Express inquiry API interface uses the logistics number to query the logistics information.Mainly used in e-commerce stores, ERP systems, WMS systems, express cabinets, banks and other enterprises.Several express logistics companies have unified interface access. It is recommended that docking interface providers can access more than one express at a time, which will save a lot of work in later technical maintenance.
At present, there are two ways to implement the API interface of courier query, one is active query, the other is subscription interface push data.Take the courier bird interface as an example (interface docking requires interface secret key, which is tested and cannot be used officially. You can apply to the courier bird website for http://www.kdniao.com/, which is a free secret key application). The last two methods are demo.
1. Active Query (Instant Query API)
1) Interface Rules
a. Query interface supports query by shipping bill number (single query, concurrent not more than 10/S).
b. Select the appropriate courier company code for the specified logistics waybill number, if the format is incorrect or if the code is incorrect, the failure information will be returned.For example, the express company code (ZTO) should be selected for the Zhongtong Express Logistics Number.
c. Logistics tracking information returned is sorted in ascending order according to the time of occurrence.
d. Interface instruction 1002.
e. Request address: Express bird
2) System-level and application-level input parameters
System-level input parameters
type
Application level input parameters
Must Require
Explain
RequestData
String
OrderCode
O
Order Number
Request content, JSON format, consistent with DataType
ShipperCode
R
Express company code
LogisticCode
R
Logistics Order Number
EBusinessID
String
R
E-commerce ID
RequestType
String
R
Request instruction type: 1002
DataSign
String
R
Data Content Signature
DataType
String
R
Request and return data type: 2-json;
3) Return result parameters
Parameter Name
type
Must Require
Explain
EBusinessID
String
R
E-commerce User ID
OrderCode
String
O
Order Number
ShipperCode
String
R
Express company code
LogisticCode
String
R
Logistics waybill number
CallBack
String
O
User ID
Success
Bool
R
Success or failure
Reason
String
O
Reasons for failure
State
String
R
Logistics Status: 0-Trackless 2-On-the-way, 3-Sign-in, 4-Problem
Traces/Logistics Track Details
AcceptTime
String
R
time
AcceptStation
String
R
describe
Remark
String
O
Remarks
4) Example JSON request
{
"OrderCode": "",
"ShipperCode": "SF",
"LogisticCode": "118650888018"
}
// "SF" is coded by Shunfeng Express Company, other codes can be downloaded on the official website of Express Bird
5) JSON return example
//No Logistics Track
{
"EBusinessID": "1109259",
"Traces":[],
"OrderCode": "",
"ShipperCode": "SF",
"LogisticCode": "118461988807",
"Success": true,
"Reason": null
}
//with logistics tracks
{
"EBusinessID": "1109259",
"OrderCode":"",
"ShipperCode": "SF",
"LogisticCode": "118461988807",
"Success": true,
"CallBack":"",
"State": 3,
"Reason": null,
"Traces":[
{
"AcceptTime": "2014/06/25 08:05:37",
"AcceptStation": "Delivering." (Deliver: Dun Yufu, Phone: 18718866310) [Shenzhen]),
"Remark": null
},
{
"AcceptTime": "2014/06/25 04:01:28",
"AcceptStation": "Express at Shenzhen Distribution Center, ready for next stop in Shenzhen [Shenzhen]".
"Remark": null
},
{
"AcceptTime": "2014/06/2501:41:06",
"AcceptStation": "Express in Shenzhen Distribution Center [Shenzhen]"
"Remark": null
},
{
"AcceptTime": "2014/06/24 20:18:58",
"AcceptStation": "Received [Shenzhen]",
"Remark": null
},
{
"AcceptTime": "2014/06/24 20:55:28",
"AcceptStation": "Express in Shenzhen, ready for delivery to the next Shenzhen Distribution Center [Shenzhen]".
"Remark": null
},
{
"AcceptTime": "2014/06/25 10:23:03",
"AcceptStation": "Dispatch signed [Shenzhen]",
"Remark": null
},
{
"AcceptTime": "2014/06/25 10:23:03",
"AcceptStation": "Signed to: signed [Shenzhen]",
"Remark": null
}
]
}
Subscription Interface Push Data (Logistics Tracking API)
Subscription query interface is a customized service. Users can subscribe order information to the courier company. After the courier company updates its tracks, the real-time interface will be converted into a standard form, which will be pushed to the user to play the role of real-time pushing and improve efficiency.
At the same time, the data subscribed by the user can also choose whether to notify the courier to come to the door or not to place an order online.In addition, courier bird has other interface schemes such as on-the-way monitoring, electronic polygon sheets and so on, which can be selected according to the company's needs.
