Springboot使用cache缓存过程代码实例

1.pom.xml

  net.sf.ehcache
  ehcache

2.ehcache.xml

diskStore是物理文件的存储路径，

cache标签中的name是多cache时区分的唯一标识， 和程序中初始化方法getCache("***")参数一致。
缓存参数和本地数据持久化存储需自行配置

3.application.yml

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

4.启动类添加

@EnableCaching

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
 
@EnableCaching
@SpringBootApplication
public class DemoApplication {
 
  public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
  }
 
}

5.springcloud 中使用cache

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Component;
 
import java.io.IOException;
 
 

@Component
public class CacheService {
 
  @Autowired
  private CacheManager cacheManager;
  
  public String getCache() throws IOException {
   String res = "";
 
    Cache cache = cacheManager.getCache("usercache");
    if(cache != null){
      Element element = cache.get("name");
      if(element != null){
 Object objectValue = element.getObjectValue();
 res = (String) objectValue;
      }
    }
    return res;
  }
 
  
  public void putCache(String data) throws IOException {
    //若cacheManager被关闭，则重新创建
    if(cacheManager == null || cacheManager.getStatus().intValue() != 1){
      cacheManager = new CacheManager(new ClassPathResource("ehcache.xml").getInputStream());
    }
    Cache cache = cacheManager.getCache("usercache");
    //处理成要缓存的数据
 
    //存入缓存（注意：需要保证存入缓存的数据都是可序列化的）
    cache.put(new Element("name", data));
    
    //将所有缓存项从内存刷新到磁盘存储，并从DiskStore刷新到磁盘。
//    cache.flush();
    //更新.index文件
//    cacheManager.shutdown();
  }
}

6.controller层

import java.io.IOException;
 
@RestController
public class AppController{
 
 
  @Autowired
  private CacheService cacheService;
 
  @RequestMapping("/setName")
  public String setName() {
 
    try {
      cacheService.putCache( "heshan");
    } catch (IOException e) {
      e.printStackTrace();
    }
    return "yes";
  }
  @RequestMapping("/getName")
  public String getName() {
 
    String res = null;
    try {
      res = cacheService.getCache( );
    } catch (IOException e) {
      e.printStackTrace();
    }
    return res;
  }
}

结果：

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