換取微信公眾號二維碼第一步需要去設(shè)置ip白名單 本機電腦的ip地址（既百度輸入ip所得到的地址）

不多說直接上代碼

package com.kosn.base.controller;import com.alibaba.fastjson.JSON; import com.kosn.base.kit.PropKit; import com.kosn.base.model.WechatQRCode; import com.kosn.base.utils.HttpClientUtil; import com.kosn.base.utils.WeixinUtill; import com.wxpay.config.WXPayConfig; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping;import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.UnsupportedEncodingException; import java.net.URL;import javax.net.ssl.HttpsURLConnection;import net.sf.json.JSONObject; import org.springframework.web.bind.annotation.ResponseBody;import java.net.URLEncoder; import java.util.Map;@Controller public class QrCodeController {private static final String APPID = "自己的APPID";private static final String SECRET = "自己的SECRET";@RequestMapping("/token")@ResponseBodypublic static String getQR() {String getTokenUrl1 = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+APPID+"&secret="+SECRET; // 微信公眾號tokenString tokenResult = HttpClientUtil.doGet(getTokenUrl1);Map<String, String> tokenResultMap = JSON.parseObject(tokenResult, Map.class);String access_token = tokenResultMap.get("access_token");return access_token;}// 臨時二維碼// sceneid 自定義參數(shù)@RequestMapping("/qrcode")@ResponseBodypublic static String qr(int sceneid) { //獲得token不再說明String assesstoken = getQR();WechatQRCode wechatQRCode = createTemporaryTicket(assesstoken, 900, sceneid);return getRQcode(wechatQRCode.getTicket());}// 永久二維碼// sceneid 自定義參數(shù)@RequestMapping("/foreverqrcode")@ResponseBodypublic static String getForeverQrCode(int sceneid) {String assesstoken = getQR();String ticket = createForeverTicket(assesstoken, sceneid);return getRQcode(ticket);}/*** @param accessToken 接口訪問憑證* @param expireSeconds 二維碼有效時間 單位為秒 最長 1800秒 （30天）* @param sceneId 場景id 臨時二維碼場景值Id為32位非0整數(shù) 永久二維碼的場景值ID取1~10000* 也就是說永久二維碼一共可以創(chuàng)建10000個 臨時的多* @return*/public static WechatQRCode createTemporaryTicket(String accessToken, int expireSeconds, int sceneId) {WechatQRCode wechatQRCode = null;// 拼接請求地址String requestUrl = " https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=TOKEN";requestUrl = requestUrl.replace("TOKEN", accessToken);// 需要提交json數(shù)據(jù)String jsonmsg = "{\"expire_seconds\":%d,\"action_name\": \"QR_SCENE\",\"action_info\":{\"scene\":{\"scene_id\":%d}}}";// 創(chuàng)建永久帶參二維碼JSONObject jsonObject = WeixinUtill.httpRequest(requestUrl, "POST", String.format(jsonmsg, expireSeconds, sceneId));if (null != jsonObject) {System.out.println(jsonObject);try {wechatQRCode = new WechatQRCode();wechatQRCode.setTicket(jsonObject.getString("ticket"));wechatQRCode.setExpire_seconds(jsonObject.getInt("expire_seconds"));System.out.println("零時帶參二維碼ticket成功=" + wechatQRCode.getTicket() + "Expire_seconds=" + wechatQRCode.getExpire_seconds());} catch (Exception e) {wechatQRCode = null;int err = jsonObject.getInt("errcode");String errormsg = jsonObject.getString("errmsg");}}return wechatQRCode;}/*** 永久二維碼** @param accessToken* @param sceneId 場景iD 1~10000* @return*/public static String createForeverTicket(String accessToken, int sceneId) {String url = null;// 拼接請求地址String requestUrl = " https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=TOKEN";requestUrl = requestUrl.replace("TOKEN", accessToken);// 需要提交json數(shù)據(jù)String jsonmsg = "{\"action_name\": \"QR_LIMIT_SCENE\",\"action_info\":{\"scene\":{\"scene_id\":%d}}}";// 創(chuàng)建永久帶參二維碼JSONObject jsonObject = WeixinUtill.httpRequest(requestUrl, "POST", String.format(jsonmsg, sceneId));if (null != jsonObject) {try {url = jsonObject.getString("ticket");} catch (Exception e) {int err = jsonObject.getInt("errcode");String errormsg = jsonObject.getString("errmsg");}}String ticke = null;try {ticke = String.format(URLEncoder.encode(url, "UTF-8"));} catch (UnsupportedEncodingException e) {e.printStackTrace();}return ticke;}public static String getRQcode(String ticket) {String filepath = null;String requestUrl = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET";requestUrl = requestUrl.replace("TICKET", ticket);// try { // URL url = new URL(requestUrl); // HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); // conn.setDoInput(true); // conn.setRequestMethod("GET"); // // if (!savepath.endsWith("/")) { // savepath += "/"; // } // // 將ticket 作為文件名 // filepath = savepath + ticket + ".jpg"; // // // 將微信服務(wù)器返回的輸入流寫入文件 // // BufferedInputStream bis = new BufferedInputStream(conn.getInputStream()); // FileOutputStream fos = new FileOutputStream(new File(filepath)); // // byte[] buf = new byte[8096]; // int size = 0; // while ((size = bis.read(buf)) != -1) // fos.write(buf, 0, size); // fos.close(); // bis.close(); // // conn.disconnect(); // } catch (Exception e) { // filepath = null; // }// return filepath;return requestUrl;}}## 所用到的工具類```java package com.kosn.base.utils;import org.apache.http.HttpEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.slf4j.LoggerFactory;/*** @author zhangbo* 2019/11*/public class HttpClientUtil {public static String doGet(String uri) {//1:創(chuàng)建一個HttpClient的實例CloseableHttpClient httpclient = HttpClients.createDefault();//2:創(chuàng)建一個get請求實例HttpGet httpGet = new HttpGet(uri);//請求的響應(yīng):CloseableHttpResponse response1 = null;try {//3:使用HttpClient的實例執(zhí)行g(shù)et請求response1 = httpclient.execute(httpGet);//http請求的狀態(tài):404 500 200 // System.out.println(response1.getStatusLine());int statusCode = response1.getStatusLine().getStatusCode();if (statusCode == 200) {//請求成功:HttpEntity entity1 = response1.getEntity();String result = EntityUtils.toString(entity1, "utf-8");return result;} else {//請求失敗:自己做自己的業(yè)務(wù)邏輯System.out.println("請求失敗......:"+statusCode);}} catch (Exception ex) {ex.printStackTrace();}return null;} } ## 要實現(xiàn)的類```java package com.kosn.base.utils;import javax.net.ssl.X509TrustManager; import java.security.cert.CertificateException; import java.security.cert.X509Certificate;public class MyX509TrustManager implements X509TrustManager {@Overridepublic void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {}@Overridepublic void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {}@Overridepublic X509Certificate[] getAcceptedIssuers() {return new X509Certificate[0];} }

