTemplate.opsForZSet();
   
           //存值
           zSetOperations.add("myZset","a",10.0);
           zSetOperations.add("myZset","b",11.0);
           zSetOperations.add("myZset","c",12.0);
           zSetOperations.add("myZset","a",13.0);
   
           //取值
           Set<String> myZset = zSetOperations.range("myZset", 0, -1);
           for (String s : myZset) {
               System.out.println(s);
           }
   
           //修改分数
           zSetOperations.incrementScore("myZset","b",20.0);
   
           //取值
           myZset = zSetOperations.range("myZset", 0, -1);
           for (String s : myZset) {
               System.out.println(s);
           }
   
           //删除成员
           zSetOperations.remove("myZset","a","b");
   
           //取值
           myZset = zSetOperations.range("myZset", 0, -1);
           for (String s : myZset) {
               System.out.println(s);
           }
       }
   
   

   - 通用操作，针对不同的数据类型都可以操作
   

    public void testCommon(){
           //获取Redis中所有的key
           Set<String> keys = redisTemplate.keys("*");
           for (String key : keys) {
               System.out.println(key);
           }
   
           //判断某个key是否存在
           Boolean itcast = redisTemplate.hasKey("itcast");
           System.out.println(itcast);
   
           //删除指定key
           redisTemplate.delete("myZset");
   
           //获取指定key对应的value的数据类型
           DataType dataType = redisTemplate.type("myset");
           System.out.println(dataType.name());
   
       }
   }