guava缓存，取出的是引用
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())); } }
