文件上传通过Java的lib Apache的百科全书简明的例子 [英] Concise example of file upload via Java lib Apache Commons

问题描述

我已经打消了我费解，严重畸形的问题，以便它不从非常工整，正确答案下方减损。由于找到一个在线的例子做这个令人难以置信的共同任务（令人惊讶的）困难，我希望得到号Yoni数多了起来，蜱他的回应。

[edit] I've removed my convoluted and badly malformed question so that it doesn't detract from the very neat and correct answer beneath. Given the (surprising) difficulty of finding an on-line example for doing this incredibly common task, I hope Yoni gets a few more up-ticks for his response.

所以......一言以蔽之的问题...

So... the question in a nutshell...

如何使用Apache.Commons将文件上传到某个目的地。我用它在Android和上传到PHP脚本，但很明显，它可以从任何Java程序以及任何基于HTTP的监听工作。

How do I use Apache.Commons to upload a file to some destination. I'm using it in Android and uploading to a PHP script, but obviously it can work from any Java program and to any HTTP based listener.

推荐答案

从 MultipartRequestEntity ：

File f = new File("/path/fileToUpload.txt");
PostMethod filePost = new PostMethod("http://host/some_path");
Part[] parts = {
    new StringPart("param_name", "value"),
    new FilePart(f.getName(), f)
};
filePost.setRequestEntity(
    new MultipartRequestEntity(parts, filePost.getParams())
);
HttpClient client = new HttpClient();
int status = client.executeMethod(filePost);

• 我不认为你需要的内容处置一部分，用于另一个方向（当浏览器下载文件，并需要知道如何处理它）。
• getParams.setParameter 是可选的。您也可以直接在HttpClient的实例进行设置。
• AFAIK，设置请求头的顺序是无关紧要的，只要他们，然后再设定请求体均设置。
• I don't think you need the content-disposition part, that is used for the other direction (when the browser downloads a file and needs to know what to do with it).
• getParams.setParameter is optional. You can also set it directly on the HttpClient instance.
• AFAIK, the order of setting request headers is irrelevant, as long as they are all set before you set the request body.

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