微信公眾平臺接口類

package com.kosn.base.utils;import java.awt.Menu; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.ConnectException; import java.net.URL; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.TrustManager;import net.sf.json.JSONException; import net.sf.json.JSONObject; import org.slf4j.Logger; import org.slf4j.LoggerFactory; //import com.b505.pojo.*; // /*** * * * 公眾平臺通用接口工具類* * @author * ** */ public class WeixinUtill {private static Logger log = LoggerFactory.getLogger(WeixinUtill.class);/*** * * 發(fā)起https請求并獲取結(jié)果 * * * * @param requestUrl 請求地址 * * @param requestMethod 請求方式（GET、POST） * * @param outputStr 提交的數(shù)據(jù) * * @return JSONObject(通過JSONObject.get(key)的方式獲取json對象的屬性值) * */public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {JSONObject jsonObject = null;StringBuffer buffer = new StringBuffer();try {// 創(chuàng)建SSLContext對象，并使用我們指定的信任管理器初始化 TrustManager[] tm = {new MyX509TrustManager()};SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");sslContext.init(null, tm, new java.security.SecureRandom());// 從上述SSLContext對象中得到SSLSocketFactory對象 SSLSocketFactory ssf = sslContext.getSocketFactory();URL url = new URL(requestUrl);HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();httpUrlConn.setSSLSocketFactory(ssf);httpUrlConn.setDoOutput(true);httpUrlConn.setDoInput(true);httpUrlConn.setUseCaches(false);// 設(shè)置請求方式（GET/POST） httpUrlConn.setRequestMethod(requestMethod);if ("GET".equalsIgnoreCase(requestMethod))httpUrlConn.connect();// 當(dāng)有數(shù)據(jù)需要提交時 if (null != outputStr) {OutputStream outputStream = httpUrlConn.getOutputStream();// 注意編碼格式，防止中文亂碼 outputStream.write(outputStr.getBytes("UTF-8"));outputStream.close();}// 將返回的輸入流轉(zhuǎn)換成字符串 InputStream inputStream = httpUrlConn.getInputStream();InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String str = null;while ((str = bufferedReader.readLine()) != null) {buffer.append(str);}bufferedReader.close();inputStreamReader.close();// 釋放資源 inputStream.close();inputStream = null;httpUrlConn.disconnect();jsonObject = JSONObject.fromObject(buffer.toString());} catch (ConnectException ce) {log.error("Weixin server connection timed out.");} catch (Exception e) {log.error("https request error:{}", e);}return jsonObject;} }

實體類

package com.kosn.base.model;

import java.util.Objects;

public class WechatQRCode {
// 獲取的二維碼
private String ticket;
// 二維碼的有效時間,單位為秒,最大不超過2592000（即30天）
private int expire_seconds;

public String getTicket() {return ticket; }public void setTicket(String ticket) {this.ticket = ticket; }public int getExpire_seconds() {return expire_seconds; }public void setExpire_seconds(int expire_seconds) {this.expire_seconds = expire_seconds; }@Override public boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;WechatQRCode that = (WechatQRCode) o;return expire_seconds == that.expire_seconds &&Objects.equals(ticket, that.ticket); }@Override public int hashCode() {return Objects.hash(ticket, expire_seconds); }@Override public String toString() {return "WechatQRCode{" +"ticket='" + ticket + '\'' +", expire_seconds=" + expire_seconds +'}'; }

}

總結(jié)

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