1) Interface Rules
a. Information received by the order (information distributed to the network, salesperson) will be pushed to the customer through the push interface (subscription concurrent no more than 30 times/S) the customer needs to implement the interface as required.
b. Only Json format is supported.
c. Request instruction 1008.
d. Test interface address: http://testapi.kdniao.cc:8081/api/dist
e. Change to the official address after the joint adjustment is passed: http://api.kdniao.cc/api/dist
f, Distribution and Subscription interfaces require the client to implement the callback interface, callback RequestType(1008)
2) System-level and application-level parameters
System-level input parameters
Application level input parameters
type
Is it necessary
describe
RequestData (required parameters, request content, JSON format, must match DataType)
CallBack
String
O
User-defined callback information
MemberID
String
O
Membership ID (alternate field)
WareHouseID
String
O
Warehouse identification (alternate fields)
CustomerName
String
O
Electronic form customer account
(with express site applications)
CustomerPwd
String
O
Electronic Face Single Password
SendSite
String
O
Recipient Point Identification
ShipperCode
String
R
Express company code
LogisticCode
String
R
Courier number
OrderCode
String
O
Order Number
MonthCode
String
O
Month-end code
PayType
Int
O
Postage payment method:
1-Cash, 2-Cash, 3-Month Closed, 4-Third Party Payment
ExpType
String
O
Express type: 1-Standard Express
Cost
Double
O
Shipping (Freight)
OtherCost
Double
O
Other expenses
Receiver
Company
String
O
Recipient Company
Name
String
O
Addressee
Tel
String
O
Telephone
Mobile
String
O
Mobile phone
PostCode
String
O
Recipient Zip Code
ProvinceName
String
O
Recipient Province (e.g. Guangdong Province, do not lack "Province")
CityName
String
O
Recipient City (e.g. Shenzhen, do not lack "City")
ExpAreaName
String
O
Recipient area (e.g. Futian area, do not lack "District" or "County")
Address
String
O
Recipient Detailed Address
Sender
Company
String
O
Sender Company
Name
String
O
Sender
Tel
String
O
Sender Phone
Mobile
String
O
Sender Mobile
PostCode
String
O
Sender Zip Code
ProvinceName
String
O
Sending Province (e.g. Guangdong Province, do not lack "Province")
CityName
String
O
Sending City (e.g. Shenzhen, do not lack "City")
ExpAreaName
String
O
Sending area (e.g. Futian area, do not lack "district" or "county")
Address
String
O
Send Detailed Address
StartDate
String
O
Home pick-up period:
"yyyy-MM-dd HH:mm:ss" format, all the time formats in this article are the same
EndDate
String
O
Weight
Double
O
Total weight of items kg
Quantity
Int
O
Number of Parcels/Parcels
Volume
Double
O
Total Item Volume m3
Remark
String
O
Remarks
IsNotice
Int
O
Whether to distribute to express companies: 1-No distribution; 0-Distribution. Default 0
IsSendMessage
Int
O
Whether to subscribe to SMS
0-No; 1-Need
AddService
Name
String
0
Value added service name
Value
String
0
Value-added service value
CustomerID
String
0
Customer ID (optional)
Commodity
GoodsName
String
O
Commodity Name
GoodsCode
String
O
Commodity Code
Goodsquantity
Int
O
Number
GoodsPrice
Double
O
commodity price
GoodsWeight
Double
O
Commodity weight kg
GoodsDesc
String
O
Commodity description
GoodsVol
Double
O
Commodity volume m3
EBusinessID
String
R
Merchant ID
RequestType
String
R
Request instruction type: 1008
DataSign
String
R
Data Content Signature
DataType
String
R
Request and return data type: 2-json;
3) Return result parameters
- Synchronous return
Parameter Name
type
Must Require
Explain
EBusinessID
String
R
E-commerce User ID
UpdateTime
String
R
time
Success
Bool
R
Success or failure: true,false
Reason
String
O
Reasons for failure
EstimatedDeliveryTime
String
O
Estimated order arrival time yyy-mm-dd
4) Example JSON request
{
"ShipperCode":"SF",
"OrderCode":"SF201608081055208281",
"LogisticCode":"3100707578976",
"PayType":"1",
"ExpType":"1",
"CustomerName":"",
"CustomerPwd":"",
"MonthCode":"",
"IsNotice":"0",
"Sender":{
"Name":"1255760",
"Tel":"",
"Mobile":"13700000000",
ProvinceName: Guangdong Province,
CityName: "Shenzhen".
ExpAreaName: Fukuda District,
Address: "Test Address"
},
"Receiver":{
"Name":"1255760",
"Tel":"",
"Mobile":"13800000000",
ProvinceName: Guangdong Province,
CityName: "Shenzhen".
ExpAreaName: "Longhua New Area".
