HTTP请求携带用户密码验证

在java操作es时，可以使用HTTP请求的方式来连接es，一般es是没有密码限制的。但当es设置了用户名密码限制的时候我们需要在HTTP请求中携带用户名和密码，如何在HTTP请求中携带用户名密码，直接上代码

public class HttpUtils {
	public static String sendPost(String url, String param) {
	
	    	OutputStreamWriter out = null;
	        BufferedReader in = null;
	        String result = "";
	        //用户名密码
	        String input = "username"+":"+"password";
	        try {
	            BASE64Encoder base = new BASE64Encoder();
	            String encodedPassword = base.encode(input.getBytes("UTF-8"));
	            URL realUrl = new URL(url);
	            // 打开和URL之间的连接
	            HttpURLConnection  conn = (HttpURLConnection) realUrl.openConnection();
	            conn.setConnectTimeout(30000);//设置连接主机超时（单位：毫秒）
	            conn.setReadTimeout(30000);//设置从主机读取数据超时（单位：毫秒）
	            
	            // 设置通用的请求属性
	            conn.setRequestProperty("Authorization", "Basic "+encodedPassword);
	            conn.setRequestProperty("accept", "*/*");
	            conn.setRequestProperty("connection", "Keep-Alive");
	            conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
	            // 发送POST请求必须设置如下两行
	            conn.setDoOutput(true);
	            conn.setDoInput(true);
	            // 获取URLConnection对象对应的输出流
	            out = new OutputStreamWriter(conn.getOutputStream(),"utf-8");
	
	            // 发送请求参数
	            out.write(param);
	            // flush输出流的缓冲
	            out.flush();
	            if(conn.getResponseCode() == HttpURLConnection.HTTP_OK) { 
	            	 InputStream inputStream = conn.getInputStream();
	                 // 定义BufferedReader输入流来读取URL的响应
	                 in = new BufferedReader(new InputStreamReader(inputStream,"utf-8"));
	                 String line;
	                 while ((line = in.readLine()) != null) {
	                     result += line;
	                 }
	            }else{
	            	InputStream errorStream = conn.getErrorStream();
	            	// 定义BufferedReader输入流来读取URL的响应
	                in = new BufferedReader(new InputStreamReader(errorStream,"utf-8"));
	                String line;
	                while ((line = in.readLine()) != null) {
	                    result += line;
	                }
	                log.error("响应失败："+conn.getResponseCode()+",响应信息"+conn.getResponseMessage()+",返回信息:"+result);
	            }
	           
	        }catch (Exception e) {
	            log.error("发送 POST 请求出现异常！"+e);
	            e.printStackTrace();
	        }
	        //使用finally块来关闭输出流、输入流
	        finally{
	            try{
	                if(out!=null){
	                    out.close();
	                }
	                if(in!=null){
	                    in.close();
	                }
	            }
	            catch(IOException ex){
	            	log.error("关闭流异常"+ex);
	                ex.printStackTrace();
	            }
	        }
	        return result;
	    }
}