Java代碼用指定的企業微信群機器人發送消息

1.我們通過Java來向某個WebHook地址發送POST請求,並攜帶我們需要發送的消息
2.代碼示例
搭建Maven項目，在pom.xml文件里引入httpclient依賴

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.3</version>
</dependency>

以下是java代碼的實現部分

package com.demo;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class ChatbotSend {
    //企業微信群機器人的WebHook地址xxx
    public static String WEBHOOK_TOKEN = "xxx";
    
    public static void main(String args[]) throws Exception {
        HttpClient httpclient = HttpClients.createDefault();
        HttpPost httppost = new HttpPost(WEBHOOK_TOKEN);
        httppost.addHeader("Content-Type", "application/json; charset=utf-8");
        //構建一個json格式字符串textMsg，其內容是接收方需要的參數和消息內容 
        String textMsg = "{\"msgtype\":\"text\",\"text\":{\"content\":\"你好，我是機器人\"},\"at\":{\"atMobiles\":[\"xxx\"],\"isAtAll\":false}}";
        StringEntity se = new StringEntity(textMsg, "utf-8");
        httppost.setEntity(se);
        HttpResponse response = httpclient.execute(httppost);
        if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
            String result = EntityUtils.toString(response.getEntity(), "utf-8");
            System.out.println(result);
        }
    }
}

執行main方法即可發送消息