Address: "Test Address 2"
},
"Commodity":[
{
GoodsName: "Book"
}
]
}
5) JSON return example
{
"EBusinessID":"1151847",
"UpdateTime": "2016-08-0916:42:38",
"Success": true,
"Reason": ""
"EstimatedDeliveryTime":"2016-8-12"
}
Instant Query APIdemo
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.security.MessageDigest;
import java.util.HashMap;
import java.util.Map;
/*
- Express Bird Logistics Track Instant Query Interface
- E-commerce ID s and private keys in DEMO are for testing purposes only. Register your account separately for formal environment
- More than 500 inquiries per day, recommended access to our logistics track subscription push interface
- ID and Key please go to the official website to apply: http://www.kdniao.com/ServiceApply.aspx
*/
public class KdniaoTrackQueryAPI {
//DEMO
public static void main(String[] args) {
KdniaoTrackQueryAPI api = new KdniaoTrackQueryAPI();
try {
String result = api.getOrderTracesByJson("ANE", "210001633605");
System.out.print(result);
} catch (Exception e) {
e.printStackTrace();
}
}
//E-commerce ID
private String EBusinessID="Please apply to the Express Bird website http://www.kdniao.com/ServiceApply.aspx";
//E-commerce encryption private key, courier bird provided, take care to keep, do not leak
private String AppKey="Please apply to the Express Bird website http://www.kdniao.com/ServiceApply.aspx";
//Request url
private String ReqURL="http://api.kdniao.cc/Ebusiness/EbusinessOrderHandle.aspx";
/**
* Json Method Query Order Logistics Track
* @throws Exception
*/
public String getOrderTracesByJson(String expCode, String expNo) throws Exception{
String requestData= "{'OrderCode':'','ShipperCode':'" + expCode + "','LogisticCode':'" + expNo + "'}";
Map<String, String> params = new HashMap<String, String>();
params.put("RequestData", urlEncoder(requestData, "UTF-8"));
params.put("EBusinessID", EBusinessID);
params.put("RequestType", "1002");
String dataSign=encrypt(requestData, AppKey, "UTF-8");
params.put("DataSign", urlEncoder(dataSign, "UTF-8"));
params.put("DataType", "2");
String result=sendPost(ReqURL, params);
//Return information based on company business processes...
return result;
}
/**
* MD5 encryption
* @param str content
* @param charset Encoding Method
* @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 Code
* @param str content
* @param charset Encoding Method
* @throws UnsupportedEncodingException
*/
private String base64(String str, String charset) throws UnsupportedEncodingException{
String encoded = base64Encode(str.getBytes(charset));
return encoded;
}
@SuppressWarnings("unused")
private String urlEncoder(String str, String charset) throws UnsupportedEncodingException{
String result = URLEncoder.encode(str, charset);
return result;
}
/**
* E-commerce Sign ature Generation
* @param content content
* @param keyValue Appkey
* @param charset Encoding Method
* @throws UnsupportedEncodingException ,Exception
* @return DataSign autograph
*/
@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);
}
/**
* Send a request for a POST method to a specified URL
* @param url URL to send the request
* @param params Requested parameter set
* @return Response results from remote resources
*/
@SuppressWarnings("unused")
private String sendPost(String url, Map<String, String> params) {
OutputStreamWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try {
URL realUrl = new URL(url);
HttpURLConnection conn =(HttpURLConnection) realUrl.openConnection();
// Sending a POST request must be set to two lines
conn.setDoOutput(true);
conn.setDoInput(true);
// POST Method
conn.setRequestMethod("POST");
// Setting common request properties
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();
// Gets the output stream corresponding to the URLConnection object
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
// Send Request Parameters
if (params != null) {
StringBuilder param = new StringBuilder();
for (Map.Entry<String, String> 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());
}
// Buffering of flush output stream
out.flush();
// Define the BufferedReader input stream to read the response of the URL
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
}
//Use finally blocks to close output and input streams
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result.toString();
}
private static char[] base64EncodeChars = new char[] {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/' };
public static String base64Encode(byte[] data) {
StringBuffer sb = new StringBuffer();
int len = data.length;
int i = 0;
int b1, b2, b3;
while (i < len) {
b1 = data[i++] & 0xff;
if (i == len)
{
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
sb.append("==");
break;
}
b2 = data[i++] & 0xff;
if (i == len)
{
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
sb.append("=");
break;
}
b3 = data[i++] & 0xff;
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
sb.append(base64EncodeChars[b3 & 0x3f]);
}
return sb.toString();
}}
Logistics Tracking APIdemo
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 java.security.MessageDigest;
/*
