java企业微信消息发送工具类

基于java实现调用企业微信发送消息，文件，图片。

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

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.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSONObject;


public class WechatUtil {

	public static final String CHAR_SET = "utf-8";
	public static final String TOKEN_API = "https://qyapi.weixin.qq.com/cgi-bin/gettoken";
	public static final String MSG_SEND_API = "https://qyapi.weixin.qq.com/cgi-bin/message/send";
	public static final String MEDIA_UPLOAD_API = "https://qyapi.weixin.qq.com/cgi-bin/media/upload";
	
	private CloseableHttpClient httpClient;
	private HttpPost httpPost;
	private HttpGet httpGet;

	private static Logger log = LoggerFactory.getLogger(WechatUtil.class);

	
	public String getToken(String corpid, String corpsecret) throws IOException {
		httpClient = HttpClients.createDefault();
		httpGet = new HttpGet(TOKEN_API + "?corpid=" + corpid + "&corpsecret=" + corpsecret);
		CloseableHttpResponse res = httpClient.execute(httpGet);
		String resString = "";

		try {
			HttpEntity entity = res.getEntity();
			resString = EntityUtils.toString(entity, "utf-8");
			EntityUtils.consume(entity);

			JSONObject jo = JSONObject.parseObject(resString);
			return jo.getString("access_token");
		} catch (Exception e) {
			log.error(e.getMessage());
		} finally {
			res.close();
		}
		log.debug("resp:{}", resString);
		return resString;
	}

	
	public String sendMsg(String data, String token) throws IOException {
		httpClient = HttpClients.createDefault();
		httpPost = new HttpPost(MSG_SEND_API + "?access_token=" + token);
		httpPost.setEntity(new StringEntity(data, CHAR_SET));
		CloseableHttpResponse res = httpClient.execute(httpPost);
		String resString;
		try {
			HttpEntity entity = res.getEntity();
			resString = EntityUtils.toString(entity, CHAR_SET);
			EntityUtils.consume(entity);
		} finally {
			res.close();
		}
		log.debug("call [{}], param:{}, res:{}", MSG_SEND_API, data, resString);
		return resString;
	}

	
	public String createTextData(String touser, int agentid, String content) {
		Map data = new HashMap();
		Map text = new HashMap();
		data.put("touser", touser);
		data.put("msgtype", "text");
		data.put("agentid", agentid);
		text.put("content", content);
		data.put("text", text);
		return JSONObject.toJSONString(data);
	}

	
	public String createFileData(String touser, int agentid, String media_id) {
		Map data = new HashMap();
		Map file = new HashMap();
		data.put("touser", touser);
		data.put("msgtype", "file");
		data.put("agentid", agentid);
		file.put("media_id", media_id);
		data.put("file", file);

		return JSONObject.toJSONString(data);
	}

	
	public String createImageData(String touser, int agentid, String media_id) {
		Map data = new HashMap();
		Map image = new HashMap();
		data.put("touser", touser);
		data.put("msgtype", "image");
		data.put("agentid", agentid);
		image.put("media_id", media_id);
		data.put("image", image);

		return JSONObject.toJSONString(data);
	}

	
	public String upload(String fileType, String filePath, String token) throws Exception {
		// 返回结果
		String result = null;
		File file = new File(filePath);
		if (!file.exists() || !file.isFile()) {
			throw new IOException("文件不存在");
		}

		String uploadUrl = MEDIA_UPLOAD_API + "?access_token=" + token + "&type=" + fileType;
		URL url = new URL(uploadUrl);
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.setRequestMethod("POST");// 以POST方式提交表单
		conn.setDoInput(true);
		conn.setDoOutput(true);
		conn.setUseCaches(false);// POST方式不能使用缓存
		// 设置请求头信息
		conn.setRequestProperty("Connection", "Keep-Alive");
		conn.setRequestProperty("Charset", "UTF-8");
		// 设置边界
		String BOUNDARY = "----------" + System.currentTimeMillis();
		conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
		// 请求正文信息
		// 第一部分
		StringBuilder sb = new StringBuilder();
		sb.append("--");// 必须多两条道
		sb.append(BOUNDARY);
		sb.append("rn");
		sb.append("Content-Disposition: form-data;name="media"; filename="" + file.getName() + ""rn");
		sb.append("Content-Type:application/octet-streamrnrn");

