java如何發送httphead請求？

實現思路就是先定義請求頭內容，之后進行請求頭設置。；定義請求頭；LinkedHashMap<String,String> headers = new LinkedHashMap<String,String>();；headers.put("Content-type","text/xml");；headers.put("Cache-Control", "no-cache");；headers.put("Connection", "close");；給HttpPost 設置請求頭；

HttpPost httpPost = new HttpPost("地址");；if (headers != null) {；for (String key : headers.keySet()) {；httpPost.setHeader(key, headers.get(key));；}；}；備注：只需要在map中設置相應的請求頭內容即可。根據實際需要修改即可