First list the blog posts for reference:
1. Generate and scan the QR code with parameters for the development of WeChat official account:
https://blog.csdn.net/qq_23543983/article/details/80228558
2. Generate a scene value by assembling multiple parameters:
https://www.qinziheng.com/xiaochengxudev/7203.htm
3. For details on generating a QR code with parameters, please refer to the official website document:
https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Receiving_event_pushes.html
4. Specific steps: can be generated on the WeChat test platform https://mp.weixin.qq.com/debug
Steps: Generate access_token---->get ticket------>get QR code
Paste the code directly below:
One: the main code
/**
* Copyright (C), 2018-2020, XXX有限公司
* FileName: WeixinController
* Author: zhanglei
* Date: 2020/8/11 10:28
* Description:
* History:
* <author> <time> <version> <desc>
* 作者姓名 修改时间 版本号 描述
*/
package com.asyware.game.controller;
import com.asyware.game.utils.AccessTokenCache;
import com.asyware.game.utils.MyX509TrustManager;
import com.asyware.game.vo.AccessToken;
import io.swagger.annotations.*;
import lombok.extern.slf4j.Slf4j;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.springframework.web.bind.annotation.*;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
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 java.security.SecureRandom;
import java.util.Map;
import static com.asyware.game.utils.WeiXinUtil.httpRequest;
/**
* 〈一句话功能简述〉<br>
* 〈〉
*
* @author zhanglei
* @create 2020/8/11
* @since 1.0.0
*/
@RestController
@RequestMapping("/weixin")
@CrossOrigin
@Api(tags = "二维码")
@Slf4j
public class WeixinController {
// 获取Ticket
public final static String ticket_url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=";
//获取二维码
public final static String erweima="https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=";
/**
* 通过商户id获取ticket,返回二维码url
* @param type 1_1 [第一个1:商户id 第二个1:代表关注二维码,2:代表核销二维码]
* @return
*/
@ApiImplicitParams({
@ApiImplicitParam(name="type",value = "1_1 [第一个1:商户id 第二个1:代表关注二维码,2:代表核销二维码]",required = false,dataType = "String",paramType = "path",example = "blues")
})
@ApiResponses({
@ApiResponse(code = 200,message = "接口返回成功状态"),
@ApiResponse(code = -1,message = "接口返回失败状态")
})
@ApiOperation(value = "通过商户id获取ticket,返回二维码url",notes = "")
@PostMapping("/getTicket")
public String getTicket(
@RequestParam(name="type",required = true) String type){
Map<String,Object> map = AccessTokenCache.getInstance().getAcessTokenAndExpiresIn("自己的appid","自己的appsecret");
String accessToken = (String)map.get("access_token");
//body
String uu="{\"action_name\": \"QR_LIMIT_STR_SCENE\", \"action_info\": {\"scene\": {\"scene_str\":"+type+"}}}";
System.out.println(uu);
JSONObject jsonObject = httpRequest(ticket_url+accessToken,"POST", uu);
String ticket = jsonObject.getString("ticket");
//二维码
String ss=erweima+ticket;
return ss;
}
}
At this step, the ticket returned is the ticket. If you want to get the QR code, just enter the ticket returned above in the browser, because it is a get interface;
Two: AccessTokenCache class
/**
* Copyright (C), 2018-2020, XXX有限公司
* FileName: AccessTokenCache
* Author: zhanglei
* Date: 2020/8/11 9:30
* Description:
* History:
* <author> <time> <version> <desc>
* 作者姓名 修改时间 版本号 描述
*/
package com.asyware.game.utils;
/**
* 〈一句话功能简述〉<br>
* 〈〉
*
* @author zhanglei
* @create 2020/8/11
* @since 1.0.0
*/
import com.asyware.game.vo.AccessToken;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* 单例设计模式 缓存 accessToken expires_in
*/
public class AccessTokenCache {
//缓存accessToken的Map,map中包含accessToken,expiresIn和缓存的时间戳time
private Map<String, String> map = new HashMap<String,String>();
private static AccessTokenCache accessTokenCache = null;
private AccessTokenCache() { }
// 静态工厂方法
public static AccessTokenCache getInstance() {
if (accessTokenCache == null) {
accessTokenCache = new AccessTokenCache();
}
return accessTokenCache;
}
public Map<String, String> getMap() {
return map;
}
