oss中的图片处理问题

我有一个bucket，一个图片title1.png,地址是： http://dx-img-storage.oss-cn-hangzhou.aliyuncs.com/title1.png

怎么样可以 http://dx-img-storage.oss-cn-hangzhou.aliyuncs.com/title1.png@100h获取缩略图。真心不会用啊。

并且的图片链接在浏览器地址打开时会自动下载，而非在浏览器中显示，这个是什么原因？

使用如下代码上传图片。
String accessKey = "**********";
        String secretKey = "*********";
        String ossEndpoint = "http://oss-cn-hangzhou.aliyuncs.com/";
        String bucket = "dx-img-storage";
        OSSClient client = new OSSClient(ossEndpoint, accessKey, secretKey);

        FileInputStream in = new FileInputStream(new File("C:\\Users\\xiangqian\\Desktop\\桌面备份\\20150909\\title.png"));
        ObjectMetadata objectMeta = new ObjectMetadata();
        objectMeta.setContentType("image/jpeg");
        client.putObject(bucket, "title1.png", in, objectMeta);


查了一下网上说用getObject方法，client.getObject(bucket, "title1.png@!w100_h200.jpg");但是会报错。
[ErrorCode]: NoSuchKey
[RequestId]: 5624DF26D5A340AE3B128D7A
[HostId]: dx-img-storage.oss-cn-hangzhou.aliyuncs.com