Basic use of redis

package redis_learn;

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

import java.util.Iterator;
import java.util.List;
import java.util.Set;

public class JedisDemo {
    
    //@Test Indicates that this method is a unit test method 
    // Connect and add String Type data 
    @Test
    public void fun1() {
    
        // Direct connection redis database 
        Jedis jedis = new Jedis("127.0.0.1",6379);
        // Set the connection password 
// jedis.auth("123");
        // add to String Type data 
        jedis.set("field1","i am field1");
        // Output the added data （ According to the key , Output the corresponding value ）
        System.out.println(jedis.get("field1"));
        // Delete String Type data （ Delete... According to the key ）
// jedis.del("field1");
        // Output data , See if the deletion succeeded 
        System.out.println(jedis.get("field1"));
    }

    // Connect and add hash Type data （ I understand it as giving String Types of data are classified , Every hash Can be stored 2^32-1 Key value pairs ）
    @Test
    public void fun2(){
    
        // Connect through connection pool redis database 
        Jedis jedis = RedisUtils.getJedis();
        // add to hash Type data 
        jedis.hset("hset1","name"," Zhang San ");
        jedis.hset("hset1","age","22");
        jedis.hset("hset1","sex"," male ");
        // get data 
        List<String> hmget = jedis.hmget("hset1", "name","age","sex");
        // Output 
        System.out.println(hmget);
        // Delete 
        jedis.hdel("hset1","name","sex");
        // Delete before exporting , See if the deletion is successful 
        System.out.println(jedis.hmget("hset1", "name","age","sex"));
        RedisUtils.returnResource(jedis);
    }

    // Connect and add List Type data （ queue , Sort by insertion order , You can add an element to the head of the list （ On the left ）, Or tail （ On the right ））
    @Test
    public void fun3() {
    
        // Connect through connection pool redis database 
        Jedis jedis = RedisUtils.getJedis();
        // add to List Type data ,lpush Add to the list header , That is, the data added later is at the top 
        jedis.lpush("field2","aaa");
        jedis.lpush("field2","bbb");
        jedis.lpush("field2","ccc");
        // From the index 1 Get the index from the location of 6 The value of the location , Because it exceeds the actual index 2, So we will continue to cycle output later 
        List<String> field2 = jedis.lrange("field2", 0, 6);
        // Output the added key value pairs 
        for(String item:field2){
    
            System.out.println(item);
        }
        RedisUtils.returnResource(jedis);
    }

    // Connect and add Set Type data （ A combination of non repeating values ）
    @Test
    public void fun4(){
    
        // Connect through connection pool redis database 
        Jedis jedis = RedisUtils.getJedis();
        // add to Set Type data 
        jedis.sadd("name","zhangsan");
        jedis.sadd("name","lisi");
        jedis.sadd("name","lisi");  // Add the same data again , It will cover the last time 
        jedis.sadd("age","16");
        jedis.sadd("sex","nan");
        jedis.sadd("address","china");
        // obtain Set Type data 
        Set<String> name = jedis.smembers("name");
        // Output to get Set Type data （ The order of output is out of order ）
        System.out.println(name);
        System.out.println("\n");
        // Get current redis In the database , all key, With Set Return data in the way of collection 
        Set<String> set = jedis.keys("*");
        Iterator<String> iterator = set.iterator();
        while(iterator.hasNext()){
    
            System.out.println(iterator.next());
        }
        RedisUtils.returnResource(jedis);
    }

    // Connect and add ZSet Type data （zset yes set Upgraded version , It's in set The order attribute is added on the basis of score, This attribute can be specified when adding modification elements , After each assignment ,zset Automatically reorder to the new value ）
    @Test
    public void fun5(){
    
        // Connect through connection pool redis database 
        Jedis jedis = RedisUtils.getJedis();
        // add to zset Type data 
        jedis.zadd("field3",1,"hhh");
        jedis.zadd("field3",0,"jjj");
        jedis.zadd("field3",3,"bbb");
        // obtain set Type data 
        Set<String> field3 = jedis.zrangeByScore("field3", 0, 5);
        // Loop output with iterators 
        Iterator<String> iterator = field3.iterator();
        while(iterator.hasNext()){
    
            System.out.println(iterator.next());
        }
        RedisUtils.returnResource(jedis);
    }
}