public void setMap(Map<String, String> map) {
this.map = map;
}
/**
* 获取 accessToken expires_in
* @param appid 第三方用户唯一凭证
* @param appsecret 第三方用户唯一凭证密钥
* @return
*/
public Map<String,Object> getAcessTokenAndExpiresIn(String appid, String appsecret) {
Map<String,Object> result = new HashMap<String,Object>();
AccessTokenCache accessTokenCache = AccessTokenCache.getInstance();
Map<String, String> map = accessTokenCache.getMap();
String time = map.get("time");
String accessToken = map.get("access_token");
String expiresIn = map.get("expires_in");
Long nowDate = new Date().getTime();
if (accessToken != null && time != null && expiresIn!=null) {
//这里设置过期时间为微信规定的过期时间减去5分钟
int outTime = (Integer.parseInt(expiresIn)-300) * 1000;
if (nowDate - Long.parseLong(time) < outTime) {
System.out.println("-----从缓存读取access_token:" + accessToken);
//从缓存中拿数据为返回结果赋值
result.put("access_token", accessToken);
result.put("expires_in", expiresIn);
}
} else {
AccessToken info = WeiXinUtil.getAccessToken(appid, appsecret);//实际中这里要改为你自己调用微信接口去获取accessToken和expires_in
System.out.println("-----通过调用微信接口获取access_token:" + info.getAccessToken());
//将信息放置缓存中
map.put("time", nowDate + "");
map.put("access_token", info.getAccessToken());
map.put("expires_in", info.getExpiresIn()+"");
//为返回结果赋值
result.put("access_token", info.getAccessToken());
result.put("expires_in", info.getExpiresIn());
}
return result;
}
}
Three: WeiXinUtil class
/**
* Copyright (C), 2018-2020, XXX有限公司
* FileName: WeiXinUtil
* Author: zhanglei
* Date: 2020/8/11 9:31
* Description:
* History:
* <author> <time> <version> <desc>
* 作者姓名 修改时间 版本号 描述
*/
package com.asyware.game.utils;
import com.asyware.game.vo.AccessToken;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
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 java.security.SecureRandom;
/**
* 〈一句话功能简述〉<br>
* 〈〉
*
* @author zhanglei
* @create 2020/8/11
* @since 1.0.0
*/
public class WeiXinUtil {
private static Logger log = LoggerFactory.getLogger(WeiXinUtil.class);
// 获取access_token的接口地址(GET) 限2000(次/天)
public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
/**
* 获取access_token
* @param appid 凭证
* @param appsecret 密钥
* @return
*/
public static AccessToken getAccessToken(String appid, String appsecret) {
AccessToken accessToken = null;
String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
// 如果请求成功
if (null != jsonObject) {
try {
accessToken = new AccessToken();
accessToken.setAccessToken(jsonObject.getString("access_token"));
accessToken.setExpiresIn(jsonObject.getInt("expires_in"));
} catch (JSONException e) {
accessToken = null;
// 获取token失败
try {
log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
} catch (JSONException e1) {
e1.printStackTrace();
}
}
}
return accessToken;
}
/**
* 描述: 发起https请求并获取结果
* @param requestUrl 请求地址
* @param requestMethod 请求方式(GET、POST)
* @param outputStr 提交的数据
* @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
*/
public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
System.out.println(outputStr);
JSONObject jsonObject = null;
StringBuffer buffer = new StringBuffer();
try {
// 创建SSLContext对象,并使用我们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 SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
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);
// 设置请求方式(GET/POST)
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod))
httpUrlConn.connect();
// 当有数据需要提交时
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
// 注意编码格式,防止中文乱码
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 将返回的输入流转换成字符串
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();
// 释放资源
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;
}
}
Finally, post the dependencies used above, and this set of codes can be used directly without any changes.
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.2.3</version>
<classifier>jdk15</classifier><!-- jdk版本 -->
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
<exclusions>
<exclusion>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.9</version>
</dependency>