Introduction to redis

springboot Integrate redis

1. Import corresponding dependencies

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
        </dependency>

2.springboot Medium application.properties File corresponding configuration

#Redis Server address 
spring.redis.host= Yours redis Of ip Address 
#Redis Server connection port 
spring.redis.port= Yours redis port 
#Redis Database index （ The default is 0）
spring.redis.database= 0
# Connection timeout （ millisecond ）
spring.redis.timeout=1800000
# Maximum number of connections in connection pool （ Use a negative value to indicate that there is no limit ）
spring.redis.lettuce.pool.max-active=20
# Maximum blocking waiting time ( A negative number means no limit )
spring.redis.lettuce.pool.max-wait=-1
# The maximum free connection in the connection pool 
spring.redis.lettuce.pool.max-idle=5
# The smallest free connection in the connection pool 
spring.redis.lettuce.pool.min-idle=0
spring.redis.password= Yours redis password 

The corresponding order , Detailed commands can be searched and operated by yourself

3. stay springboot Experiment in the test class

@SpringBootTest
public class redistest {
    @Autowired
    private RedisTemplate<String,String> redisTemplate;
    @Test
    public void test1(){
        redisTemplate.opsForValue().set("1","1");
    }
}

Test success

SpringDataRedis serialize

 redis You can take whatever you want Object Write... As a value redis, But it will Object The sequence is converted to byte form , By default JDK serialize , The results are as follows

  Poor readability , Memory usage is also very large , It's very painful

Convert it to JSON String can solve this problem perfectly

have access to fastjson package , take Object Objects of type are directly converted to json character string , Import the following dependencies

      <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>

take Object Object conversion to json character string JSON.toJSONString(Object) 

 redisTemplate.opsForValue().set("TOKEN_"+token, JSON.toJSONString(sysUsers),1, TimeUnit.DAYS);

take json The string is inversely converted to the original object

 SysUsers sysUsers=JSON.parseObject(userJson,SysUsers.class);

To complete redis Serialization and deserialization , Awesome