详解Spring Boot 访问Redis的三种方式

docker pull redis
docker run --name my_redis -d -p 6379:6379 redis
docker exec -it my_redis bash
redis-cli

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Book implements Serializable {
    private Long id;
    private String name;

    private String author;
}

    @Bean
    public RedisTemplate<String, Book> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Book> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    public Optional<Book> findOneBook(String name) {
        HashOperations<String, String, Book> hashOperations = redisTemplate.opsForHash();
        if (redisTemplate.hasKey(CACHE) && hashOperations.hasKey(CACHE, name)) {
            log.info("Get book {} from Redis.", name);
            return Optional.of(hashOperations.get(CACHE, name));
        }

        Optional<Book> book = bookRepository.getBook(name);
        log.info("Book Found: {}", book);
        if (book.isPresent()) {
            log.info("Put book {} to Redis.", name);
            hashOperations.put(CACHE, name, book.get());
            redisTemplate.expire(CACHE, 10, TimeUnit.MINUTES);
        }
        return book;
    }

@Repository
public class BookRepository {
    Map<String, Book> bookMap = new HashMap<>();
    public BookRepository(){
        bookMap.put("apache kafka", Book.builder()
                .name("apache kafka").id(1L).author("zhangsan")
                .build());
        bookMap.put("python", Book.builder()
                .name("Python").id(2L).author("lisi")
                .build());
    }

    public Optional<Book> getBook(String name){
        if(bookMap.containsKey(name)){
            return Optional.of(bookMap.get(name));
        }
        else{
            return Optional.empty();
        }
    }
}

127.0.0.1:6379> keys *
1) "\xac\xed\x00\x05t\x00\x04book"
127.0.0.1:6379> type "\xac\xed\x00\x05t\x00\x04book"
hash
127.0.0.1:6379> hgetall "\xac\xed\x00\x05t\x00\x04book"
1) "\xac\xed\x00\x05t\x00\x06python"
2) "\xac\xed\x00\x05sr\x00&com.ken.redistemplatesample.model.Book=\x19\x96\xfb\x7f\x7f\xda\xbe\x02\x00\x03L\x00\x06authort\x00\x12LJava/lang/String;L\x00\x02idt\x00\x10Ljava/lang/Long;L\x00\x04nameq\x00~\x00\x01xpt\x00\x04lisisr\x00\x0ejava.lang.Long;\x8b\xe4\x90\xcc\x8f#\xdf\x02\x00\x01J\x00\x05valuexr\x00\x10java.lang.Number\x86\xac\x95\x1d\x0b\x94\xe0\x8b\x02\x00\x00xp\x00\x00\x00\x00\x00\x00\x00\x02t\x00\x06python"
3) "\xac\xed\x00\x05t\x00\x0capache kafka"
4) "\xac\xed\x00\x05sr\x00&com.ken.redistemplatesample.model.Book=\x19\x96\xfb\x7f\x7f\xda\xbe\x02\x00\x03L\x00\x06authort\x00\x12Ljava/lang/String;L\x00\x02idt\x00\x10Ljava/lang/Long;L\x00\x04nameq\x00~\x00\x01xpt\x00\bzhangsansr\x00\x0ejava.lang.Long;\x8b\xe4\x90\xcc\x8f#\xdf\x02\x00\x01J\x00\x05valuexr\x00\x10java.lang.Number\x86\xac\x95\x1d\x0b\x94\xe0\x8b\x02\x00\x00xp\x00\x00\x00\x00\x00\x00\x00\x01t\x00\x0capache kafka"

    @Bean
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
    {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
	
    public Optional<String> getBookString(String name){
        HashOperations<String, String, String> hashOperations = stringRedisTemplate.opsForHash();
        if (stringRedisTemplate.hasKey(STRINGCACHE) && hashOperations.hasKey(STRINGCACHE, name)) {
            log.info("Get book {} from Redis.", name);
            return Optional.of(hashOperations.get(STRINGCACHE, name));
        }

        Optional<Book> book = bookRepository.getBook(name);
        log.info("Book Found: {}", book);
        if (book.isPresent()) {
            log.info("Put book {} to Redis.", name);
            hashOperations.put(STRINGCACHE, name, book.get().getAuthor());
            stringRedisTemplate.expire(STRINGCACHE, 10, TimeUnit.MINUTES);
            return Optional.of(book.get().getAuthor());
        }
        return Optional.empty();
    }

127.0.0.1:6379> keys *
1) "string_book"
127.0.0.1:6379> hgetall string_book
1) "python"
2) "lisi"
3) "apache kafka"
4) "zhangsan"

127.0.0.1:6379> keys *
1) "\xac\xed\x00\x05t\x00\x04book"
2) "string_book"
127.0.0.1:6379> memory usage "string_book"
(integer) 104
127.0.0.1:6379> memory usage "\xac\xed\x00\x05t\x00\x04book"
(integer) 712

@RedisHash(value = "cache-book", timeToLive = 600)
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CacheBook implements Serializable {

    @Id
    private Long userId;

    @Indexed
    private String name;

    private String author;
}

public interface CacheBookRepository extends CrudRepository<CacheBook, Long> {
    Optional<CacheBook> findOneByName(String name);
}

@Slf4j
@Service
public class BookService {
    private static final String CACHE = "repository-book";
    @Autowired
    private CacheBookRepository cacheRepository;

