springboot使用快取cache
阿新 • • 發佈：2018-12-26
springboot使用快取cache
1.引入jar包
<!-- Springboot中開啟快取 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
</dependency>2.在啟動類中開啟快取
@SpringBootApplication @EnableAutoConfiguration @EnableCaching @MapperScan("com.learning.www.mapper") public class LearningApplication { public static void main(String[] args) { SpringApplication.run(LearningApplication.class, args); } }
3.在service的實現中加入快取（重點）
@Override
@Cacheable(value = "ZphInfo", key = "#id")
public ZphInfo getZphInfoById(int id) {
return zphinfomapper.getZphInfoById(id);
}4.編寫controller
@RequestMapping("getZphInfobyid") @ResponseBody public String getZphInfoById(String id) { int zphid = Integer.parseInt(id); ZphInfo zphinfo = zphservice.getZphInfoById(zphid); return "根據查詢到了招聘會資訊："+zphinfo.toString(); }
5.驗證結果
第一次訪問：
————許可權認證———— 2018-11-24 09:33:26.572 DEBUG 6292 --- [nio-8080-exec-3] c.l.w.m.U.getPasswordByUsername : ==> Preparing: select username,password,role from user where username=? 2018-11-24 09:33:26.573 DEBUG 6292 --- [nio-8080-exec-3] c.l.w.m.U.getPasswordByUsername : ==> Parameters: joke (String) 2018-11-24 09:33:26.576 DEBUG 6292 --- [nio-8080-exec-3] c.l.w.m.U.getPasswordByUsername : <== Total: 1 2018-11-24 09:33:40.554 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : URL : http://localhost:8080/zph/getZphInfobyid 2018-11-24 09:33:40.555 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : HTTP_METHOD : GET 2018-11-24 09:33:40.555 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : IP : 0:0:0:0:0:0:0:1 2018-11-24 09:33:40.557 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : CLASS_METHOD : com.learning.www.controller.ZphInfoController.getZphInfoById 2018-11-24 09:33:40.559 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : ARGS : [2] 2018-11-24 09:33:40.620 DEBUG 6292 --- [nio-8080-exec-5] c.l.w.m.ZphInfoMapper.getZphInfoById : ==> Preparing: select * from zphinfo where id = ? 2018-11-24 09:33:40.621 DEBUG 6292 --- [nio-8080-exec-5] c.l.w.m.ZphInfoMapper.getZphInfoById : ==> Parameters: 2(Integer) 2018-11-24 09:33:40.658 DEBUG 6292 --- [nio-8080-exec-5] c.l.w.m.ZphInfoMapper.getZphInfoById : <== Total: 1 2018-11-24 09:33:40.658 INFO 6292 --- [nio-8080-exec-5] c.l.www.controller.LoginController : RESPONSE : 根據查詢到了招聘會資訊：ZphInfo(id=2, title=測試2, time=2019, place=null, add=null)
第二次訪問：沒有sql語句列印，說明未訪問資料庫，而是走了快取。
2018-11-24 09:35:06.512 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : URL : http://localhost:8080/zph/getZphInfobyid
2018-11-24 09:35:06.513 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : HTTP_METHOD : GET
2018-11-24 09:35:06.514 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : IP : 0:0:0:0:0:0:0:1
2018-11-24 09:35:06.515 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : CLASS_METHOD : com.learning.www.controller.ZphInfoController.getZphInfoById
2018-11-24 09:35:06.515 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : ARGS : [2]
2018-11-24 09:35:06.520 INFO 6292 --- [nio-8080-exec-8] c.l.www.controller.LoginController : RESPONSE : 根據查詢到了招聘會資訊：ZphInfo(id=2, title=測試2, time=2019, place=null, add=null)6.切換快取（未實測）
切換為EhCache作為快取
pom中新增一下依賴：
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
</dependency>在resource 資料夾下新建ehcache的配置檔案ehcache.xml 內容如下，此檔案spring boot 會自動掃描
<?xml version="1.0" encoding="UTF-8"?>
<ehcache>
<!--切換為ehcache 快取時使用-->
<cache name="people" maxElementsInMemory="1000" />
</ehcache>切換為Guava作為快取
只需要在pom中新增依賴
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>18.0</version>
</dependency>
問題：
不知道如何將List存入快取中，有大神知道的話，麻煩您給個連結或者下方評論指導一下，感激不盡！！