Springboot开发微信公众号（三）

旧城等待， 2022-04-22 04:32 251阅读 0赞

#### Access\_token ####

一、Access\_token  
access\_token是公众号的全局唯一接口调用凭据，公众号调用各接口时都需使用access\_toke。access\_token的有效时间时2个小时，并且调用的次数是有限的，需要定时获取，并配置全局。通过访问接口的方式获取access\_token.在之后的开发中会很常见，调用接口。  
1.添加httpclient处理

<dependency>
                    <groupId>org.apache.httpcomponents</groupId>
                    <artifactId>httpclient</artifactId>
                </dependency>

2.定时获取

import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.sql.SQLException;
    
    import javax.annotation.PostConstruct;
    
    import com.google.gson.JsonObject;
    import com.google.gson.JsonParser;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.scheduling.annotation.EnableScheduling;
    import org.springframework.scheduling.annotation.Scheduled;
    import org.springframework.stereotype.Component;
    
    /**
     * @author 成小新
     * @ProjectName wechat
     * @Description: 定时器
     * @date 2018/11/13:38 PM
     * @email zhaoboy9692@163.com
     */
    @Component
    @EnableScheduling
    public class Scheduler {
    
    
        private static String access_token;
    
    	//读取appid和appsecret
        @Autowired
        private ReadApplicationUntil readApplicationUntil;
    
        private static ReadApplicationUntil readApplicationUntils;
    
        @PostConstruct
        public void init() {
            readApplicationUntils = readApplicationUntil;
        }
    
        /**
         * 定时获取access_token
         *
         * @throws SQLException
         */
        @Scheduled(fixedDelay = 100)
        public void setAccessToken() {
            String grant_type = "client_credential";
            String AppId = readApplicationUntils.getAppid();
            String secret = readApplicationUntils.getAppsecret();
            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);
                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 returnData = new JsonParser().parse(message).getAsJsonObject();
                access_token = returnData.get("access_token").getAsString();
                is.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        public String getAccessToken() {
            return access_token;
        }
    
    }

3.读取yml配置文件工具类

import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.stereotype.Component;
    
    /**
     * @author 成小新
     * @Title: ReadApplicationUNtil
     * @ProjectName wechat
     * @Description: 获取yml配置文件的属性值
     * @date 2018/10/303:36 PM
     * @email zhaoboy9692@163.com
     */
    @Component
    //接收application.yml中的wechat下面的属性
    @ConfigurationProperties(prefix = "wechat")
    public class ReadApplicationUntil {
        private String token;
        private String appid;
        private String appsecret;
    
        public String getToken() {
            return token;
        }
    
        public void setToken(String token) {
            this.token = token;
        }
    
        public String getAppid() {
            return appid;
        }
    
        public void setAppid(String appid) {
            this.appid = appid;
        }
    
        public String getAppsecret() {
            return appsecret;
        }
    
        public void setAppsecret(String appsecret) {
            this.appsecret = appsecret;
        }
    }

4.测试类

import com.xbjs.wechat.Utils.Scheduler;
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringRunner;
    
    @RunWith(SpringRunner.class)
    @SpringBootTest
    public class WechatApplicationTests {
        @Autowired
        private Scheduler scheduler;
    
    
    
    
        @Test
        public void token() {
            scheduler.setAccessToken();
            System.out.println(scheduler.getAccessToken());
            System.out.println("--------------");
    
    
        }
    
    }
    看图

![在这里插入图片描述][20181102113546213.png]  
希望能交流更多技术，关注小白的微信公众号吧。![在这里插入图片描述][20190703100512270.jpg]

[20181102113546213.png]: /images/20220422/733f764399404b9188504472f6617bd5.png
[20190703100512270.jpg]: https://img-blog.csdnimg.cn/20190703100512270.jpg