httoclient类中的postmethod方法中用需要传入的参数是什么

　　用PostMethod 模拟http post请求，需要解决传递字符串，文件等需求。
　　httpclient对此，提供了对应实现，实现方法关键在：RequestEntity。
　　示例：
　　RequestEntity requestEntity = newStringRequestEntity(text);
　　post.setRequestEntity(requestEntity);
　　示例中，是传递一个普通字符型参数。
　　这个方法代替了以前直接设置Request body。
　　RequestEntity是一个接口，有很多实现：　　ByteArrayRequestEntity, FileRequestEntity, InputStreamRequestEntity, MultipartRequestEntity, StringRequestEntity
　　基本上从名字上就可以直接看出功能，可以从字符串，流，文件，字节数组中产生request body。
　　还有更复杂的Multipart，就是夹杂文件和普通字段的提交。
　　示例如下：　　Part[] parts = {new StringPart("source", "695132533"), new StringPart("status", URLEncoder.encode(status, "utf-8")), filePart};　　postMethod.setRequestEntity(new MultipartRequestEntity(parts, postMethod.getParams()));

url 和 post的参数，下面是我搜到的，你参考下吧

private static void post() throws IOException{
URL url = new URL(" http://www.baidu.com");// 提交地址
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setDoOutput(true);// 打开写入属性
httpURLConnection.setDoInput(true);// 打开读取属性
httpURLConnection.setRequestMethod("POST");// 设置提交方法
httpURLConnection.setRequestProperty("Content-Type","text/xml;charset=UTF-8");//
httpURLConnection.setRequestProperty("SOAPAction", " http://WebXml.com.cn/getWeatherbyCityName");
httpURLConnection.setRequestProperty("User-Agent", "Jakarta Commons-HttpClient/3.1");
httpURLConnection.setConnectTimeout(50000);// 连接超时时间
httpURLConnection.setReadTimeout(50000);
httpURLConnection.connect();

BufferedWriter out = new BufferedWriter(new OutputStreamWriter(httpURLConnection.getOutputStream()));
out.write("name=1&pwd=2");
out.flush();
out.close();

//读取post之后的返回值
BufferedReader in = new BufferedReader(new InputStreamReader((InputStream) httpURLConnection.getInputStream(),"UTF-8"));
String line = null;
StringBuilder sb = new StringBuilder();
while ((line = in.readLine()) != null) {
sb.append(line);
}
in.close();
System.out.println("client:" + sb.toString());
httpURLConnection.disconnect();//断开连接
}

url地址