企业微信群机器人发送消息(三)java端如何控制

1.先在群里添加机器人，然后获取机器人的webhook地址：

假设webhook是：https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=693a91f6-7xxx-4bc4-97a0-0ec2sifa5aaa

2.有多种方式发送群消息，可以采用curl，也可以采用发送http请求的方式，我这里采用okhttp发送http请求，pom如下：

<!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp -->
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.14.9</version> 
        </dependency>

调用okhttp核心代码如下：

package org.jeecg.modules.quartz.job;

import okhttp3.*;
import org.jeecg.common.constant.CommonConstant;
import org.jeecg.common.system.api.ISysBaseAPI;
import org.jeecg.modules.quartz.mapper.InstrumentDataWarnJobMapper;
import org.jeecg.modules.ssta.utils.DateUtil;
import lombok.extern.slf4j.Slf4j;
import org.quartz.Job;
import java.util.*;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.beans.factory.annotation.Autowired;

import javax.annotation.Resource;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

@Slf4j
public class InstrumentDataWarnJob implements Job {

   @Autowired
   private ISysBaseAPI sysBaseAPI;
   @Resource
   InstrumentDataWarnJobMapper instrumentDataWarnJobMapper;
   private String webhook="https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=1069f91f-d5ed-46ca3-8641-eb7c1c63da5b6";

   @Override
   public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {

      log.info(new Date()+"，everyHourWarnJob，开始");

      runJob();

      //保存日志到系统日志表中
      sysBaseAPI.addLog("everyHourWarnJob-执行成功", CommonConstant.LOG_TYPE_3,2);
   }
   public void runJob()
   {

          String textTemplate = "{\n" +
               "    \"msgtype\": \"text\",\n" +
               "    \"text\": {\n" +
               "        \"content\": \" 测试文本 \",\n" +
               "        \"mentioned_list\":[\"@all\"],\n" +
               "    }\n" +
               "}";
         callWeChatBot(textTemplate);

      log.info(new Date()+"，everyHourWarnJob，执行完毕");
   }

   public String callWeChatBot(String reqBody)
   {
      log.info("请求参数：" + reqBody);

      // 构造RequestBody对象，用来携带要提交的数据；需要指定MediaType，用于描述请求/响应 body 的内容类型
      MediaType contentType = MediaType.parse("application/json; charset=utf-8");
      RequestBody body = RequestBody.create(contentType, reqBody);

      // 调用群机器人
      String respMsg = okHttp(body, webhook);

      if ("0".equals(respMsg.substring(11, 12))) {
         log.info("向群发送消息成功！");
      } else {
         log.info("请求失败！");
      }
      return respMsg;
   }
   public String okHttp(RequestBody body, String url)
   {
      String respMsg="error";
      OkHttpClient client;
      client = new OkHttpClient.Builder()
            .connectTimeout(10, TimeUnit.SECONDS) // 设置连接超时时间
            .readTimeout(20, TimeUnit.SECONDS) // 设置读取超时时间
            .build();

      // 构造Request对象
      Request request = new Request.Builder()
            .url(url)
            .post(body)
            .addHeader("cache-control", "no-cache") // 响应消息不缓存
            .build();

      // 构建Call对象，通过Call对象的execute()方法提交异步请求
      Response response = null;
      try {
         response = client.newCall(request).execute();
         // 请求结果处理
         byte[] datas = response.body().bytes();
         respMsg = new String(datas);
         log.info("返回结果：" + respMsg);
      } catch (IOException e) {
         e.printStackTrace();
      }
      return respMsg;
   }
}

3.生成核心方法的参数，

如果发送markdown格式的消息：

public static String generalBotBodyInfo(File f1, File f2, String cusenv, String myenv) {
        String content = "**信息摘要：** \n" +
                ">文件1：<font color=\\\"info\\\">" + f1.getName() + "</font>\n " +
                ">服务器路径：<font color=\\\"info\\\">" + f1.getAbsolutePath() + "</font>\n" +
                ">文件传输环境：<font color=\\\"info\\\">" + myenv + "</font>\n " +
                ">客户接受环境：<font color=\\\"info\\\">" + cusenv + "</font>\n" +
                ">时间：<font color=\\\"info\\\">" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + "</font>";

        String textTemplate = "{\n" +
                "    \"msgtype\": \"markdown\",\n" +
                "    \"markdown\": {\n" +
                "        \"content\": \"" + content + "\",\n" +
                "    }\n" +
                "}";
        return textTemplate;
    }

如果发送text格式的消息：

public static String generalBotBodyAT() {
        String textTemplate = "{\n" +
                "    \"msgtype\": \"text\",\n" +
                "    \"text\": {\n" +
                "        \"content\": \"今天下午大暴雨\",\n" +
                "        \"mentioned_list\":[\"@all\"],\n" +
                "    }\n" +
                "}";
        return textTemplate;
    }

如果发送图片，不能超过2M，支持的格式为JPG,PNG格式:

public static String generalBotBodyImage() {
        String base64 = "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";
        String md5 = "862715fb36992d6746641ff02ee85b8c";

        String textTemplate = "{\n" +
                "    \"msgtype\": \"image\",\n" +
                "    \"image\": {\n" +
                "        \"base64\": \"" + base64 + "\",\n" +
                "        \"md5\": \"" + md5 + "\"\n" +
                "    }\n" +
                "}";
        return textTemplate;
    }

发送图片需要对图片进行base64编码并计算图片的md5值，把计算的方法也一并献上，需要注意图片不要过大，不然base64编码的结果会超级长，甚至超过String的最大长度，java.util.Base64这个工具类有现成的，直接用就行

public static String getFileBase64(String path){
        try {
            FileInputStream inputStream = new FileInputStream(new File(path));
            byte [] bs = new byte[inputStream.available()];
            inputStream.read(bs);
            return Base64.getEncoder().encodeToString(bs);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }
        return null;
    }