使用绝对或相对路径在 curl 请求中发送 json 文件

Just wondering how I can send a curl command with the -d option specifying a file with its path and not a file in the current directory.

This is what I'm getting when I try to test my app with the json file in the local dir. Both the app and myself are happy:

curl -XPOST -H 'Content-Type:application/json' -d @all_fields.json http://testcomp.lab.net:8080/stats -v -s
* About to connect() to testcomp.lab.net port 8080
*   Trying 10.93.2.197... connected
* Connected to testcomp.lab.net (10.93.2.197) port 8080
> POST /stats HTTP/1.1
> User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
> Host: testcomp.lab.net:8080
> Accept: */*
> Content-Type:application/json
> Content-Length: 2882
> Expect: 100-continue
> 
< HTTP/1.1 100 Continue
HTTP/1.1 200 OK
< Content-Length: 0
* Connection #0 to host testcomp.lab.net left intact
* Closing connection #0

这就是我在另一个目录中指定json文件时得到的结果

curl -XPOST -H 'Content-Type:application/json' -d @json/all_fields.json http://testcomp.lab.net:8080/stats -v -s
"Invalid json for Java type interface java.util.List"
Warning: Couldn't read data from file "json/all_fields.json", this makes an 
Warning: empty POST.

<snip snip>
<snip snip>

< HTTP/1.1 400 Bad Request
< Content-Type: application/json
< Transfer-Encoding: chunked
* Connection #0 to host testcomp.lab.net left intact
* Closing connection #0

在curl的手册页中，我没有看到为作为数据传入的文件指定目录的任何内容.不幸的是，我只限于本地目录中的文件，还是有特殊的方法来指定不同目录中的文件？提前感谢你的帮助.