java利用釘釘機器人向釘釘群推送消息

第一步、登錄釘釘電腦版，獲得釘釘機器人的webhook;

 

第二步，用java發送post請求給釘釘完成消息推送

package com.thinkgem.wlw.modules.lhjh.DingTalk;

import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
/**
 * @Author: zhouhe
 * @Date: 2019/6/20 14:49
 */
public class SendHttps {
    private static Logger logger = LoggerFactory.getLogger(SendHttps.class);
    /**
     * 發送POST請求，參數是Map, contentType=x-www-form-urlencoded
     *
     * @param url
     * @param mapParam
     * @return
     */
    public static String sendPostByMap(String url, Map<String, Object> mapParam) {
        Map<String, String> headParam = new HashMap();
        headParam.put("Content-type", "application/json;charset=UTF-8");
        return sendPost(url, mapParam, headParam);
    }

    /**
     * 向指定 URL 發送POST方法的請求
     *
     * @param url   發送請求的 URL
     * @param param 請求參數，
     * @return 所代表遠程資源的響應結果
     */
    public static String sendPost(String url, Map<String, Object> param, Map<String, String> headParam) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打開和URL之間的連接
            URLConnection conn = realUrl.openConnection();
            // 設置通用的請求屬性 請求頭
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Fiddler");

            if (headParam != null) {
                for (Entry<String, String> entry : headParam.entrySet()) {
                    conn.setRequestProperty(entry.getKey(), entry.getValue());
                }
            }
            // 發送POST請求必須設置如下兩行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 獲取URLConnection對象對應的輸出流
            out = new PrintWriter(conn.getOutputStream());
            // 發送請求參數
            out.print(JSON.toJSONString(param));
            // flush輸出流的緩沖
            out.flush();
            // 定義BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            logger.info("發送 POST 請求出現異常！" + e);
            e.printStackTrace();
        }
        //使用finally塊來關閉輸出流、輸入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}

第三步，編寫測試類

package com.thinkgem.wlw.modules.lhjh.DingTalk;

import java.util.HashMap;
import java.util.Map;

/**
 * @Author: zhouhe
 * @Date: 2019/6/20 14:52
 */
public class SendMessage {
    public static void main(String[] args){

        // 釘釘的webhook
        String dingDingToken="https://oapi.dingtalk.com/robot/send?access_token=0f0daca33m98gn78f00189fe1e1e908b81fa26d0d8ddd48fa78a844cd8636187";
        // 請求的JSON數據，這里我用map在工具類里轉成json格式
        Map<String,Object> json=new HashMap();
        Map<String,Object> text=new HashMap();
        json.put("msgtype","text");
        text.put("content","臨渙焦化：VOCs排放濃度大於上限：61.89");
        json.put("text",text);
        // 發送post請求
        String response = SendHttps.sendPostByMap(dingDingToken, json);
        System.out.println("相應結果："+response);

    }
}

 

測試結果如下：