本篇文章主要介紹了springboot整合spring cache範例程式碼，小編覺得挺不錯的，現在分享給大家，也給大家做個參考。一起跟著小編過來看看吧
本文介紹如何在springboot中使用預設的spring cache，
##聲明式快取
Spring 定義CacheManager和Cache 介面用來統一不同的快取技術。例如 JCache、 EhCache、 Hazelcast、 Guava、 Redis 等。在使用 Spring 整合 Cache 的時候，我們需要註冊實作的 CacheManager 的 Bean。 Spring Boot 為我們自動配置了 JcacheCacheConfiguration、 EhCacheCacheConfiguration、HazelcastCacheConfiguration、GuavaCacheConfiguration、RedisCacheConfiguration、SimpleCacheConfiguration 等。預設使用 ConcurrenMapCacheManager
在我們不使用其他第三方快取依賴的時候，springboot會自動採用ConcurrenMapCacheManager作為快取管理器。環境依賴
在pom檔案引入spring-boot-starter-cache環境依賴：<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency>
public class Book {
private String isbn;
private String title;
public Book(String isbn, String title) {
this.isbn = isbn;
this.title = title;
}
….getter
….setter
}
public interface BookRepository {
Book getByIsbn(String isbn);
}查詢操作，像是操作MySQL、nosql等等。為了示範這個栗子，我只做了線程的延遲操作，當作是查詢資料庫的時間。
實作介面類別：@Component
public class SimpleBookRepository implements BookRepository {
@Override
public Book getByIsbn(String isbn) {
simulateSlowService();
return new Book(isbn, "Some book");
}
// Don't do this at home
private void simulateSlowService() {
try {
long time = 3000L;
Thread.sleep(time);
} catch (InterruptedException e) {
throw new IllegalStateException(e);
}
}
}@Component
public class AppRunner implements CommandLineRunner {
private static final Logger logger = LoggerFactory.getLogger(AppRunner.class);
private final BookRepository bookRepository;
public AppRunner(BookRepository bookRepository) {
this.bookRepository = bookRepository;
}
@Override
public void run(String... args) throws Exception {
logger.info(".... Fetching books");
logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
logger.info("isbn-4567 -->" + bookRepository.getByIsbn("isbn-4567"));
logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
logger.info("isbn-4567 -->" + bookRepository.getByIsbn("isbn-4567"));
logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
}
}2014-06-05 12:15:35.783 … : …. Fetching books
2014-06-05 12:15:40.783 … : isbn-1234 –> >Book{isbn='isbn-1234', title='Some book'}
2014-06-05 12:15:43.784 … : isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}
2014-06-05 12:15:46.786 … : isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}開啟快取技術
在程式的入口中加入@ EnableCaching開啟快取技術：##
@SpringBootApplication
@EnableCaching
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}@Component
public class SimpleBookRepository implements BookRepository {
@Override
@Cacheable("books")
public Book getByIsbn(String isbn) {
simulateSlowService();
return new Book(isbn, "Some book");
}
// Don't do this at home
private void simulateSlowService() {
try {
long time = 3000L;
Thread.sleep(time);
} catch (InterruptedException e) {
throw new IllegalStateException(e);
}
}
}isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}
2017-04-23 18:17:09.479 INFO 8054 — [ main] forezp.AppRunner : isbn-4567 –>Book{isbn='isbn-4567', title='Some book'}
2017-04-23 18:17:09.480 INFO 8054 — [ main] forezp.AppRunner : isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}
2017-04-23 18:17:09.480 INFO 8054 — [ main] forezp.AppRunner : isbn-4567 –>Book{isbn='isbn-4567', title='Some book'}
2017-04-23 18:17:09.481 INFO 8054 — [ main] forezp.AppRunner : isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}
2017-04-23 18:17:09.481 INFO 8054 — [ main] forezp.AppRunner : isbn-1234 –>Book{isbn='isbn-1234', title='Some book'}【相關推薦】
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