JAVA发送钉钉自定义机器人群消息

Maven引入jar包
注意版本，较早的不行。

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.3.3</version>
        </dependency>

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 梦三国 {
    public static String WEBHOOK_TOKEN = "https://oapi.dingtalk.com/robot/send?access_token=xxxxxxxxxxxxx";

    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");

        String textMsg = "{ \"msgtype\": \"text\", \"text\": {\"content\": \"this is msg\"}}";
        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);
        }
    }
}