MultipartEntity与UrlEncodedFormEntity

html中的form 表单有两种:除了传统的application/x-www-form-urlencoded表单,我们另一个经常用到的是上传文件用的表单,这种表单的类型为multipart/form-data。  后者主要是用来上传文件所用,所以一般情况下,在使用webservice 时,使用UrlEncodedFormEntity 比较多,UrlEncodedFormEntity 可以模拟传统的HTML表单传送POST请求中的参数,

如:html表单如下:

<form action=”http://localhost/index.html” method=”POST”>
<input type=”text” name=”param1″ value=”李三”/>
<input type=”text” name=”param2″ value=”男”/>
<inupt type=”submit” value=”submit”/>
</form>

 

代码如下:

List<NameValuePair> formParams = new ArrayList<NameValuePair>();
formParams.add(new BasicNameValuePair(“param1″, “李三”));
formParams.add(new BasicNameValuePair(“param2″, “男”));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, “UTF-8″);

MultipartEntity  则与form类型为multipart/form-data 对应,如 html from 如下:

 

<form action=”http://localhost/index.html” method=”POST”
enctype=”multipart/form-data”>
<input type=”text” name=”param1″ value=”李三”/>
<input type=”text” name=”param2″ value=”男”/>
<input type=”file” name=”param3″/>
<inupt type=”submit” value=”submit”/>
</form>

代码如下:

MultipartEntity entity = new MultipartEntity();
entity.addPart(“param1″, new StringBody(“李三”, Charset.forName(“UTF-8″)));
entity.addPart(“param2″, new StringBody(“男”, Charset.forName(“UTF-8″)));
entity.addPart(“param3″, new FileBody(new File(“C:\\pic.gif”)));


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