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微信公众号开发之Access token+redis存储token(三)

自定义菜单需要获取Access token

公众号使用AppID和AppSecret调用接口来获取access_token
公众号和小程序均可以使用AppID和AppSecret调用本接口来获取access_token。AppID和AppSecret可在“微信公众平台-开发-基本配置”页中获得

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_token。开发者需要进行妥善保存。access_token的存储至少要保留512个字符空间。access_token的有效期目前为2个小时,需定时刷新,重复获取将导致上次获取的access_token失效。

access_token的有效期是7200秒(两小时),在有效期内,可以一直使用,只有当access_token过期时,才需要再次调用接口 获取access_token。在理想情况下,一个7x24小时运行的系统,每天只需要获取12次access_token,即每2小时获取一次。如果在 有效期内,再次获取access_token,那么上一次获取的access_token将失效。
目前,获取access_token接口的调用频率限制为2000次/天,如果每次发送客服消息、获取用户信息、群发消息之前都要先调用获取 access_token接口得到接口访问凭证,这显然是不合理的,一方面会更耗时(多了一次接口调用操作),另一方面2000次/天的调用限制恐怕也不 够用。因此,在实际应用中,我们需要将获取到的access_token存储起来,然后定期调用access_token接口更新它,以保证随时取出的 access_token都是有效的。

原文链接

先看完成的例子

接口调用请求说明

https请求方式: GET https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET

参数说明

参数 说明
grant_type 获取access_token填写client_credential
appid 第三方用户唯一凭证
secret 第三方用户唯一凭证密钥,即appsecret

返回说明

正常情况下,微信会返回下述JSON数据包给公众号:

{"access_token":"ACCESS_TOKEN","expires_in":7200}
参数说明

参数 说明
access_token 获取到的凭证
expires_in 凭证有效时间,单位:秒

封装这两个参数

package com.rzk.pojo;

import lombok.Data;

@Data
public class Token {
    private String accessToken;
    private int expiresIn;
}

HttpConstant

package com.rzk.util;
public class HttpConstant {

    //获取Access token URI
    public static String API_URI = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
}

HttpClient 工具类

package com.rzk.util;

import com.rzk.pojo.Token;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class HttpClient {

    /**
     * GET请求
     * @param url
     * @return
     */
    public static String doGetRequest(String url) {
        String result = "";
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = null;
        try {
            response = httpClient.execute(httpGet);
            HttpEntity responseEntity = response.getEntity();
            result = EntityUtils.toString(responseEntity);
        } catch (Exception e) {
            e.printStackTrace();
        }  finally {
            try {
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }return result;
    }
}

WxServerController

    @GetMapping(value = "accessToken")
    public String AccessToken(){
        Token token = new Token();
        //使用httpclient请求
        String result = HttpClient.doGetRequest(HttpConstant.API_URI.replace("APPID", environment.getProperty("wx.appid")).replace("APPSECRET", environment.getProperty("wx.secret")));
        //转成json对象
        JSONObject json = JSON.parseObject(result);
        token.setAccessToken(String.valueOf(json.get("access_token")));

        return token.getAccessToken();
    }

请求accessToken

还要去公众号基础设置开启白名单访问列表,填上你的服务器ip地址即可

整合redis存储accessToken

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.rzk</groupId>
    <artifactId>wxserver</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>wxserver</name>
    <description>wxserver</description>
    <properties>
        <java.version>1.8</java.version>
        <httpclient.version>4.5.13</httpclient.version>
        <fastjson.version>1.2.76</fastjson.version>
        <commons-lang.version>2.6</commons-lang.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--httpclient -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>${httpclient.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
        <!--redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>${commons-lang.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

application.yml配置文件

配置文件


spring:
  redis:
    #超过时间
    timeout: 10000ms
    #地址
    host: ip
    #端口
    port: 6382
    #数据库
    database: 0
    password: 密码
    lettuce:
      pool:
        #最大连接数 默认8
        max-active: 1024
        # 最大连接阻塞等待时间,默认-1
        max-wait: 10000ms
        #最大空闲连接
        max-idle: 200
        #最小空闲连接
        min-idle: 5
    #哨兵模式
    sentinel:
      #主节点名称
      master: mymaster
      #节点
      nodes: ip:26381,ip:26382,ip:26383

Controller


    @GetMapping(value = "accessToken")
    public String getAccessToken(){
        Token token = new Token();
        //如果不等于空 或者小于600秒
        if (redisTemplate.getExpire("expires_in")<600||redisTemplate.getExpire("expires_in")==null){

            //使用httpclient请求
            String result = HttpClient.doGetRequest(HttpConstant.API_URI.replace("APPID", environment.getProperty("wx.appid")).replace("APPSECRET", environment.getProperty("wx.secret")));

            //转成json对象
            JSONObject json = JSON.parseObject(result);
            System.out.println(json);
            token.setAccessToken(String.valueOf(json.get("access_token")));
            token.setExpiresIn((Integer) json.get("expires_in"));
            System.out.println(json.get("expires_in"));
            System.out.println(token.getExpiresIn());
            redisTemplate.opsForValue().set("accessToken",json.get("access_token"));
            redisTemplate.opsForValue().set("expiresIn",json.get("expires_in"),7200, TimeUnit.SECONDS);
        }
        String accessToken = redisTemplate.opsForValue().get("accessToken").toString();
        Long expiresIn = redisTemplate.getExpire("expiresIn");
        logger.info("accessToken{}:"+accessToken);
        logger.info("expiresIn{}:"+expiresIn);

        return token.getAccessToken();
    }

我使用redis流程

后续可用springboot自带的定时任务处理器去开启定时任务功能
这里就不贴定时任务的代码了

posted @ 2022-01-15 11:48  Rzk  阅读(2115)  评论(0编辑  收藏  举报