Java使用Ehcache缓存框架的技术指南

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency>
   <groupId>net.sf.ehcache</groupId>
   <artifactId>ehcache</artifactId>
</dependency>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">

    <diskStore path="java.io.tmpdir"/>


    <defaultCache
            maxElementsInMemory="10000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            maxElementsOnDisk="10000000"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </defaultCache>

    <!-- My cache strategy. The name attribute value of the custom cache strategy is users. If you define multiple cache strategies, the name values cannot be the same. -->
    <cache name="myCache"
           maxElementsInMemory="10000"
           eternal="false"
           timeToIdleSeconds="120"
           timeToLiveSeconds="120"
           maxElementsOnDisk="10000000"
           diskExpiryThreadIntervalSeconds="120"
           memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </cache>

</ehcache>

spring.cache.type=ehcache
spring.cache.ehcache.config=classpath:ehcache.xml

@SpringBootApplication
@EnableCaching
public class ShopEurekaApplication {
    public static void main(String[] args) {
        SpringApplication.run(ShopEurekaApplication.class, args);
    }
}

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Cacheable(value = "myCache", key = "#id")
    public String getUserById(String id) {
        System.out.println("查询数据库...");
        return "User-" + id;
    }
}

import com.lm.shop.shopeureka.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/getUserById")
    public String getUserById(@RequestParam String id) {
        String userId  = userService.getUserById(id);
        return "Order created with ID: " + userId;
    }
}