Interpretation of the technical principles of the Spring Cache framework in the Java class library

Spring Cache is a powerful cache framework that can provide a simple and flexible cache solution in the Java library.This article will interpret the technical principles of the Spring Cache framework in detail and provide some Java code examples. 1. Spring Cache Framework Overview Spring Cache is part of the Spring framework, which provides a transparent cache support for the application.The framework is decoupled by the cache logic and business logic, so that developers can easily add cache to their applications.Spring Cache uses annotations to mark methods or classes, indicating that the results of these methods can be cached and provided the implementation of multiple cache managers. 2. The core concept of Spring Cache 2.1 cache manager (cacheManager) The cache manager is one of the core components of Spring Cache, which is responsible for managing the creation, configuration and maintenance of the cache.Spring provides several cache managers, including ConcurrentMapCacheManager, EHCACHECACACHEMANAGER and RedisCacheManager.Developers can choose suitable cache managers according to specific needs. 2.2 cache annotation Spring Cache uses annotation configuration to declare which methods should be cached.Developers can use @cacheable, @cachePut, and @cacheevict to achieve cache functions on methods. -@Cacheable: The result of the marking method can be cached. When the method is called, if the result of returning in the cache, the value in the cache is directly returned, otherwise the execution method will be added to the cache. -@Cachepp: The results of the marking method should be added to the cache. Each call method will execute the method body and add the return result to the cache. -@Cacheevict: Remove the corresponding items in the cache after the labeling method is executed. You can specify the removal of a single cache item or clear the entire cache. 2.3 cache key generator (keygenrator) The cache key generator is used to generate the key to generate cache items.If there is no specified key value on the annotation, use the cache key to generate the default key.Spring Cache provides the default cache key generator, which can also be customized. 3. Spring Cache workflow When the Spring Cache annotation is used, the Spring framework will check the cache before the method executes. If there is a corresponding value in the cache, the result of the cache directly returns the cache.If there is no result in the cache, the method is executed and the result is caught for the next use. Below is a sample code using Spring Cache: @Service public class ProductService { @Cacheable("products") public List<Product> getAllProducts() { // Obtain data from the database or other data sources List<Product> products = productDao.getAllProducts(); return products; } @CachePut(value = "products", key = "#product.id") public void addProduct(Product product) { // Add the product to the database or other data sources productDao.addProduct(product); } @CacheEvict(value = "products", key = "#productId") public void deleteProduct(int productId) { // Delete the product from the database or other data sources productDao.deleteProduct(productId); } } In the above examples, the getallproducts () method uses the @cacheable annotation to cache the result. The addproduct () method uses @cachepput annotation to add the newly added product to the cache. The deleteproduct () method uses @Cacheevict to clear the specified product cache. 4 Conclusion Spring Cache provides a simple and flexible cache solution that can help developers easily add cache to their applications.By using the cache manager, cache annotation, and custom cache key generator, developers can better control and optimize the performance of the application. It is hoped that through the interpretation of this article, readers can understand and master the technical principles of the Spring Cache framework, and be able to use it flexibly in actual projects.