使用HttpClient POST提交带有上载的表单



我有一个html表单,看起来像这样:

<div class="field>
  <input id="product_name" name="product[name]" size="30" type="text"/>
</div>
<div class="field>
  <input id="product_picture" name="product[picture]" size="30" type="file"/>
</div>

我想写一个Java模块来自动创建产品。这是我已经拥有的:

HttpHost host = new HttpHost("localhost", 3000, "http");
HttpPost httpPost = new HttpPost("/products");
List<BasicNameValuePair> data = new ArrayList<BasicNameValuePair>();
data.add(new BasicNameValuePair("product[name]", "Product1"));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(data, "UTF-8");
httpPost.setEntity(entity);
HttpResponse postResponse = httpClient.execute(host, httpPost); 

这很好,它可以创建名为"Product1"的新产品。但我不知道如何处理上传部分。我想要这样的东西:

data.add(new BasicNameValuePair("product[name]", "Product1"));

但它不是"产品1",而是一个文件。我读了HttpClient的文档,据说只有字符串。

有人知道如何处理上传部分吗?

依赖项:

<dependency>
 <groupid>org.apache.httpcomponents</groupid>
 <artifactid>httpclient</artifactid>
 <version>4.0.1</version>
</dependency>
<dependency>
 <groupid>org.apache.httpcomponents</groupid>
 <artifactid>httpmime</artifactid>
 <version>4.0.1</version>
</dependency>

代码:〔狡猾的部分是使用多部分实体〕

HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION,HttpVersion.HTTP_1_1);
HttpPost post = new HttpPost( url );
MultipartEntity entity = new MultipartEntity( HttpMultipartMode.BROWSER_COMPATIBLE );
// For File parameters
entity.addPart( paramName, new FileBody((( File ) paramValue ), "application/zip" ));
// For usual String parameters
entity.addPart( paramName, new StringBody( paramValue.toString(), "text/plain", Charset.forName( "UTF-8" )));
post.setEntity( entity );
// Here we go!
String response = EntityUtils.toString( client.execute( post ).getEntity(), "UTF-8" );
client.getConnectionManager().shutdown();

另一种处理HTTP请求的更快方法是使用curl。

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