电子面单是一种通过热敏纸打印输出纸质×××的物流服务。通过热感应显示文字，打印速度比传统针式打印速度提升4~6倍。电子面单以接口形式嵌入到自己的系统、网站上，可以在自己的平台操作打印电子面单。
目前电子面单接口类型有：快递公司自行提供接口、菜鸟电子面单接口、快递鸟电子面单接口。菜鸟电子面单接口、快递鸟电子面单接口接入方式类似，都支持15家快递查询，其中菜鸟不支持顺丰电子面单打印，快递鸟不支持天天、快捷等快递电子面单打印。以下先做快递鸟电子面单接口的JAVA接入示例，后面逐渐介绍其他接口其他语言的对接方式。
import java.io.BufferedReader;import java.io.IOException; import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLEncoder;import java.util.HashMap;import java.util.Map;import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;import java.security.MessageDigest; /** * * 快递鸟电子面单接口 * * @技术QQ: 4009633321 * @技术QQ群: 200121393 * @see: http://www.kdniao.com/MiandanAPI.aspx * @copyright: 深圳市快金数据技术服务有限公司 * * ID和Key请到官网申请：http://www.kdniao.com/ServiceApply.aspx */ public class KdGoldAPIDemo { //电商ID private String EBusinessID="请到快递鸟官网申请http://www.kdniao.com/ServiceApply.aspx"; //电商加密私钥，快递鸟提供，注意保管，不要泄漏 private String AppKey="请到快递鸟官网申请http://www.kdniao.com/ServiceApply.aspx"; //请求url, 正式环境地址：http://api.kdniao.cc/api/Eorderservice private String ReqURL="http://testapi.kdniao.cc:8081/api/Eorderservice"; /** * Json方式 电子面单 * @throws Exception */ public String orderOnlineByJson() throws Exception{ String requestData= "{'OrderCode': '012657700387'," + "'ShipperCode':'EMS'," + "'PayType':1," + "'ExpType':1," + "'Cost':1.0," + "'OtherCost':1.0," + "'Sender':" + "{" + "'Company':'LV','Name':'Taylor','Mobile':'15018442396','ProvinceName':'上海','CityName':'上海','ExpAreaName':'青浦区','Address':'明珠路73号'}," + "'Receiver':" + "{" + "'Company':'GCCUI','Name':'Yann','Mobile':'15018442396','ProvinceName':'北京','CityName':'北京','ExpAreaName':'朝阳区','Address':'三里屯街道雅秀大厦'}," + "'Commodity':" + "[{" + "'GoodsName':'鞋子','Goodsquantity':1,'GoodsWeight':1.0}]," + "'Weight':1.0," + "'Quantity':1," + "'Volume':0.0," + "'Remark':'小心轻放'," + "'IsReturnPrintTemplate':1}"; Map params = new HashMap (); params.put("RequestData", urlEncoder(requestData, "UTF-8")); params.put("EBusinessID", EBusinessID); params.put("RequestType", "1007"); String dataSign=encrypt(requestData, AppKey, "UTF-8"); params.put("DataSign", urlEncoder(dataSign, "UTF-8")); params.put("DataType", "2"); String result=sendPost(ReqURL, params); //根据公司业务处理返回的信息...... return result; } /** * MD5加密 * @param str 内容 * @param charset 编码方式 * @throws Exception */ @SuppressWarnings("unused") private String MD5(String str, String charset) throws Exception { MessageDigest md = MessageDigest.getInstance("MD5"); md.update(str.getBytes(charset)); byte[] result = md.digest(); StringBuffer sb = new StringBuffer(32); for (int i = 0; i < result.length; i++) { int val = result[i] & 0xff; if (val <= 0xf) { sb.append("0"); } sb.append(Integer.toHexString(val)); } return sb.toString().toLowerCase(); } /** * base64编码 * @param str 内容 * @param charset 编码方式 * @throws UnsupportedEncodingException */ private String base64(String str, String charset) throws UnsupportedEncodingException{ String encoded = Base64.encode(str.getBytes(charset)); return encoded; } @SuppressWarnings("unused") private String urlEncoder(String str, String charset) throws UnsupportedEncodingException{ String result = URLEncoder.encode(str, charset); return result; } /** * 电商Sign签名生成 * @param content 内容 * @param keyValue Appkey * @param charset 编码方式 * @throws UnsupportedEncodingException ,Exception * @return DataSign签名 */ @SuppressWarnings("unused") private String encrypt (String content, String keyValue, String charset) throws UnsupportedEncodingException, Exception { if (keyValue != null) { return base64(MD5(content + keyValue, charset), charset); } return base64(MD5(content, charset), charset); } /** * 向指定 URL 发送POST方法的请求 * @param url 发送请求的 URL * @param params 请求的参数集合 * @return 远程资源的响应结果 */ @SuppressWarnings("unused") private String sendPost(String url, Map params) { OutputStreamWriter out = null; BufferedReader in = null; StringBuilder result = new StringBuilder(); try { URL realUrl = new URL(url); HttpURLConnection conn =(HttpURLConnection) realUrl.openConnection(); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // POST方法 conn.setRequestMethod("POST"); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.connect(); // 获取URLConnection对象对应的输出流 out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8"); // 发送请求参数 if (params != null) { StringBuilder param = new StringBuilder(); for (Map.Entry entry : params.entrySet()) { if(param.length()>0){ param.append("&"); } param.append(entry.getKey()); param.append("="); param.append(entry.getValue()); System.out.println(entry.getKey()+":"+entry.getValue()); } System.out.println("param:"+param.toString()); out.write(param.toString()); } // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream(), "UTF-8")); String line; while ((line = in.readLine()) != null) { result.append(line); } } catch (Exception 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){ ex.printStackTrace(); } } return result.toString(); }}