目前有三种方式对接电子面单：

以下以快递鸟对接为例：

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; public class KdGoldAPIDemo {    //电商ID    private String EBusinessID=" ";     //电商加密私钥，注意保管，不要泄漏    private String AppKey=" ";      //请求url, 正式环境地址：http://api.kdniao.cc/api/Eorderservice    测试环境地址：http://testapi.kdniao.cc:8081/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':'SF'," +                "'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();    }}