java, python, golang development languages such as how to quickly generate two-dimensional code?

Free two-dimensional code generation approach very much! For example, the more famous of the two-dimensional code fodder, if only simple to use, use it enough. But if you want a large-scale production, it would not be appropriate. Furthermore many tools logo in no way to join the two-dimensional code (the same as the micro-channel two-dimensional code).

Next, I would talk about how fast, high quality, highly customizable generate a two-dimensional code.

Two-dimensional code encoding algorithm is public, which means that most of the development language can generate dynamic map. But in the two-dimensional code so widely used today, but also to build their own wheels, if not stupid, and that is being a real technology geek.

There are open-source Java-dimensional code generation library: com.google.zxing, this is the big brother to Google android open source, this library is quite strong, but a pit of force, with who knows who it
python is notoriously third-party libraries and more, how it got less two-dimensional code generation. For example: myqr, qrcode such as
other languages are not familiar with, do not discuss ...

Now that I'm talking about any development language can generate two-dimensional code, implemented independently outside apart from each language. There is also a program that calls the existing API to generate two-dimensional code. For those who want a simple to use, to control development costs or minority languages ​​to use some occasions, it is a good strategy to use the API.

Here I recommend a two-dimensional code free API generated from " green onion computing "
detailed documentation: https://www.xiaocongjisuan.com/show/api/14

API parameter passing notes:

• appKey: Interface uniquely identify the user in the background - I Interface View> -> Application Center
• openId: platform id, the system automatically generates a registration, the user background - Account Information View> -> Users

Why recommend this interface it? Since it generates only two-dimensional code is highly customizable, such as: logo, a color two-dimensional code, the background color of the two-dimensional code, the two-dimensional code size, margins and the like, is provided in detail as follows:

There are some instructions to return the value of the specific reference to the above api documentation it! Next, I posted about some use DEMO common development language.

java version:

package com.xiaocongjisuan.module.example;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

public class Application {
    
     public static final String DEF_CHATSET = "UTF-8";
      Public  static  Final  int DEF_CONN_TIMEOUT = 30000 ;
      public  static  Final  int DEF_READ_TIMEOUT = 30000 ;
      public  static String userAgent = "Mozilla / 5.0 (Windows NT 6.1) AppleWebKit / 537.36 (KHTML, like Gecko) Chrome / 29.0.1547.66 Safari / 537.36" ; 
     
     // configure your application appKey and openid 
     public  static  Final String APP_KEY = "Yours" ;
      public  static  Final String OPEN_ID = "Yours" ; 
     
     // will map-based to a request parameter type 
     public  static String urlEncode(Map<String,Object> params) {
        
        if(params==null){return "";};
         
        StringBuilder sb = new StringBuilder();
        for (Map.Entry<String,Object> i : params.entrySet()) {
            try {
                sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        String r=sb.toString ();
         IF (r.endsWith ( "&" )) { 
            R & lt = r.substring (0, r.length () -. 1 ); 
        } 
        return R & lt; 
     } 
     
     / ** 
     * 
     * @param requestUrl request address 
     * @param the params request parameter 
     * @param method request method 
     * @return request result 
     * @throws Exception
      * / 
     public  static String requestContent (String requestUrl, the Map <String, Object> the params, String method) throws Exception { 
        
        the HttpURLConnection Conn= null;
        BufferedReader reader = null;
        String rs = null;
        try {

            //组装请求链接
            StringBuffer sb = new StringBuffer();
            
            if(method!=null&&method.equalsIgnoreCase("get")){
                requestUrl = requestUrl+"?"+urlEncode(params);
            }

            //默认get
            URL url = new URL(requestUrl);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            
            if(method!=null&&method.equalsIgnoreCase("post")){
                 conn.setRequestMethod("POST");
                 conn.setDoOutput(true);
                 conn.setDoInput(true);
            }

            //参数配置
            conn.setRequestProperty("User-agent", userAgent);
            conn.setUseCaches(false);
            conn.setConnectTimeout(DEF_CONN_TIMEOUT);
            conn.setReadTimeout(DEF_READ_TIMEOUT);
            conn.setInstanceFollowRedirects(false);
            conn.connect();
            
            if (params!= null && method.equalsIgnoreCase("post")) {
                try {
                    DataOutputStream out = new DataOutputStream(conn.getOutputStream());
                    out.writeBytes(urlEncode(params));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            
            //读取数据
            InputStream is = conn.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sb.append(strRead);
            }
            rs = sb.toString();
            
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                reader.close();
            }
            if (conn != null) {
                conn.disconnect();
            }
        }
        return rs;
    }
    
    
    public static void main(String[] args) throws Exception{
        
        String domain="http://api.xiaocongjisuan.com/";
        String servlet="develop/qrcode/create";
        String method="get";
        
