我們使用HttpClient 4.x創建多部分文件post。

更新：截至HttpClient 4.3，一些類已被棄用。下面是新API的代碼：CloseableHttpClient httpClient = HttpClients.createDefault();

HttpPost uploadFile = new HttpPost("...");

MultipartEntityBuilder builder = MultipartEntityBuilder.create();

builder.addTextBody("field1", "yes", ContentType.TEXT_PLAIN);

// This attaches the file to the POST:

File f = new File("[/path/to/upload]");

builder.addBinaryBody(

"file",

new FileInputStream(f),

ContentType.APPLICATION_OCTET_STREAM,

f.getName()

);

HttpEntity multipart = builder.build();

uploadFile.setEntity(multipart);

CloseableHttpResponse response = httpClient.execute(uploadFile);

HttpEntity responseEntity = response.getEntity();

下面是帶有已棄用的HttpClient 4.0api的原始代碼片段：HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost(url);

FileBody bin = new FileBody(new File(fileName));

StringBody comment = new StringBody("Filename: " + fileName);

MultipartEntity reqEntity = new MultipartEntity();

reqEntity.addPart("bin", bin);

reqEntity.addPart("comment", comment);

httppost.setEntity(reqEntity);

HttpResponse response = httpclient.execute(httppost);

HttpEntity resEntity = response.getEntity();

總結

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