基于java使用钉钉机器人向钉钉群推送消息

 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); /** * 发送POST请求，参数是Map, contentType=x-www-form-urlencoded * * @param url * @param mapParam * @return */ public static String sendPostByMap(String url, Map mapParam) { Map headParam = new HashMap(); headParam.put("Content-type", "application/json;charset=UTF-8"); return sendPost(url, mapParam, headParam); } /** * 向指定 URL 发送POST方法的请求 * * @param url  发送请求的 URL * @param param 请求参数， * @return 所代表远程资源的响应结果 */ public static String sendPost(String url, Map param, Map headParam) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 请求头 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Fiddler"); if (headParam != null) { for (Entry entry : headParam.entrySet()) { conn.setRequestProperty(entry.getKey(), entry.getValue()); } } // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(JSON.toJSONString(param)); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { logger.info("发送 POST 请求出现异常！" + e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally { try { if (out != null) { out.close(); } if (in != null) { in.close(); } } catch (IOException ex) { ex.printStackTrace(); } } return result; } }

 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){ // 钉钉的webhook String dingDingToken="https://oapi.dingtalk.com/robot/send?access_token=0f0daca33m98gn78f00189fe1e1e908b81fa26d0d8ddd48fa78a844cd8636187"; // 请求的JSON数据，这里我用map在工具类里转成json格式 Map json=new HashMap(); Map text=new HashMap(); json.put("msgtype","text"); text.put("content","临涣焦化：VOCs排放浓度大于上限：61.89"); json.put("text",text); // 发送post请求 String response = SendHttps.sendPostByMap(dingDingToken, json); System.out.println("相应结果："+response); } }