向微信公众号发送消息

来源：互联网发布：微盘深入浅出node.js 编辑：程序博客网时间：2024/04/28 16:30

向微信公众号发送文本消息

首先说下需求，在项目中有时需要时时的知道线上系统的稳定性，防止恶意刷接口，因此就有了线上接口监控系统，时时统计接口在某个时段内调用次数。调用次数超过阀值时进行报警，即向微信公众号发送txt格式消息（接口的详情信息）

1.注册微信公众号（团队的）

注册地址 https://qy.weixin.qq.com/

API 开发文档 http://qydev.weixin.qq.com/wiki/index.php

需要绑定微信号当作管理员（添加应用、管理分组、邀请成员等）

2.实际项目中开发，通过http请求接口

2.1 创建HttpUtils

import org.apache.http.HttpEntity;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.entity.UrlEncodedFormEntity;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.client.utils.URLEncodedUtils;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.util.CollectionUtils;import org.springframework.util.StringUtils;import java.io.IOException;import java.lang.reflect.Array;import java.net.URLEncoder;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import java.util.Map;public class HttpUtils {    private static final Logger LOGGER = LoggerFactory.getLogger(HttpUtils.class);    public static String get(String url, Map<String, Object> params) {        CloseableHttpClient httpClient = HttpClients.createDefault();        //超时设置        RequestConfig requestConfig = getRequestConfig();        CloseableHttpResponse response = null;        try {            String requestParams = parseParams(params);            String extraUrl = url + (StringUtils.isEmpty(requestParams) ? "" : "?" + requestParams);            HttpGet get = new HttpGet(extraUrl);            get.setConfig(requestConfig);            response = httpClient.execute(get);            HttpEntity entity = response.getEntity();            return EntityUtils.toString(entity);        } catch (Exception e) {            LOGGER.error("访问链接异常[GET] url=" + url, e);            return null;        } finally {            if(response != null) {                try {                    response.close();                } catch (IOException e) {                    //ignore                }            }        }    }    public static String post(String url, Map<String, Object> params) {        CloseableHttpClient httpClient = HttpClients.createDefault();        RequestConfig requestConfig = getRequestConfig();        CloseableHttpResponse response = null;        try {            HttpPost post = new HttpPost(url);            post.setConfig(requestConfig);            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parsePairs(params), "UTF-8");            post.setEntity(entity);            response = httpClient.execute(post);            HttpEntity responseEntity = response.getEntity();            return EntityUtils.toString(responseEntity);        } catch (Exception e) {            LOGGER.error("访问链接异常[POST] url=" + url, e);            return null;        } finally {            if(response != null) {                try {                    response.close();                } catch (IOException e) {                    //ignore                }            }        }    }    public static String post(String url, String text) {        CloseableHttpClient httpClient = HttpClients.createDefault();        RequestConfig requestConfig = getRequestConfig();        CloseableHttpResponse response = null;        try {            HttpPost post = new HttpPost(url);            post.setConfig(requestConfig);            StringEntity entity = new StringEntity(text, "UTF-8");            post.setEntity(entity);            response = httpClient.execute(post);            HttpEntity responseEntity = response.getEntity();            return EntityUtils.toString(responseEntity);        } catch (Exception e) {            LOGGER.error("访问链接异常[POST] url=" + url, e);            return null;        } finally {            if(response != null) {                try {                    response.close();                } catch (IOException e) {                    //ignore                }            }        }    }    /**     * 设置HTTP配置     * 3秒超时     * @return     */    private static RequestConfig getRequestConfig() {        return RequestConfig.custom()                .setConnectionRequestTimeout(3000).setConnectTimeout(3000)                .setSocketTimeout(3000).build();    }    @SuppressWarnings("unchecked")    private static String parseParams(Map<String, Object> params) throws Exception{        if(CollectionUtils.isEmpty(params)) {            return "";        }        StringBuilder sb = new StringBuilder();        for (String key : params.keySet()) {            Object value = params.get(key);            if (value == null) {                continue;            }            if (value.getClass().isArray()) {                for (int i = 0; i < Array.getLength(value); i++) {                    String item = URLEncoder.encode(Array.get(value, i).toString(), "UTF-8");                    sb.append(key).append('=').append(item).append('&');                }            } else if(value instanceof List) {                List<Object> items = (List<Object>) value;                for (Object item : items) {                    String str = URLEncoder.encode(item.toString(), "UTF-8");                    sb.append(key).append('=').append(str).append('&');                }            } else {                String str = URLEncoder.encode(value.toString(), "UTF-8");                sb.append(key).append('=').append(str).append('&');            }        }        if (sb.length() > 0) {            sb.deleteCharAt(sb.length() - 1);        }        return sb.toString();    }    @SuppressWarnings("unchecked")    private static List<BasicNameValuePair> parsePairs(Map<String, Object> params) {        List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();        if(CollectionUtils.isEmpty(params)) {            return list;        }        for (String key : params.keySet()) {            Object value = params.get(key);            if (value == null) {                continue;            }            if (value.getClass().isArray()) {                for (int i = 0; i < Array.getLength(value); i++) {                    String item = Array.get(value, i).toString();                    list.add(new BasicNameValuePair(key, item));                }            } else if(value instanceof List) {                List<Object> items = (List<Object>) value;                for (Object item : items) {                    String str = item.toString();                    list.add(new BasicNameValuePair(key, str));                }            } else {                String str = value.toString();                list.add(new BasicNameValuePair(key, str));            }        }        return list;    }}

