Spring boot默認使用的是SimpleCacheConfiguration，即使用ConcurrentMapCacheManager來實現緩存。但是要切換到其他緩存實現也很簡單
pom文件
在pom中引入相應的jar包
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<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> </dependency></dependencies> |
配置文件
EhCache所需要的配置文件，只需要放到類路徑下，Spring Boot會自動掃描。
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<?xml version="1.0" encoding="UTF-8"?><ehcache> <cache name="people" maxElementsInMemory="1000"/></ehcache> |
也可以通過在application.properties文件中，通過配置來指定EhCache配置文件的位置，如：
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spring.cache.ehcache.config= # ehcache配置文件地址 |
Spring Boot會自動為我們配置EhCacheCacheMannager的Bean。
關鍵Service
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package com.xiaolyuh.service.impl;import com.xiaolyuh.entity.Person;import com.xiaolyuh.repository.PersonRepository;import com.xiaolyuh.service.PersonService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cache.annotation.CacheEvict;import org.springframework.cache.annotation.CachePut;import org.springframework.cache.annotation.Cacheable;import org.springframework.stereotype.Service;@Servicepublic class PersonServiceImpl implements PersonService { @Autowired PersonRepository personRepository; @Override @CachePut(value = "people", key = "#person.id") public Person save(Person person) { Person p = personRepository.save(person); System.out.println("為id、key為:" + p.getId() + "數據做了緩存"); return p; } @Override @CacheEvict(value = "people")//2 public void remove(Long id) { System.out.println("刪除了id、key為" + id + "的數據緩存"); //這里不做實際刪除操作 } @Override @Cacheable(value = "people", key = "#person.id")//3 public Person findOne(Person person) { Person p = personRepository.findOne(person.getId()); System.out.println("為id、key為:" + p.getId() + "數據做了緩存"); return p; }} |
Controller
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package com.xiaolyuh.controller;import com.xiaolyuh.entity.Person;import com.xiaolyuh.service.PersonService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cache.CacheManager;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class CacheController { @Autowired PersonService personService; @Autowired CacheManager cacheManager; @RequestMapping("/put") public long put(@RequestBody Person person) { Person p = personService.save(person); return p.getId(); } @RequestMapping("/able") public Person cacheable(Person person) { System.out.println(cacheManager.toString()); return personService.findOne(person); } @RequestMapping("/evit") public String evit(Long id) { personService.remove(id); return "ok"; }} |
啟動類
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@SpringBootApplication@EnableCaching// 開啟緩存，需要顯示的指定public class SpringBootStudentCacheApplication { public static void main(String[] args) { SpringApplication.run(SpringBootStudentCacheApplication.class, args); }} |
測試類
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package com.xiaolyuh;import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;import java.util.HashMap;import java.util.Map;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.http.MediaType;import org.springframework.test.context.junit4.SpringRunner;import org.springframework.test.web.servlet.MockMvc;import org.springframework.test.web.servlet.MvcResult;import org.springframework.test.web.servlet.setup.MockMvcBuilders;import org.springframework.web.context.WebApplicationContext;import net.minidev.json.JSONObject;@RunWith(SpringRunner.class)@SpringBootTestpublic class SpringBootStudentCacheApplicationTests { @Test public void contextLoads() { } private MockMvc mockMvc; // 模擬MVC對象，通過MockMvcBuilders.webAppContextSetup(this.wac).build()初始化。 @Autowired private WebApplicationContext wac; // 注入WebApplicationContext // @Autowired // private MockHttpSession session;// 注入模擬的http session // // @Autowired // private MockHttpServletRequest request;// 注入模擬的http request\ @Before // 在測試開始前初始化工作 public void setup() { this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build(); } @Test public void testAble() throws Exception { for (int i = 0; i < 2; i++) { MvcResult result = mockMvc.perform(post("/able").param("id", "2")) .andExpect(status().isOk())// 模擬向testRest發送get請求 .andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8))// 預期返回值的媒體類型text/plain; // charset=UTF-8 .andReturn();// 返回執行請求的結果 System.out.println(result.getResponse().getContentAsString()); } }} |
打印日志
從上面可以看出第一次走的是數據庫，第二次走的是緩存
源碼：https://github.com/wyh-spring-ecosystem-student/spring-boot-student/tree/releases
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://www.jianshu.com/p/31e666f1ff57