    @Autowired
    private BookRepository bookRepository;

    public Optional<CacheBook> findOneBook(String name) {
        Optional<CacheBook> optionalCacheBook = cacheRepository.findOneByName(name);
        if(!optionalCacheBook.isPresent())
        {
            Optional<CacheBook> book = bookRepository.getBook(name);
            log.info("Book Found: {}", book);
            if (book.isPresent()) {
                log.info("Put book {} to Redis.", name);
                cacheRepository.save(book.get());
            }
            return book;
        }
        return optionalCacheBook;
    }
}

127.0.0.1:6379> keys *
1) "repository-book:2"
2) "repository-book:2:idx"
3) "repository-book"
4) "repository-book:name:apache kafka"
5) "repository-book:name:python"
6) "repository-book:1:idx"
7) "repository-book:1"

127.0.0.1:6379> smembers repository-book
1) "1"
2) "2"

127.0.0.1:6379> hgetall repository-book:2
1) "_class"
2) "com.ken.redisrepositorysample.model.CacheBook"
3) "author"
4) "lisi"
5) "name"
6) "python"
7) "userId"
8) "2"

127.0.0.1:6379> smembers repository-book:1:idx
1) "repository-book:name:apache kafka"
127.0.0.1:6379> smembers "repository-book:name:apache kafka"
1) "1"

drop table t_book if exists;
create table t_book (
    id bigint auto_increment,
    create_time timestamp,
    update_time timestamp,
    name varchar(255),
    author varchar(200),
    primary key (id)
);
insert into t_book (name, author, create_time, update_time) values ('python', 'zhangsan', now(), now());
insert into t_book (name, author, create_time, update_time) values ('hadoop', 'lisi', now(), now());
insert into t_book (name, author, create_time, update_time) values ('java', 'wangwu', now(), now());

@Entity
@Table(name = "T_BOOK")
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CacheBook implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    private String author;

    @Column(updatable = false)
    @CreationTimestamp
    private Date createTime;
    @UpdateTimestamp
    private Date updateTime;
}

public interface BookRepository extends JpaRepository<CacheBook, Long> {
}

@Slf4j
@Service
@CacheConfig(cacheNames = "cache-book")
public class BookService {

    @Autowired
    private BookRepository bookRepository;

    @Cacheable
    public List<CacheBook> findAllCoffee() {
        return bookRepository.findAll();
    }

    @CacheEvict
    public void reloadCoffee() {
    }
}

spring.jpa.hibernate.ddl-auto=none
spring.jpa.properties.hibernate.show_sql=true
spring.jpa.properties.hibernate.fORMat_sql=true

management.endpoints.WEB.exposure.include=*

spring.cache.type=redis
spring.cache.cache-names=cache-book
spring.cache.redis.time-to-live=600000
spring.cache.redis.cache-null-values=false

spring.redis.host=localhost

127.0.0.1:6379> keys *
1) "cache-book::SimpleKey []"
127.0.0.1:6379> get "cache-book::SimpleKey []"
"\xac\xed\x00\x05sr\x00\x13java.util.ArrayListx\x81\xd2\x1d\x99\xc7a\x9d\x03\x00\x01I\x00\x04sizexp\x00\x00\x00\x03w\x04\x00\x00\x00\x03sr\x00(com.ken.rediscachesample.model.CacheBook\xec\xcbR=\xe1U\x9b\xf7\x02\x00\x05L\x00\x06authort\x00\x12Ljava/lang/String;L\x00\ncreateTimet\x00\x10Ljava/util/Date;L\x00\x02idt\x00\x10Ljava/lang/Long;L\x00\x04nameq\x00~\x00\x03L\x00\nupdateTimeq\x00~\x00\x04xpt\x00\bzhangsansr\x00\x12java.sql.Timestamp&\x18\xd5\xc8\x01S\xbfe\x02\x00\x01I\x00\x05nanosxr\x00\x0ejava.util.Datehj\x81\x01KYt\x19\x03\x00\x00xpw\b\x00\x00\x01\x84\xff]\x85\xb0x\b-\x81\x80sr\x00\x0ejava.lang.Long;\x8b\xe4\x90\xcc\x8f#\xdf\x02\x00\x01J\x00\x05valuexr\x00\x10java.lang.Number\x86\xac\x95\x1d\x0b\x94\xe0\x8b\x02\x00\x00xp\x00\x00\x00\x00\x00\x00\x00\x01t\x00\x06pythonsq\x00~\x00\bw\b\x00\x00\x01\x84\xff]\x85\xb0x\b-\x81\x80sq\x00~\x00\x02t\x00\x04lisisq\x00~\x00\bw\b\x00\x00\x01\x84\xff]\x85\xb0x\b<\xbf\xd8sq\x00~\x00\x0b\x00\x00\x00\x00\x00\x00\x00\x02t\x00\x06hadoopsq\x00~\x00\bw\b\x00\x00\x01\x84\xff]\x85\xb0x\b<\xbf\xd8sq\x00~\x00\x02t\x00\x06wangwusq\x00~\x00\bw\b\x00\x00\x01\x84\xff]\x85\xb0x\b<\xbf\xd8sq\x00~\x00\x0b\x00\x00\x00\x00\x00\x00\x00\x03t\x00\x04javasq\x00~\x00\bw\b\x00\x00\x01\x84\xff]\x85\xb0x\b<\xbf\xd8x"