EHCACHE Spring Annotations Core framework technical principles in the Java class library

EHCACHE Spring Annotions Core is a framework that integrates EHCACHE and Spring annotations in the Java library.It can greatly simplify the process of using the EHCACHE cache and easily integrate with the Spring framework. EHCACHE is a widely used Java cache framework that can store data in memory and provide fast reading and writing access.The Spring framework is a framework for developing enterprise -level Java applications, which provides a variety of functions and characteristics. One of them is seamless integration with EHCACHE. The core principle of the EHCACACHE Spring Annotations Core is based on Spring annotations to achieve cache configuration and use.It provides a variety of annotations, including `@cacheable`,@cachePut`,@cacheevict`, etc. It is used to mark the way to label the cache operation.Through these annotations, we can flexibly control which methods need to be cached and cache behavior, such as cache naming, cache expiration time, etc. Below is a simple example code, showing how to use EHCACHE Spring Annotations Core for caching operations: First of all, we need to add the following dependencies to the `POM.XML` file to introduce EHCACHE and Spring -related libraries: <dependencies> <!-- Ehcache --> <dependency> <groupId>org.ehcache</groupId> <artifactId>ehcache</artifactId> <version>3.8.1</version> </dependency> <!-- Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.3.9</version> </dependency> <!-- Ehcache Spring Annotations Core --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> <version>2.5.5</version> </dependency> </dependencies> Next, we need to make some configurations in the configuration file of Spring.Suppose we have a service class called `Userservice`, and the` GetuserByid` method is used to obtain user information based on user ID.We hope that the result of this method can be cached. First of all, we need to enable the cache function in the configuration file of Spring and configure EHCACHE as the cache provider: <!-- Enable caching support --> <cache:annotation-driven cache-manager="cacheManager" /> <!-- Ehcache configuration --> <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"> <property name="cacheManager"> <bean class="org.ehcache.jsr107.EhcacheCachingProvider" factory-method="getDefaultCachingProvider" /> </property> </bean> <!-- UserService bean --> <bean id="userService" class="com.example.UserService" /> Then, add the corresponding annotation to the method of the `userService` class: public class UserService { @Cacheable(cacheNames = "users", key = "#id") public User getUserById(int id) { // Get user information logic from database or other data sources } // Other methods... } In the above examples, the annotation of `@cacheable` is used for labeling` getuserByid` method, `cachenames` specifies the cache name" users ", and` key` specifies the parameters of the key value of the cache `ID`.When the `GetUserbyid` method is called, if there is already the result of the corresponding key value in the cache, it will be obtained directly from the cache without the logic of the method, which will increase the speed of the query.If there is no existence in the cache, the logic of the method will be executed and the result is stored into the cache. In addition to `@cacheable` annotations, EHCACHE SPRING AnNotations Core also provides other annotations, such as`@cacheput` used to update the data in the cache, `@cacheevict` is used to clear the cache, and so on.By using these annotations reasonably, we can build an efficient and easy -to -maintain cache system. In summary, EHCACHE Spring Annotations Core is a cache framework based on Spring annotation. With the powerful features of EHCACHE and Spring, it can easily achieve cache configuration and use.By using annotations, we can control the cache behavior more flexibly and improve the performance and maintainability of the application.