public static void main(String[] args) {
        Cache cache = new Cache("cache1", 2, true, true, 120, 120, false, 120);
        CacheManager cacheManager = new CacheManager();
        cacheManager.addCache(cache);
        
        String key = "key1";
        Element element = new Element(key,"key1");
        cache.put(element);
        if(cache.get(key)!=null){
        System.out.println("儲存key為字串,取值key值為儲存key="+cache.get(key).getValue().toString());}
        else{
            System.out.println("儲存key為字串,取值key值為儲存key,取不到快取資訊");
        }

        String key2 = new String("key2");
        Element element2 = new Element(key2, "key2");
        cache.put(element2);
        if (cache.get(key2) != null) {
            System.out.println("儲存key為字串物件,取值key值為儲存key=" + cache.get(key2).getValue().toString());
        } else {
            System.out.println("儲存key為字串物件,取值key值為儲存key,取不到快取資訊");
        }
        if (cache.get("key2") != null) {

            System.out.println("儲存key為字串物件,取值key值為字串=" + cache.get("key2").getValue().toString());

           System.out.println("儲存key為字串物件,取值key值為字串=" + (key2=="key2"));
        } else {
            System.out.println("儲存key為字串物件,取值key值為字串,取不到快取資訊");
        }

        StringBuilder key3 = new StringBuilder("key3");
        key3.append(1);
        Element element3 = new Element(key3, "key3");
        cache.put(element3);
        if (cache.get(key3) != null) {
            System.out.println("儲存key為StringBuilder物件,取值key為儲存key=" + cache.get(key3).getValue().toString());
        } else {
            System.out.println("儲存key為StringBuilder物件,取值key為儲存key,取不到快取資訊");
        }
        if (cache.get("key3") != null) {
            System.out.println("儲存key為StringBuilder物件,取值key為字串=" + cache.get("key3").getValue().toString());
        } else {
            System.out.println("儲存key為StringBuilder物件,取值key為字串,取不到快取資訊");
        }

        StringBuilder key4 = new StringBuilder("key4");
        key4.append(1);
        Element element4 = new Element(key4.toString(), "key4");
        cache.put(element4);
        if (cache.get("key41") != null) {
            System.out.println("儲存key為StringBuilder物件.toString,取值key為字串=" + cache.get("key41").getValue().toString());
        } else {
            System.out.println("儲存key為StringBuilder物件.toString,取值key為字串,取不到快取資訊");
        }
        if (cache.get(key4) != null) {
            System.out.println("儲存key為StringBuilder物件.toString,取值key為StringBuilder物件=" + cache.get(key4).getValue().toString());
        } else {
            System.out.println("儲存key為StringBuilder物件.toString,取值key為StringBuilder物件,取不到快取資訊");
        }
      

    }
 

執行結果:

儲存key為字串,取值key值為儲存key=key1
儲存key為字串物件,取值key值為儲存key=key2
儲存key為字串物件,取值key值為字串=key2
儲存key為字串物件,取值key值為字串=false
儲存key為StringBuilder物件,取值key為儲存key=key3
儲存key為StringBuilder物件,取值key為字串,取不到快取資訊
儲存key為StringBuilder物件.toString,取值key為字串=key4
儲存key為StringBuilder物件.toString,取值key為StringBuilder物件,取不到快取資訊

總結:ehcache 根據key值獲取快取物件是,傳入的引數為Object,Serializable 型別,是通過equals方法來比較key值相同時取快取資料