		// 获得输出流
		OutputStream out = new DataOutputStream(conn.getOutputStream());
		// 输出表头
		out.write(sb.toString().getBytes("UTF-8"));
		// 文件正文部分
		// 把文件以流的方式 推送道URL中
		DataInputStream din = new DataInputStream(new FileInputStream(file));
		int bytes = 0;
		byte[] buffer = new byte[1024];
		while ((bytes = din.read(buffer)) != -1) {
			out.write(buffer, 0, bytes);
		}
		din.close();
		// 结尾部分
		byte[] foot = ("rn--" + BOUNDARY + "--rn").getBytes("UTF-8");// 定义数据最后分割线
		out.write(foot);
		out.flush();
		out.close();
		if (HttpsURLConnection.HTTP_OK == conn.getResponseCode()) {

			StringBuffer strbuffer = null;
			BufferedReader reader = null;
			try {
				strbuffer = new StringBuffer();
				reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
				String lineString = null;
				while ((lineString = reader.readLine()) != null) {
					strbuffer.append(lineString);
				}
				if (result == null) {
					result = strbuffer.toString();
				}
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				if (reader != null) {
					reader.close();
				}
			}
		}
		JSONObject jsonObject = JSONObject.parseObject(result);
		return jsonObject.getString("media_id");
	}
}

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class WechatTest {

	private static Logger log = LoggerFactory.getLogger(WechatTest.class);
	// 企业ID
	private static String corpid = "*****";
	// 应用的凭证密钥
	private static String corpsecret = "*****-*****";
	// 消息接收人
	private static String touser = "Zhang3";
	// 企业应用的id
	private static int agentid = 1000003;

	public static void main(String[] args) {
		WechatTest wx = new WechatTest();
		wx.sendText("测试发送企业微信消息@java");
		wx.sendFile("d:\security.log");
		wx.sendImage("d:\瓢虫.png");
	}

	
	public void sendText(String content) {
		WechatUtil wx = new WechatUtil();
		try {
			String token = wx.getToken(corpid, corpsecret);
			String data = wx.createTextData(touser, agentid, content);
			String res = wx.sendMsg(data, token);
			log.info("token >>>" + token);
			log.info("data  >>>" + data);
			log.info("res   >>>" + res);
		} catch (Exception e) {
			e.getStackTrace();
		}
	}

	
	public void sendFile(String filePath) {
		WechatUtil wx = new WechatUtil();
		try {
			String token = wx.getToken(corpid, corpsecret);
			String media_id = wx.upload("file", filePath, token);
			String data = wx.createFileData(touser, agentid, media_id);
			String res = wx.sendMsg(data, token);
			log.info("token >>>" + token);
			log.info("data  >>>" + data);
			log.info("res   >>>" + res);
		} catch (Exception e) {
			e.getStackTrace();
		}
	}

	
	public void sendImage(String filePath) {
		WechatUtil wx = new WechatUtil();
		try {
			String token = wx.getToken(corpid, corpsecret);
			String media_id = wx.upload("image", filePath, token);
			String data = wx.createImageData(touser, agentid, media_id);
			String res = wx.sendMsg(data, token);
			log.info("token >>>" + token);
			log.info("data  >>>" + data);
			log.info("res   >>>" + res);
		} catch (Exception e) {
			e.getStackTrace();
		}
	}
}

			org.apache.httpcomponents
			httpclient
			4.5.2
		

		
			org.apache.httpcomponents
			httpcore
			4.4.5
		

		
		
			org.slf4j
			slf4j-api
			1.7.25
		
		
		
			org.slf4j
			slf4j-log4j12
			1.7.25
			
		

		
			com.alibaba
			fastjson
			1.2.4