企业微信官网服务API地址：https://work.weixin.qq.com/api/doc/90001/90143/91201

1、注册企业微信
获取企业ID：在注册后：我的企业最下面


2、在应用管理

中创建应用

然后进入应用获取：应用id（agentID）和管理组的凭证秘钥【CorpSecret】=Secret

依赖：

<dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.8.2</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.2</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.5</version></dependency>

用到的UrlData类和WeChatData

 import org.springframework.stereotype.Component;@Componentpublic class UrlData {//应用组织编号(企业ID) corpsecret应用秘钥String corpid; // corpsecret应用秘钥管理组的凭证秘钥【CorpSecret】 用的 企业号/团队号 SecretString corpsecret;//获取ToKen的请求String Get_Token_Url;//发送消息的请求String SendMessage_Url;public String getCorpid() {return corpid;}public void setCorpid(String corpid) {this.corpid = corpid;}public String getCorpsecret() {return corpsecret;}public void setCorpsecret(String corpsecret) {this.corpsecret = corpsecret;}public void setGet_Token_Url(String corpid,String corpsecret) {this.Get_Token_Url ="https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid="+corpid+"&corpsecret="+corpsecret;}public String getGet_Token_Url() {return Get_Token_Url;}public String getSendMessage_Url(){SendMessage_Url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=";return SendMessage_Url;}@Overridepublic String toString() {return "UrlData{" +"corpid='" + corpid + '\'' +", corpsecret='" + corpsecret + '\'' +", Get_Token_Url='" + Get_Token_Url + '\'' +", SendMessage_Url='" + SendMessage_Url + '\'' +'}';}}

WeChatData 类

import org.springframework.stereotype.Component;@Componentpublic class WeChatData {//“微信消息发送”的post数据对象文件//发送微信消息的URL//String sendMsgUrl="https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=";//成员账号String touser;//消息类型String msgtype;//企业应用的agentIDint agentid;//实际接收Map类型数据Object text;public Object getText() {return text;}public void setText(Object text) {this.text = text;}public String getMsgtype() {return msgtype;}public void setMsgtype(String msgtype) {this.msgtype = msgtype;}public int getAgentid() {return agentid;}public void setAgentid(int agentid) {this.agentid = agentid;}public String getTouser() {return touser;}public void setTouser(String touser) {this.touser = touser;}}

get请求信息（请求地址可以参考官网）

import java.io.IOException;import java.text.SimpleDateFormat;import java.util.HashMap;import java.util.Map;import java.util.Set;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import com.bigdata.bean.UrlData;import com.bigdata.bean.WeChatData;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.slf4j.LoggerFactory;import com.google.gson.Gson;import com.google.gson.reflect.TypeToken;import org.springframework.stereotype.Component;@Componentpublic class Send_weChatMsg<controller> {//“发送微信实体”代码private CloseableHttpClient httpClient;private HttpPost httpPost;//用于提交登陆数据private HttpGet httpGet;//用于获得登录后的页面public static final String CONTENT_TYPE = "Content-Type";SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//private static Gson gson = new Gson();/** * 微信授权请求，GET类型，获取授权响应，用于其他方法截取token * @param Get_Token_Url * @return String 授权响应内容 * @throws IOException */protected String toAuth(String Get_Token_Url) throws IOException {httpClient = HttpClients.createDefault();httpGet = new HttpGet(Get_Token_Url);CloseableHttpResponse response = httpClient.execute(httpGet);String resp;try {HttpEntity entity = response.getEntity();resp = EntityUtils.toString(entity, "utf-8");EntityUtils.consume(entity);} finally {response.close();}LoggerFactory.getLogger(getClass()).info(" resp:{}", resp);return resp;}/** * 获取toAuth(String Get_Token_Url)返回结果中键值对中access_token键的值 * @param */public String getToken(String corpid,String corpsecret) throws IOException {Send_weChatMsg sw = new Send_weChatMsg();UrlData uData = new UrlData();uData.setGet_Token_Url(corpid,corpsecret);String resp = sw.toAuth(uData.getGet_Token_Url());Map<String, Object> map = gson.fromJson(resp,new TypeToken<Map<String, Object>>() {}.getType());return map.get("access_token").toString();}public String createpostdata(String touser, String msgtype,int application_id, String contentKey ,String contentValue) {WeChatData wcd = new WeChatData();wcd.setTouser(touser);wcd.setAgentid(application_id);wcd.setMsgtype(msgtype);Map<Object, Object> content = new HashMap<Object, Object>();content.put(contentKey,contentValue+"\n");wcd.setText(content);return gson.toJson(wcd);}public String post(String charset, String contentType, String url, String data,String token) throws IOException {CloseableHttpClient httpclient = HttpClients.createDefault();httpPost = new HttpPost(url+token);httpPost.setHeader(CONTENT_TYPE, contentType);httpPost.setEntity(new StringEntity(data, charset));CloseableHttpResponse response = httpclient.execute(httpPost);String resp;try {HttpEntity entity = response.getEntity();resp = EntityUtils.toString(entity, charset);EntityUtils.consume(entity);} finally {response.close();}LoggerFactory.getLogger(getClass()).info("call [{}], param:{}, resp:{}", url, data, resp);return resp;}//获取部门员工public Set<String> getDepartmentData(String access_token,int department_id,int fetch_child) throws IOException {String Url="https://qyapi.weixin.qq.com/cgi-bin/user/simplelist?access_token="+access_token+"&department_id="+department_id+"&fetch_child="+fetch_child;httpClient = HttpClients.createDefault();httpGet = new HttpGet(Url);CloseableHttpResponse response = httpClient.execute(httpGet);String resp;try {HttpEntity entity = response.getEntity();resp = EntityUtils.toString(entity, "utf-8");EntityUtils.consume(entity);} finally {response.close();}LoggerFactory.getLogger(getClass()).info(" resp:{}", resp);JSONObject jsonObject = JSONObject.parseObject(resp);JSONArray userlist = jsonObject.getJSONArray("userlist");HashMap<String, Integer> map = new HashMap<String, Integer>();//遍历jsonarray 数组if(userlist.size()>0){for(int i=0;i<userlist.size();i++){JSONObject jsonObject1 = userlist.getJSONObject(i);String userid = jsonObject1.get("userid").toString();map.put(userid,1);}}Set<String> useridkey = map.keySet();System.out.println(useridkey);return useridkey;}//获取企业微信标签下的成员public Set<String> getTagsData(String access_token,int tags_id) throws IOException {String Url="https://qyapi.weixin.qq.com/cgi-bin/tag/get?access_token="+access_token+"&tagid="+tags_id;httpClient = HttpClients.createDefault();httpGet = new HttpGet(Url);CloseableHttpResponse response = httpClient.execute(httpGet);String resp;try {HttpEntity entity = response.getEntity();resp = EntityUtils.toString(entity, "utf-8");EntityUtils.consume(entity);} finally {response.close();}LoggerFactory.getLogger(getClass()).info(" resp:{}", resp);JSONObject jsonObject = JSONObject.parseObject(resp);JSONArray userlist = jsonObject.getJSONArray("userlist");HashMap<String, Integer> map = new HashMap<String, Integer>();//遍历jsonarray 数组if(userlist.size()>0){for(int i=0;i<userlist.size();i++){JSONObject jsonObject1 = userlist.getJSONObject(i);String userid = jsonObject1.get("userid").toString();map.put(userid,1);}}Set<String> useridkey = map.keySet();System.out.println(useridkey);return useridkey;}}

