直接上代码

import java.util.concurrent.TimeUnit;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

public class GuavaSample {

    private String name = "test";

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public static Cache<String, GuavaSample> getCache() {
        return cache;
    }

    private static final Cache<String, GuavaSample> cache = CacheBuilder.newBuilder()
            .expireAfterWrite(120L, TimeUnit.MINUTES).build();

    public static void main(String[] args) {
        GuavaSample obj1 = new GuavaSample();

        cache.put("obj1", obj1);

        // 方法一，改了实例2的属性，看是否实例1的属性是否变化
        GuavaSample obj1_1 = cache.getIfPresent("obj1");
        GuavaSample obj1_2 = cache.getIfPresent("obj1");
        System.out.println("取出来的是否为同一个对象：" + (obj1_1 == obj1_2));

        // 方法二，改了实例2的属性，看是否实例1的属性是否变化
        obj1_1.setName("aaa");
        obj1_2.setName("bbb");
        System.out.println("取出来的是否为同一个对象：" + "bbb".equals(obj1_1.getName()));
    }
}