Spring Boot整合EhCache的步骤详解

<?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>
 <groupId>com.yiidian</groupId>
 <artifactId>ch03_10_springboot_ehcache</artifactId>
 <version>1.0-SNAPSHOT</version>
 <!-- 导入springboot父工程. 注意：任何的SpringBoot工程都必须有的！！！ -->
 <!-- 父工程的作用：锁定起步的依赖的版本号，并没有真正到依赖 -->
 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.1.11.RELEASE</version>
 </parent>
 <dependencies>
  <!--web起步依赖-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <!--springboot 集成 junit 起步依赖-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <version>2.1.6.RELEASE</version>
   <scope>test</scope>
  </dependency>
  <!-- 缓存坐标 -->
  <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-cache -->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-cache</artifactId>
   <version>2.1.11.RELEASE</version>
  </dependency>
  <!-- Ehcache支持 -->
  <dependency>
   <groupId>net.sf.ehcache</groupId>
   <artifactId>ehcache</artifactId>
   <version>2.10.6</version>
  </dependency>

 </dependencies>
</project>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">
 <diskStore path="java.io.tmpdir"/>
 <!-- defaultCache： 默认配置 -->
 <defaultCache
   maxElementsInMemory="10000"
   eternal="false"
   timeToIdleSeconds="120"
   timeToLiveSeconds="120"
   maxElementsOnDisk="10000000"
   diskExpiryThreadIntervalSeconds="120"
   memoryStoreEvictionPolicy="LRU">
  <persistence strategy="localTempSwap"/>
 </defaultCache>
 <!-- 缓存名称为customer的配置 -->
 <cache name="customer"
   maxElementsInMemory="10000"
   eternal="false"
   timeToIdleSeconds="120"
   timeToLiveSeconds="120"
   maxElementsOnDisk="10000000"
   diskExpiryThreadIntervalSeconds="120"
   memoryStoreEvictionPolicy="LRU">
  <persistence strategy="localTempSwap"/>
 </cache>
</ehcache>

#配置EhCache的配置
spring:
 cache:
 ehcache:
  config: ehcache.xml # 读取ehcache.xml配置

package com.yiidian;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
/**
 * Spring Boot引导类
 * 一点教程网 - www.yiidian.com
 */
@SpringBootApplication
@EnableCaching // 开启缓存
public class MyBootApplication {
 public static void main(String[] args) {
  SpringApplication.run(MyBootApplication.class,args);
 }
}

package com.yiidian.service;
import com.yiidian.domain.Customer;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
/**
 * 业务层
 *一点教程网 - www.yiidian.com
 */
@Service
public class CustomerService {
  @Cacheable(value = "customer",key = "#id")
  public Customer findById(Integer id){
    System.out.println("执行了UserService获取User");
    Customer customer = new Customer();
    customer.setId(1);
    customer.setName("小明");
    customer.setGender("男");
    customer.setTelephone("13244445555");
    return customer;
  }
}

package com.yiidian.test;

import com.yiidian.MyBootApplication;
import com.yiidian.service.CustomerService;
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.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * SpringBoot整合EhCache
 * 一点教程网 - www.yiidian.com
 */
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = MyBootApplication.class)
public class EhCacheDemo {
  @Autowired
  private CustomerService customerService;

  @Test
  public void test1(){
    //查询第一次
    System.out.println(customerService.findById(1));
    //查询第二次
    System.out.println(customerService.findById(1));
  }
}

@Cacheable(value = "customer" ,key = "targetClass + methodName +#p0")
public List<Customer> queryAll(Customer cust) {
  return customerDao.findAllByUid(cust);
}

@CacheConfig(cacheNames = {"myCache"})
public class UserServiceImpl implements UserService {
  @Override
  @Cacheable(key = "targetClass + methodName +#p0")//此处没写value
  public List<BotRelation> findUsers(int num) {
    return userDao.findUsers(num);
  }
  .....
}

@CachePut(value = "customer", key = "targetClass + #p0")
public Customer updata(Customer cust) {
  Customer customer = customerDao.findAllById(cust.getId());
  customer.updata(cust);
  return customer ;
}

@Cacheable(value = "customer", key = "targetClass +#p0")//清空缓存
public Customer save(Customer cust) {
  customerDao.save(cust);
  return cust;
}

@Cacheable(value = "customer",key = "#p0.id")
public Customer save(Customer cust) {
  customerDao.save(cust);
  return job;
}

//清除一条缓存，key为要清空的数据
@CacheEvict(value="customer",key="#id")
public void delect(int id) {
  customerDao.deleteAllById(id);
}

//方法调用后清空所有缓存
@CacheEvict(value="customerCache",allEntries=true)
public void delectAll() {
  customerDao.deleteAll();
}

//方法调用前清空所有缓存
@CacheEvict(value="customerCache",beforeInvocation=true)
public void delectAll() {
  customerDao.deleteAll();
}