springboot 缓存技术之 ehcache

1、pom文件引入ehcache

<!-- Spring Boot 缓存支持启动器 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<!-- Ehcache 坐标 -->
<dependency>
    <groupId>net.sf.ehcache</groupId>
    <artifactId>ehcache</artifactId>
</dependency>

2、复制jar包中ehcache-failsafe.xml 文件放在src/main/resources下。名字随意起

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">


    <diskStore path="java.io.tmpdir"/>
　　<!--默认配置 -->
    <defaultCache
            maxElementsInMemory="10000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            maxElementsOnDisk="10000000"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </defaultCache>

　　<!--自定义配置 name唯一标识 具体属性有兴趣的可自查，就不详细说明了 -->

    <cache name="student"
            maxElementsInMemory="10000" 
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            maxElementsOnDisk="10000000"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </cache>
</ehcache>
并在 application.properties 中配置路径

spring.cache.ehcache.config=classpath:ehcache.xml
3、目录结构

4、使用

//启动器

package com.zjx;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;

@SpringBootApplication
//配置应用是否要缓存
@EnableCaching
public class SpringbootehcacheApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootehcacheApplication.class, args);
    }

}
//service

package com.zjx.service;

import com.zjx.mapper.StudentMapper;
import com.zjx.pojo.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class StudentService  {
    @Autowired
    StudentMapper studentMapper;
　　//@CacheEvict 清除指定value中的缓存 。 必须指定要清除的对象。否则不起作用 一般在新增 删除 更新用
  @CacheEvict(value="student",allEntries = true)
  public void add(Student student){

      this.studentMapper.add(student);
  }

    public List<Student> findByName(Student student){

       return  this.studentMapper.findByName(student);
    }

    @CacheEvict(value="student",allEntries = true)
    public void del(Student student){

        this.studentMapper.delete(student);
    }
　　//@Cacheable （value）指定使用默认缓存配置或自定义配置。
    @Cacheable(value = "student")
    public List<Student> allStudent(){

        return  this.studentMapper.findAll();
    }


}
5、测试用例

package com.zjx;

import com.zjx.pojo.Student;
import com.zjx.service.StudentService;
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.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootehcacheApplicationTests {

    @Autowired
    StudentService studentService;
    @Test
    public void contextLoads() {
    }

    @Test
    public void getStudent(){
        //第一次
        System.out.println(this.studentService.allStudent().size());

        this.studentService.add(new Student("aa","24","男","华阳大道"));
        this.studentService.del(new Student("cc","","",""));
        this.studentService.del(new Student("bb","","",""));
        this.studentService.del(new Student("aa","","",""));

        //第二次
        System.out.println(this.studentService.allStudent().size());
    }

}

以上是自学总结。有借鉴前辈帖子望见谅。不足之处请多多指教

springboot 缓存技术之 ehcache

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