微信公众号发送模板消息

1.创建模板，拿到模板ID

2.创建发送消息工具类

import cn.hutool.http.HttpUtil;import com.alibaba.fastjson.JSONObject;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Value;import org.ponent;import java.util.HashMap;import java.util.List;import java.util.Map;@Componentpublic class WeixinUtil {private static Logger logger = LoggerFactory.getLogger(WeixinUtil.class);private static final String WEIXIN_PREFIX = "https://api./cgi-bin";@Value("${wx.appID}")private String appID;@Value("${wx.secret}")private String secret;@Value("${wx.domainName}")private String domainName;private static String PARAM_ACCESS_TOKEN = "";private static long TOKEN_START = 0;private static int expiresIn = 7200;/*** 做一个缓存的access_token*/private String getAccessToken() {if (TOKEN_START == 0) {PARAM_ACCESS_TOKEN = getNormalAccessToken();TOKEN_START = System.currentTimeMillis();} else if (System.currentTimeMillis() - TOKEN_START > expiresIn) {PARAM_ACCESS_TOKEN = getNormalAccessToken();TOKEN_START = System.currentTimeMillis();}return PARAM_ACCESS_TOKEN;}/*** 发送信息** @param params*/private void sendInfo(String params) {String url = WEIXIN_PREFIX + "/message/template/send?access_token=" + getAccessToken();String result = HttpUtil.post(url, params);logger.info(">>>发送消息:" + result);System.out.println(">>>发送消息:" + result);}private static String getNormalAccessTokenURL() {return WEIXIN_PREFIX + "/token";}/*** 获取普通的AccessToken*/private String getNormalAccessToken() {Map<String, Object> map = new HashMap<>();map.put("grant_type", "client_credential");map.put("appid", appID);map.put("secret", secret);String result = HttpUtil.get(getNormalAccessTokenURL(), map);if (result != null) {JSONObject jsonObject = JSONObject.parseObject(result);PARAM_ACCESS_TOKEN = jsonObject.getString("access_token");expiresIn = jsonObject.getInteger("expires_in");}return PARAM_ACCESS_TOKEN;}public void sendMessage(String toUser, String templateID, String subURL, String first,List<String> keywordList, String remark) {MessageEntity messageEntity = new MessageEntity();messageEntity.setTouser(toUser);messageEntity.setTemplate_id(templateID);messageEntity.setUrl(domainName + subURL);messageEntity.setData(getMapData(first, keywordList, remark));sendInfo(messageEntity.toString());}private static Map<String, Map<String, String>> getMapData(String f1, List<String> keywordList, String rmk) {Map<String, Map<String, String>> data = new HashMap<>(5);Map<String, String> first = new HashMap<>(2);first.put("color", "#173177");first.put("value", f1);for (int i = 1; i <= keywordList.size(); i++) {Map<String, String> subMap = new HashMap<>(2);subMap.put("color", "#173177");subMap.put("value", keywordList.get(i - 1));data.put("keyword" + i, subMap);}Map<String, String> remark = new HashMap<>(2);remark.put("color", "#173177");remark.put("value", rmk);data.put("first", first);data.put("remark", remark);return data;}/*** 获取关注当前公共号人数,还可以获取光柱公众号的openid列表** @return*/public int getConcernedPeople() {String url = WEIXIN_PREFIX + "/user/get?access_token=" + getAccessToken();try {String result = HttpUtil.get(url);if (result != null) {JSONObject jsonObject = JSONObject.parseObject(result);return (int) jsonObject.get("total");}} catch (Exception e) {logger.error(e.getMessage());return 0;}return 0;}}

/*** 消息的发送需要json格式*/class MessageEntity {private String touser;private String template_id;private String url;private Map<String, Map<String, String>> data;public String getTouser() {return touser;}public void setTouser(String touser) {this.touser = touser;}public String getTemplate_id() {return template_id;}public void setTemplate_id(String template_id) {this.template_id = template_id;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public Map<String, Map<String, String>> getData() {return data;}public void setData(Map<String, Map<String, String>> data) {this.data = data;}@Overridepublic String toString() {return JSONObject.toJSONString(this);}}

在springboot中可以直接使用。其中appID和secret是微信公众号基础信息，domainName是网站域名（如果域名修改便于改动，也利于测试和生成环境部署）

用户点击消息查看详情，如果网址是/a/p/123.html,这时候domainName就可以设置为，如果后期域名改动或者测试生成环境切换，都可以通过配置文件进行修改，比较简单方便。

3.构建发送的信息并发送

// 微信通知：先获取WeixinUtil对象，然后组织发送消息的信息String openid="openid";String templateID="templateID";String subURL = "/wx.html/p/detail?id=109&number=1591953944402";String first = "您的请假已被驳回";String remark = "备注消息";List<String> keywordList = new ArrayList<>(2);keywordList.add("已驳回");keywordList.add("请假时间过长");weixinUtil.sendMessage(openid, templateID, subURL, first, keywordList, remark);