JsApiTicket 获取

1、jsapi_ticket是什么？

jsapi_ticket是公众号用于调用微信JS接口的临时票据。正常状况下，jsapi_ticket的有效期为7200秒，经过access_token来获取。因为获取jsapi_ticket的api调用次数很是有限，频繁刷新jsapi_ticket会致使api调用受限，影响自身业务，开发者必须在本身的服务全局缓存jsapi_ticket 。

微信JS接口: 受权登陆, 分享网页等

2、注意事项

因为jsapi_ticket有效期为2小时，而且天天有实时调用量上限次数，因此最好开发的时候最好把jsapi_ticket存储起来，判断上次获取的jsapi_ticket是否有效，若是有效，就须要再次发起请求去获取jsapi_ticket了。 

 

三, 获取

添加公众号白名单

 安全中心 > 白名单 (填写服务器IP地址)

java 代码

 

 

package org.xxx.xxx.wx.util;

import lombok.extern.slf4j.Slf4j;
import com.alibaba.fastjson.JSONObject;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @Description:
 * @Auther: wuxw
 * @Date: 2019/11/20 17:38
 */
@Slf4j
public class WxSignUtil2 {
    public static String getAccessToken() {
        String access_token = "";
        String grant_type = "client_credential";//获取access_token填写client_credential
        String AppId="APPID";//第三方用户惟一凭证
        String secret="秘钥";//第三方用户惟一凭证密钥，即appsecret
        //这个url连接地址和参数皆不能变
        String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type="+grant_type+"&appid="+AppId+"&secret="+secret;

        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 链接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            is.close();
            String message = new String(jsonBytes, "UTF-8");
            log.info("受权返回消息结构体: "+message);
           JSONObject demoJson =  JSONObject.parseObject(message);
            System.out.println("受权返回消息结构体: JSON字符串："+demoJson);
            access_token = demoJson.getString("access_token");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return access_token;
    }
    public static String getTicket(String access_token) {
        String ticket = null;
        String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+ access_token +"&type=jsapi";//这个url连接和参数不能变
        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 链接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            String message = new String(jsonBytes, "UTF-8");
            JSONObject demoJson = JSONObject.parseObject(message);
            System.out.println("JSON字符串："+demoJson);
            ticket = demoJson.getString("ticket");
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ticket;
    }

    public static String SHA1(String decript) {
        try {
            MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
            digest.update(decript.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexString = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexString.append(0);
                }
                hexString.append(shaHex);
            }
            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }
}

 

package org.linlinjava.litemall.wx.web;

import lombok.extern.slf4j.Slf4j;
import com.alibaba.fastjson.JSONObject; 
import org.linlinjava.litemall.wx.util.WxSignUtil2;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.UUID;

/**
 * @Description:
 * @Auther: wuxw
 * @Date: 2019/11/20 16:28
 */
@Slf4j
@Controller
@RequestMapping("/wx/sign/config")
public class WxSignConfigController {

    @ResponseBody
    @RequestMapping(value="/getJsapiTicket", method = RequestMethod.GET)
    public Object t2(HttpServletRequest request, HttpServletResponse response) throws IOException {

        log.info("-----------------------event2----------------------");
        String url = request.getParameter("url");

        //一、获取AccessToken
        String accessToken = WxSignUtil2.getAccessToken();

        //二、获取Ticket
        String jsapi_ticket = WxSignUtil2.getTicket(accessToken);

        //三、时间戳和随机字符串
        String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
        String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳

        System.out.println("accessToken:"+accessToken+"\njsapi_ticket:"+jsapi_ticket+"\n时间戳："+timestamp+"\n随机字符串："+noncestr);

        //四、获取url
        if(url == null){
            url="www.xxx.vip/index.html";
        }
    /*根据JSSDK上面的规则进行计算，这里比较简单，我就手动写啦
    String[] ArrTmp = {"jsapi_ticket","timestamp","nonce","url"};
    Arrays.sort(ArrTmp);
    StringBuffer sf = new StringBuffer();
    for(int i=0;i<ArrTmp.length;i++){
        sf.append(ArrTmp[i]);
    }
    */

        //五、将参数排序并拼接字符串
        String str = "jsapi_ticket="+jsapi_ticket+"&noncestr="+noncestr+"&timestamp="+timestamp+"&url="+url;

        //六、将字符串进行sha1加密
        String signature =WxSignUtil2.SHA1(str);
        System.out.println("参数："+str+"\n签名："+signature);

        JSONObject obj = new JSONObject();
        obj.put("jsapi_ticket",jsapi_ticket);
        obj.put("noncestr",noncestr);
        obj.put("timestamp",timestamp);
        obj.put("url",url);
        return obj;
    }

}