java 查看对象内存占用大小

1、POM 依赖

	com.carrotsearch
	java-sizeof
	0.0.5

/2、java 代码通过RamUsageEstimator 查看内存占用大小

        String str = "xxx";
        T object = JSONObject.parseObject(str, T.class);
        byte[] bytes = ProtostuffRuntimeUtil.serialize(object);
        long l = RamUsageEstimator.sizeOf(object);
        long bytesL = RamUsageEstimator.sizeOf(bytes);
        System.out.println("object:" + l + ",bytes:" + bytesL);