1.创建一个demo项目

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.5.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

2.配置DemoApplication文件

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

3.编写DemoController

@RestControllerpublic class DemoController {@Autowiredprivate DemoService demoService;@GetMapping("demo")public boolean demo(@RequestParam("id") Integer id){return demoService.demo(id);}}

4.编写DemoService

package com.example.demo;import org.springframework.cache.annotation.Cacheable;import org.springframework.stereotype.Service;@Servicepublic class DemoService {/** * 当id大于10时使用缓存 * 当id小于或等于10时不使用缓存 * @param id * @return */@Cacheable(value = "id",key = "#id",condition = "#id>10")public boolean demo(Integer id){System.out.println("---->未使用缓存");if(id==20){ return true;}else{return false;}}}

5.配置服务端口

server.port=1111

6.测试

http://127.0.0.1:1111/demo?id=10

7.spring-boot使用tools-redis实现分布式缓存