Spring Boot开启本地缓存（ehcache）

冷不防 2023-01-13 08:59 117阅读 0赞

Redis虽好，但应用场景远没有本地缓存广泛；且效率也远不及本地缓存；

Spring Boot可以通过简单的配置来轻松实现缓存。

上代码！

# 添加依赖 #

**pom.xml**

<spring-boot.verison>2.1.15.RELEASE</spring-boot.verison>
    <ehcache.version>2.10.6</ehcache.version>

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-cache</artifactId>
        <version>${spring-boot.verison}</version>
    </dependency>
    <dependency>
        <groupId>net.sf.ehcache</groupId>
        <artifactId>ehcache</artifactId>
        <version>${ehcache.version}</version>
    </dependency>

# 配置缓存策略 #

注意这个文件的位置。支持自定义，不过建议您就别折腾了！

**src/main/resources/ehcache.xml**

**src/main/resources/application.yml**

spring:
      cache:
        jcache:
          config: classpath:ehcache.xml

# 开启缓存 #

**WebApplication.java**

import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
    import org.springframework.cache.annotation.EnableCaching;
    
    @EnableCaching
    @SpringBootApplication
    public class WebApplication extends SpringBootServletInitializer { 
    
        public static void main(String[] args) { 
            SpringApplication.run(WebApplication.class, args);
        }
    }

# 使用缓存 #

import org.springframework.cache.annotation.Cacheable;
    
    @RestController
    public class ProductController { 
    
        @GetMapping("/get-list")
        @Cacheable(cacheNames = "app-demo", keyGenerator = "localKeyGenerator")
        public Map<String, Object> getList(@ModelAttribute CommonVo commonVo) { 
    
            // TODO: 
    		return new HashMap<String, Object>();
    	}
    }

# 彩蛋：KeyGenerator #

import com.google.common.collect.Lists;
    import lombok.extern.slf4j.Slf4j;
    import org.apache.commons.lang3.StringUtils;
    import org.springframework.cache.interceptor.KeyGenerator;
    import org.springframework.stereotype.Component;
    
    import java.lang.reflect.Method;
    import java.util.stream.Collectors;
    
    @Component
    @Slf4j
    public class LocalKeyGenerator implements KeyGenerator { 
    
        @Override
        public Object generate(Object target, Method method, Object... params) { 
    
            String cString = getName(method);
            String mString = method.getName();
            String pString = Lists.newArrayList(params).stream().map(Object::toString).collect(Collectors.joining("-"));
    
            String result = String.format("%s-%s", cString, mString);
    
            if (StringUtils.isNotBlank(pString)) { 
                result = String.format("%s#%s", result, pString);
            }
    
            log.info("Key: {}", result);
            return result;
        }
    
        private String getName(Method method) { 
    
            String[] pkgs = method.getDeclaringClass().getName().split("\\.");
    
            return pkgs[pkgs.length - 1];
        }
    }

# 亲测有效，欢迎留言！！ #