记录下微信获取openId和token（java实现）-白红宇

记录下微信获取openId和token（java实现）

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发布时间：2019-06-19

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最近在写微信相关接口，我真的是。。。。哎

首先先写个url请求工具类

import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;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;    }

获取token（因为token2小时会过期，我起了个定时任务，项目启动后2小时会自动获取token，并且加入缓存，需要放到服务器去测试，不然搞不了。。。应该是微信安全做了什么措施）

//地址 public static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APP_ID&secret=SECRET";

import net.sf.json.JSONObject; public static String getAccessToken(String appId, String secret) {        String backData = sendGet(TOKEN_URL.replace("APP_ID", appId).replace("SECRET", secret), "utf-8", 10000);        log.info("============》获取accessToken{}", JSON.toJSONString(backData));        String accessToken = (String) JSONObject.fromObject(backData).get("access_token");        return accessToken;    }

maven配置


                
                    
         
          net.sf.json-lib
                     
         
          json-lib-ext-spring
                     
         
          1.0.2

获取ticket

public static String getJSApiTicket(String acessToken) {        //获取token        String urlStr = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + acessToken + "&type=jsapi";        String backData = sendGet(urlStr, "utf-8", 10000);        String ticket = (String) JSONObject.fromObject(backData).get("ticket");        return ticket;    }

获取public_number_openId

//APP_ID和SECRET写成自己的即可public static final String PUBLIC_NUMBER_OPEN_ID_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APP_ID&secret=SECRET&code=CODE&grant_type=authorization_code";public static Map
      
        getPublicNumberOpenId(String code) {        Map
       
         returnMap = new HashMap<>();        //获取token        log.info("==========》获取unionID,code是：" + code);        String backData = sendGet(PUBLIC_NUMBER_OPEN_ID_URL.replace("CODE", code), "utf-8", 10000);        log.info("==========》获取openID：" + backData);        String openId = (String) JSONObject.fromObject(backData).get("openid");        returnMap.put("openId", openId);        return returnMap;    }

获取small_program_openId

//APP_ID和SECRET换成自己public static final String SMALL_PROGRAM_OPEN_ID_URL = "https://api.weixin.qq.com/sns/jscode2session?appid=APP_ID&secret=SECRET&js_code=CODE&grant_type=authorization_code";public static Map
      
        getSmallProgramOpenId(String code) {        Map
       
         returnMap = new HashMap<>();        //获取token        log.info("==========》获取unionID,code是：" + code);        String backData = sendGet(SMALL_PROGRAM_OPEN_ID_URL.replace("CODE", code), "utf-8", 10000);        log.info("==========》获取openID：" + backData);        String openId = (String) JSONObject.fromObject(backData).get("openid");        returnMap.put("openId", openId);        return returnMap;    }