2.2 创建接口（项目中使用Spring, 写成一个服务供调用比较方便）

      MessageData  是我项目中封装的数据对象

public interface WeChatService {    WeChatSendMsgResponse sendMessage(MessageData data);}

2.3 创建实现类

import com.google.gson.reflect.TypeToken;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Value;import org.springframework.stereotype.Service;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Created by wanghaiyang on 2016/3/22. */@Servicepublic class WeChatServiceImpl implements WeChatService {    private static final Logger LOGGER = LoggerFactory.getLogger(WeChatServiceImpl.class);    private static volatile Long sendTimestamp = null;    //参数通过Spring注解读取const.properties文件赋值    @Value("${WeChat_Gettoken_Url}")    private String getTokenUrl;    @Value("${WeChat_CropID}")    private String corpid;    @Value("${WeCaht_Secret}")    private String corpsecret;    @Value("${WeChat_GetAgentList_Url}")    private String getAgentUrl;    @Value("${WeChat_SendMsg_url}")    private String sendMsgUrl;    /**     * 向公众号发送消息     *///    @Async    public WeChatSendMsgResponse sendMessage(MessageData data) {        Long now = System.currentTimeMillis();        //存在且小于一小时,则不报警        if(sendTimestamp != null && Math.abs(now - sendTimestamp) < 3600*1000) {            return null;        }        //获取access_token        String access_token = getAccessToken();        //获取agentList        List<WeChatAgent> chatAgentList = getAgentList(access_token);        LOGGER.info("[WeChatServiceImpl]发送微信消息:" + data.toString());        //发送消息        WeChatSendMsgResponse sendMsgResponse = sendMessage(data, chatAgentList, access_token);        //报警成功,记录时间戳        if("0".equals(sendMsgResponse.getErrcode())) {            sendTimestamp = System.currentTimeMillis();        }        return sendMsgResponse;    }    /**     * 获取access_token     *     * @return     */    public String getAccessToken() {        Map<String, Object> params = new HashMap<String, Object>();        params.put("corpid", corpid);        params.put("corpsecret", corpsecret);        String result = HttpUtils.get(getTokenUrl, params);        Map<String, Object> formatResult = GsonUtils.fromJson(result, new TypeToken<Map<String, Object>>() {        });        return formatResult.get("access_token").toString();    }    public List<WeChatAgent> getAgentList(String accessToken) {        Map<String, Object> params = new HashMap<String, Object>();        params.put("access_token", accessToken);        String result = HttpUtils.get(getAgentUrl, params);        WeChatGetAgentResponse response = GsonUtils.fromJson(result, WeChatGetAgentResponse.class);        List<WeChatAgent> list = response.getAgentlist();        return list;    }    public WeChatSendMsgResponse sendMessage(MessageData data, List<WeChatAgent> chatAgentList, String accessToken) {        String url = sendMsgUrl + accessToken;        //成员ID列表 特殊情况：指定为@all，则向关注该企业应用的全部成员发送        String touser = "@all";        //部门ID列表        String toparty = "1";        //标签ID列表        String totag = "";        //消息类型        String msgtype = "text";        //企业应用的id 发送到        int agentid = chatAgentList.get(0).getAgentid();        //消息内容        String text = data.toString();        //表示是否是保密消息，0表示否，1表示是，默认0        String safe = "0";        Map<String, Object> params = new HashMap<String, Object>();        Map<String, Object> textMap = new HashMap<String, Object>();        textMap.put("content", data.toString());        params.put("touser", touser);        params.put("toparty", toparty);        params.put("totag", totag);        params.put("msgtype", msgtype);        params.put("agentid", agentid);        params.put("text", textMap);        params.put("safe", safe);        String result = HttpUtils.post(url, GsonUtils.toJson(params));        WeChatSendMsgResponse response = GsonUtils.fromJson(result, WeChatSendMsgResponse.class);        return response;    }}

3.调用发送消息服务

    @Autowired    WeChatService weChatService;

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