Java 应用程序通过 POST 发送（无代码）
我现在没有可用的代码，但稍后我会描述我的情况并发布代码:)。基本上，我的问题是通过 POST（从 Java 桌面应用程序/客户端）将图像上传到服务器。我在这里找到了一些关于这个问题的讨论，但它要么包括使用 org.apache.commons.httpclient 类，并且我使用 URLConnection 类实现了大部分代码，要么其中存在错误。检查此选定的答案，以尽可能详细地了解我遵循的内容：使用 java.net.URLConnection 来触发和处理 HTTP 请求
不管怎样，我在本地服务器上创建了 php 脚本来处理文件上传的表单。我从与 .php 一起创建的一个静态 html 中检查了它。然后我在没有上传文件的情况下检查了它，它工作正常。 当我发送纯文本文件时它也可以正常工作。这看起来像是与编码相关的问题。也许某个奇怪的角色正在破坏我的传输？
正如我所说，今天晚些时候如有必要，我将添加代码，但我对您在通过 POST 发送时与编码图像相关的意见/经验感兴趣。我应该做其他事情，上面的链接中没有提到。
问题：通过 http post 以多部分消息发送二进制文件时，是否需要对实际数据使用某种编码？
抱歉，现在没有代码。
干杯
I don't have the code available right now, but I'll describe my situation and post code later on :). Basically, my problem is with uploading image to server via POST (from Java desktop application / client). I found some discussions here on this matter, but it either included using org.apache.commons.httpclient classes, and I have most of the code implemented using URLConnection class, OR with bugs in it. Check this selected answer to see what I followed in as much detail as possible: Using java.net.URLConnection to fire and handle HTTP requests
Anyways, I created php script on my local server that handles form with file upload. I checked it from one static html that was created along with .php. I then checked it without file upload, and it works ok.
It also works ok when I send plain text file. This looks like a problem related to encoding. Maybe some strange character is breaking my transfer?
As I said, I'll include code if necessary later today, but I'm interested in your opinions / experience related to encoding images when sending via POST. Should I do something else, that's not being mentioned in the link above.
QUESTION: do I need to use some kind of encoding to actual data when sending binary file in multipart message via http post?
Sorry for no code right now.
Cheers
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至于你的问题：是的，你需要对文件进行编码。
我会为此使用 HttpClient，因为它会为您处理所有这些事情。无需重新发明轮子。请参阅如何上传使用 Java HttpClient 库与 PHP 一起使用的文件 代码。
As for your question: yes, you need to encode the file.
I would use HttpClient for this as it takes care of all those things for you. No need to reinvent the wheel. See How to upload a file using Java HttpClient library working with PHP for code.
如果您使用 URLConnection 手动处理多部分/表单数据，我想您需要将“Content-Transfer-Encoding：binary”添加到图像部分。请参阅 W3C 文档。
If you are using URLConnection to handle multipart/form-data manually, I guess you you need to add "Content-Transfer-Encoding: binary" to the image part. See W3C's docs.