- Express Bird Subscription Push 2.0 Interface
- ID and Key please go to the official website to apply: http://www.kdniao.com/ServiceApply.aspx
*/
public class KdniaoSubscribeAPI {
//DEMO
public static void main(String[] args) {
KdniaoSubscribeAPI api = new KdniaoSubscribeAPI();
try {
String result = api.orderTracesSubByJson();
System.out.print(result);
} catch (Exception e) {
e.printStackTrace();
}
}
//E-commerce ID
private String EBusinessID="Please apply to the Express Bird website http://www.kdniao.com/ServiceApply.aspx";
//E-commerce encryption private key, courier bird provided, take care to keep, do not leak
private String AppKey="Please apply to the Express Bird website http://www.kdniao.com/ServiceApply.aspx";
//Test request url
private String ReqURL = "http://testapi.kdniao.cc:8081/api/dist";
//Formal request url
//private String ReqURL = "http://api.kdniao.cc/api/dist";
/**
* Json Mode Logistics Information Subscription
* @throws Exception
*/
public String orderTracesSubByJson() throws Exception{
String requestData="{'OrderCode': 'SF201608081055208281'," +
"'ShipperCode':'SF'," +
"'LogisticCode':'3100707578976'," +
"'PayType':1," +
"'ExpType':1," +
"'CustomerName':'',"+
"'CustomerPwd':''," +
"'MonthCode':''," +
"'IsNotice':0," +
"'Cost':1.0," +
"'OtherCost':1.0," +
"'Sender':" +
"{" +
"'Company':'LV','Name':'Taylor','Mobile':'15018442396','ProvinceName':'Shanghai','CityName':'Shanghai','ExpAreaName':'Qingpu District','Address':'No. 73 Mingzhu Road'}," +
"'Receiver':" +
"{" +
"'Company':'GCCUI','Name':'Yann','Mobile':'15018442396','ProvinceName':'Beijing','CityName':'Beijing','ExpAreaName':'Chaoyang District','Address':'Yaxiu Building, Sanlitun Street'}," +
"'Commodity':" +
"[{" +
"'GoodsName':'shoes','Goodsquantity':1,'GoodsWeight':1.0}]," +
"'Weight':1.0," +
"'Quantity':1," +
"'Volume':0.0," +
"'Remark':'Handle with care'}";
Map<String, String> params = new HashMap<String, String>();
params.put("RequestData", urlEncoder(requestData, "UTF-8"));
params.put("EBusinessID", EBusinessID);
params.put("RequestType", "1008");
String dataSign=encrypt(requestData, AppKey, "UTF-8");
params.put("DataSign", urlEncoder(dataSign, "UTF-8"));
params.put("DataType", "2");
String result=sendPost(ReqURL, params);
//Return information based on company business processes...
return result;
}
/**
* MD5 encryption
* @param str content
* @param charset Encoding Method
* @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 Code
* @param str content
* @param charset Encoding Method
* @throws UnsupportedEncodingException
*/
private String base64(String str, String charset) throws UnsupportedEncodingException{
String encoded = base64Encode(str.getBytes(charset));
return encoded;
}
@SuppressWarnings("unused")
private String urlEncoder(String str, String charset) throws UnsupportedEncodingException{
String result = URLEncoder.encode(str, charset);
return result;
}
/**
* E-commerce Sign ature Generation
* @param content content
* @param keyValue Appkey
* @param charset Encoding Method
* @throws UnsupportedEncodingException ,Exception
* @return DataSign autograph
*/
@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);
}
/**
* Send a request for a POST method to a specified URL
* @param url URL to send the request
* @param params Requested parameter set
* @return Response results from remote resources
*/
@SuppressWarnings("unused")
private String sendPost(String url, Map<String, String> params) {
OutputStreamWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try {
URL realUrl = new URL(url);
HttpURLConnection conn =(HttpURLConnection) realUrl.openConnection();
// Sending a POST request must be set to two lines
conn.setDoOutput(true);
conn.setDoInput(true);
// POST Method
conn.setRequestMethod("POST");
// Setting common request properties
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();
// Gets the output stream corresponding to the URLConnection object
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
// Send Request Parameters
if (params != null) {
StringBuilder param = new StringBuilder();
for (Map.Entry<String, String> 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());
}
// Buffering of flush output stream
out.flush();
// Define the BufferedReader input stream to read the response of the URL
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
}
//Use finally blocks to close output and input streams
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result.toString();
}
private static char[] base64EncodeChars = new char[] {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/' };
public static String base64Encode(byte[] data) {
StringBuffer sb = new StringBuffer();
int len = data.length;
int i = 0;
int b1, b2, b3;
while (i < len) {
b1 = data[i++] & 0xff;
if (i == len)
{
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
sb.append("==");
break;
}
b2 = data[i++] & 0xff;
if (i == len)
{
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
sb.append("=");
break;
}
b3 = data[i++] & 0xff;
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
sb.append(base64EncodeChars[b3 & 0x3f]);
}
return sb.toString();
}}