检索对象内容

String bucket = "examplebucket-1250000000";
// 对象必须为 JSON 或者 csv 格式的文件
String cosPath = "exampleobject";
final String expression = "Select * from COSObject";

SelectObjectContentRequest selectObjectContentRequest = new SelectObjectContentRequest(
        bucket, cosPath, expression, true,
        new InputSerialization(CompressionType.NONE, new JSONInput(JSONType.DOCUMENT)),
        new OutputSerialization(new JSONOutput(","))
);

// 设置查询结果回调，可能会回调多次
selectObjectContentRequest.setSelectObjectContentProgressListener(new SelectObjectContentListener() {
    @Override
    public void onProcess(SelectObjectContentEvent event) {

    }
});
cosXmlService.selectObjectContentAsync(selectObjectContentRequest,
        new CosXmlResultListener() {
    @Override
    public void onSuccess(CosXmlRequest request, CosXmlResult result) {
        SelectObjectContentResult selectObjectContentResult =
                (SelectObjectContentResult) result;
    }

    // 如果您使用 kotlin 语言来调用，请注意回调方法中的异常是可空的，否则不会回调 onFail 方法，即：
    // clientException 的类型为 CosXmlClientException?，serviceException 的类型为 CosXmlServiceException?
    @Override
    public void onFail(CosXmlRequest cosXmlRequest,
                       @Nullable CosXmlClientException clientException,
                       @Nullable CosXmlServiceException serviceException) {
        if (clientException != null) {
            clientException.printStackTrace();
        } else {
            serviceException.printStackTrace();
        }
    }
});