springboot integrated springcache

Today, I try to do a bit springboot integrated springcache cache, springcache is based on the annotation (comment) is a caching technology

Features are summarized as follows:

By a small amount of configuration annotation comments to make existing code caching support
Out of the box support for Out-Of-The-Box, that is, without installation and deployment of additional third-party components can use the cache
Support Spring Express Language, any property or method can be used to define the object cache key and condition
Support for AspectJ, and through its implementing any method of caching support
Support for custom and custom cache key managers have considerable flexibility and scalability

Also very simple to use

The first step: add maven dependent

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>

Step Two: Create a new class TestTime

import java.util.Date;

public class TestTime {
    private Date time;
    public TestTime(Date time){
        this.time=time;
    }

    public Date getTime() {
        return time;
    }

    public void setTime(Date time) {
        this.time = time;
    }

    @Override
    public String toString() {
        return "{ 时间='" + time + '\'' + '}';
    }
}

The third step is to add a TestTime Interface

import hello.entity.TestTime;

public interface TestTimeService {
    TestTime getTestTime();
}

The fourth step, the main function is added:

@EnableCaching 

open the cache, this is very important

The fifth step, to implement the interface:

import hello.Service.TestTimeService;
import hello.entity.TestTime;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class TestTimeController implements TestTimeService {
    

    @Override
    @Cacheable(value = "time")
    public TestTime getTestTime(){
        return new TestTime(new Date());
    }

}

Use @Cachable you can use caching, very simple.

About introduction carefully annotated cache can refer to the article: https://www.cnblogs.com/fashflying/p/6908028.html

The sixth step, create a test class TestRun:

import hello.Service.TestTimeService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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 TestRun {

    private static final Logger log = LoggerFactory.getLogger(TestRun.class);

    @Autowired
    TestTimeService testTimeService;

    @Test
    public void getTime() throws InterruptedException {
        int i = 1;
        while (i <= 20) {
            log.info("" + "第" + i + "次获取时间" + testTimeService.getTestTime());
            i++;
            Thread.sleep(1000);
        }
    }


}

Directory created as follows:

Finally: Run getTime test methods:

It can be seen 20 times to call gettesttime, not the latest acquisition time, but time in the cache.

This article Source: https://gitee.com/Hiro-D/Java/tree/master/Spring-cache

直接使用springcahce是无法设置缓存有效时间的，是要使用ehcache或者redis 或者guava设置，下篇讲一下springcahce设置过期时间。

springboot integrated springcache

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