上面是获取token的方法和get请求，然后获取成员，下面是发送消息（文本格式的），群发和单独发送

 //传入文本格式的直接发送消息，这个是发送给部门所有人 ，这里部门ID 写死了public void send_MsgDepartment(String Msg){Send_weChatMsg sw = new Send_weChatMsg();try { String agentId = Property.getProperty("AgentId");String token = sw.getToken(Property.getProperty("CorpID"),Property.getProperty("Secret"));Set<String> departmentData = sw.getDepartmentData(token, 1, 0);for (String departmentDatum : departmentData) {String name=departmentDatum;String postdata = sw.createpostdata(name, "text", Integer.parseInt(agentId), "content",Msg);String resp = sw.post("utf-8", Send_weChatMsg.CONTENT_TYPE,(new UrlData()).getSendMessage_Url(), postdata, token);}} catch (IOException e) {e.printStackTrace();}}//单独输入信息发送,这个是发送给人（配置文件里面配置的人员）public void send_Msgpersonnel(String Information){Send_weChatMsg sw = new Send_weChatMsg();try { String agentId = Property.getProperty("AgentId");String token = sw.getToken(Property.getProperty("CorpID"),Property.getProperty("Secret"));String userName = Property.getProperty("UserName");String[] split = userName.split(",");for (int i=0;i<split.length ;i++ ){String name = split[i];String postdata = sw.createpostdata(name, "text", Integer.parseInt(agentId), "content",Information);String resp = sw.post("utf-8", Send_weChatMsg.CONTENT_TYPE,(new UrlData()).getSendMessage_Url(), postdata, token);}} catch (IOException e) {e.printStackTrace();}}//发给标签下的人员 ，标签见配置文件public void send_MsgTags(String Msg){Send_weChatMsg sw = new Send_weChatMsg();try {String agentId = Property.getProperty("AgentId");String token = sw.getToken(Property.getProperty("CorpID"),Property.getProperty("Secret"));String tags = Property.getProperty("Tags");//System.out.println(token);Set<String> tagsData = sw.getTagsData(token, Integer.parseInt(tags));for (String departmentDatum : tagsData) {String name=departmentDatum;String postdata = sw.createpostdata(name, "text", Integer.parseInt(agentId), "content",Msg);String resp = sw.post("utf-8", Send_weChatMsg.CONTENT_TYPE,(new UrlData()).getSendMessage_Url(), postdata, token);}} catch (IOException e) {e.printStackTrace();}}

以上是完整版的java对企业微信发送消息

如果需要发送图片可以借鉴：https://blog.csdn.net/ruren1/article/details/89374478
https://www.cnblogs.com/shirui/p/7405944.html