Java for WeChat development to obtain WeChat timestamp, nonceStr, signature method-WeChat Development-php.cn

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Java for WeChat development to obtain WeChat timestamp, nonceStr, signature method

高洛峰

Mar 26, 2017 pm 02:48 PM

WeChat development

According to WeChat’s official documents and case code, the above three parameters are necessary, and the above three parameters are obtained dynamically. Then, next, we use java code to achieve the acquisition according to WeChat’s official documents. The three parameters of timestamp, nonceStr, and signature are just a main method here to print and output. This lesson does not implement passing these three parameters to the web page and successfully calling up the WeChat jsapi. The next lesson will focus on the explanation. .

##Sign code:

package com.test.util;
import java.util.UUID;
import java.util.Map;
import java.util.HashMap;
import java.util.Formatter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.io.UnsupportedEncodingException;  
  public class Sign {
    public static void main(String[] args) {
        String jsapi_ticket =JsapiTicketUtil.getJSApiTicket();;
        // 注意 URL 一定要动态获取，不能 hardcode
        String url = "http://www.vxzsk.com/xx/x.do";//url是你请求的一个action或者controller地址，并且方法直接跳转到使用jsapi的jsp界面
        Map<String, String> ret = sign(jsapi_ticket, url);
        for (Map.Entry entry : ret.entrySet()) {
            System.out.println(entry.getKey() + ", " + entry.getValue());
        }
    };
  public static Map<String, String> sign(String jsapi_ticket, String url) {
        Map<String, String> ret = new HashMap<String, String>();
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        String string1;
        String signature = "";
 
        //注意这里参数名必须全部小写，且必须有序
        string1 = "jsapi_ticket=" + jsapi_ticket +
                  "&noncestr=" + nonce_str +
                  "&timestamp=" + timestamp +
                  "&url=" + url;
        System.out.println(string1);
 
        try
        {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(string1.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
        }
        catch (NoSuchAlgorithmException e)
        {
            e.printStackTrace();
        }
        catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        }
 
        ret.put("url", url);
        ret.put("jsapi_ticket", jsapi_ticket);
        ret.put("nonceStr", nonce_str);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);
 
        return ret;
    }
 
    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash)
        {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }
 
    private static String create_nonce_str() {
        return UUID.randomUUID().toString();
    }
 
    private static String create_timestamp() {
        return Long.toString(System.currentTimeMillis() / 1000);
    }
}

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The variable url in the main method on line 16 is the one you requested action or controller address, and the method jumps directly to the jsp interface using jsapi

Get the jsapi_ticket tool class code:

Readers can directly copy the code to myeclipse or Eclipse and run the main method, but here we remind readers to obtain it from

package com.test.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
 
import net.sf.json.JSONObject;
import com.test.weixin.TestAcessToken;
/***
 * @author V型知识库  www.vxzsk.com
 *
 */
public class JsapiTicketUtil {
     
    /***
     * 模拟get请求
     * @param url
     * @param charset
     * @param timeout
     * @return
     */
     public static String sendGet(String url, String charset, int timeout)
      {
        String result = "";
        try
        {
          URL u = new URL(url);
          try
          {
            URLConnection conn = u.openConnection();
            conn.connect();
            conn.setConnectTimeout(timeout);
            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));
            String line="";
            while ((line = in.readLine()) != null)
            {
             
              result = result + line;
            }
            in.close();
          } catch (IOException e) {
            return result;
          }
        }
        catch (MalformedURLException e)
        {
          return result;
        }
       
        return result;
      }
     public static String getAccessToken(){
            String appid="你公众号基本设置里的应用id";//应用ID
            String appSecret="你公众号基本设置里的应用密钥";//(应用密钥)
            String url ="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appid+"&secret="+appSecret+"";
            String backData=TestAcessToken.sendGet(url, "utf-8", 10000);
            String accessToken = (String) JSONObject.fromObject(backData).get("access_token");  
            return accessToken;
     }
     
    public static String getJSApiTicket(){ 
        //获取token
        String acess_token= JsapiTicketUtil.getAccessToken();
        String urlStr = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+acess_token+"&type=jsapi";  
        String backData=TestAcessToken.sendGet(urlStr, "utf-8", 10000);  
        String ticket = (String) JSONObject.fromObject(backData).get("ticket");  
        return  ticket;  
           
    }  
     
    public static void main(String[] args) {
        String jsapiTicket = JsapiTicketUtil.getJSApiTicket();
        System.out.println("调用微信jsapi的凭证票为："+jsapiTicket);
 
    }
 
}

Copy after login

JsapiTicketUtil In the acces_token method, readers need to fill in their own appid and appsecret.

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