        String requestUrl=domain+servlet;
        Map<String,Object> params=new HashMap<String,Object>();
        params.put("appKey",APP_KEY);
        params.put("openId",OPEN_ID);

        //变动部分
        params.put("text","我是最可爱的小伙子");
        params.put("w",400);
        params.put("m",1);
        params.put("color","000000");
        params.put("bgColor","ffffff");
        
        String result=requestContent(requestUrl,params,method);
        System.out.println(result);
    }
}

python version:

# - * - Coding: UTF-8 - * - 
# flake8: noqa 
__author__ = ' wukong ' 

Import urllib
 from urllib Import urlencode 

# Configure appKey and openId you are applying 
app_key = " *** " 
open_id = " *** " 

" "" 
request_url request address 
params request parameter 
method request method 

"" " 
DEF Request_Content (request_url, params, method): 
    params = urlencode (params) 
    
    IF method and method.lower () == "get":
        f = urllib.urlopen("%s?%s" % (request_url, params))
    else:
        f = urllib.urlopen(request_url, params)
 
    content = f.read()
    print content

   
def main():
    
    domain="http://api.xiaocongjisuan.com/";
    servlet="develop/qrcode/create"
    method="get"
    request_url=domain+servlet
    
    #字典
    the params = {} 
    the params [ " AppKey " ] = app_key 
    the params [ " OpenID " ] = open_id 
    
    # variable portion of 
    the params [ " text " ] = " I is the sweetest guy " 
    the params [ " W " ] = 400 
    the params [ " m " ] =. 1 
    the params [ " Color " ] = " 000000 " 
    the params [ " bgColor " ] = "ffffff"
    
    request_content(request_url,params,method)
    
if __name__ == '__main__':
    main()

php version:

<Meta HTTP-equiv = " Content-Type " Content = " text / HTML; charset = UTF-8 " /> 
< PHP?

 / ** 
 * @author 
  * @copyright 2019 
 * / 
 
header ( " Content-of the type: text / HTML; charset = UTF-. 8 " ); // set the encoding
 
 // configure your application appKey and OpenID 
$ app_key = " *** " ; 
$ open_id = " *** " ;

 / ** 
$ URL request address 
$ params request parameter 
$ isPost request method
 * / 

function http_curl (URL $, $ the params=false,$ispost=false){
   
    $httpInfo = array();
    $ch = curl_init();

    curl_setopt( $ch, CURLOPT_HTTP_VERSION , CURL_HTTP_VERSION_1_1 );
    curl_setopt( $ch, CURLOPT_USERAGENT , "xiaocongjisuan");
    curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT , 60 );
    curl_setopt( $ch, CURLOPT_TIMEOUT , 60);
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER , true );
    
    if( $ispost )
    {
        curl_setopt( $ch , CURLOPT_POST , true );
        curl_setopt( $ch , CURLOPT_POSTFIELDS , $params );
        curl_setopt( $ch , CURLOPT_URL , $url );
    }
    else
    {
        if($params){
            curl_setopt( $ch , CURLOPT_URL , $url.'?'.$params );
        }else{
            curl_setopt( $ch , CURLOPT_URL , $url);
        }
    }
    
    $response = curl_exec( $ch );
    if ($response === FALSE) {
        //echo "cURL Error: " . curl_error($ch);
        return false;
    }
    $httpCode = curl_getinfo( $ch , CURLINFO_HTTP_CODE );
    $httpInfo = array_merge( $httpInfo , curl_getinfo( $ch ) );
    curl_close( $ch );
    
    return $response;
}

function main(){
    
    global $app_key;
    global $open_id;
    
    $domain="http://api.xiaocongjisuan.com/";
    $servlet="develop/qrcode/create";
    $method="get";
    
    $url=$domain."".$servlet;
    
    $params['appKey'] = $ App_key; 
    $ params [ ' transcodingOpenID ' ] = $ open_id;
    
     // change portion 
    $ the params [ " text " ] = " I is the sweetest guy " ; 
    $ the params [ " W " ] = 400 ; 
    $ the params [ " m " ] =. 1 ; 
    $ the params [ " Color " ] = " 000000 " ; 
    $ the params [ " bgColor " ] = " FFFFFF " ;
    
     // 
    the foreach ($ AS the params Key $ =>$value) {
        $params[$key]=mb_convert_encoding($value, "UTF-8", "GBK");
    }

    $paramstring = http_build_query($params);
    $content = http_curl($url,$paramstring,true);
    
    return $content;
}

echo main();
?>

Other languages ​​can view the detailed documentation. In fact, plainly, as long as the POST request transmission, two-dimensional code can be generated using the above method.

A method for generating the above-described two-dimensional bar code legend