java访问微信接口发送消息

最近在开发activiti流程的时候有个需求：流程到达每个审批节点后，需要向该节点的审批人发送一个消息，提示有审批需要处理。

参考了一下微信的开发者文档和网络上的一些技术博客，现在记录一下。以便后续继续研究微信开发。【微信开发真的很好玩的】

首先，你需要注册一个企业微信账号：https://work.weixin.qq.com/wework_admin/register_wx?from=myhome

 然后进入后台管理，创建一个应用

上面标红的信息，都是开发测试需要用到的，需要记录一下。

先贴代码：

WeChatData.java

package com.xfma.wx.test;

/**
 * 微信消息发送实体类
 * @author PC-MXF
 *
 */
public class WeChatData {
	 //发送微信消息的URLString sendMsgUrl="https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=";
	/**
	 * 成员账号
	 */
	private String touser;
	
	/**
	 * 消息类型
	 */
	private String msgtype;
	
	/**
	 * 企业用用的agentid
	 */
	private String agentid;
	
	/**
	 * 十几接收map类型数据
	 */
	private Object text;

	public String getTouser() {
		return touser;
	}

	public void setTouser(String touser) {
		this.touser = touser;
	}

	public String getMsgtype() {
		return msgtype;
	}

	public void setMsgtype(String msgtype) {
		this.msgtype = msgtype;
	}

	public String getAgentid() {
		return agentid;
	}

	public void setAgentid(String agentid) {
		this.agentid = agentid;
	}

	public Object getText() {
		return text;
	}

	public void setText(Object text) {
		this.text = text;
	}
	
	
}

　　WeChatUrlData.java

package com.xfma.wx.test;

/**
 * 微信授权请求
 * @author PC-MXF
 *
 */
public class WeChatUrlData {

	 /**
	  *  企业Id
     */
	private String corpid;
	
	 /**
     * secret管理组的凭证密钥
     */
	private String corpsecret;
	
	 /**
	  * 获取ToKen的请求
     */
	private String Get_Token_Url;
	
	 /**
	  * 发送消息的请求
     */
	private 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 String getGet_Token_Url() {
		return Get_Token_Url;
	}

	public void setGet_Token_Url(String corpid,String corpsecret) {
		Get_Token_Url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid="+corpid+"&corpsecret="+corpsecret;
	}

	public String getSendMessage_Url() {
		 SendMessage_Url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=";
		return SendMessage_Url;
	}

	public void setSendMessage_Url(String sendMessage_Url) {
		SendMessage_Url = sendMessage_Url;
	}
	
	
}

　　WeChatMsgSend.java

package com.xfma.wx.test;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;

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;

/**
 * 微信发送消息
 * 
 * @author PC-MXF
 *
 */
public class WeChatMsgSend {

	private CloseableHttpClient httpClient;

	/**
	 * 用于提交登录数据
	 */
	private HttpPost httpPost;

	/**
	 * 用于获得登陆后页面
	 */
	private HttpGet httpGet;

	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);
		} catch (Exception e) {
			e.getStackTrace();
		} finally {
			response.close();
		}
		LoggerFactory.getLogger(getClass()).info(" resp:{}", resp);
		return resp;
	}

	/**
	 * corpid应用组织编号 corpsecret应用秘钥 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 {
		WeChatMsgSend sw = new WeChatMsgSend();
		WeChatUrlData uData = new WeChatUrlData();
		uData.setGet_Token_Url(corpid, corpsecret);
		String resp = sw.toAuth(uData.getGet_Token_Url());
		System.out.println("resp=====:" + resp);
		try {
			Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>() {
			}.getType());
			return map.get("access_token").toString();
		} catch (Exception e) {
			e.getStackTrace();
			return resp;
		}
	}

	/**
	 * 创建微信发送请求post数据 touser发送消息接收者 ，msgtype消息类型（文本/图片等）， application_id应用编号。
	 * 本方法适用于text型微信消息，contentKey和contentValue只能组一对
	 * 
	 * @param touser
	 * @param msgtype
	 * @param application_id
	 * @param contentKey
	 * @param contentValue
	 * @return
	 */
	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);
		wcd.setText(content);
		return gson.toJson(wcd);
	}

	/**
	 * @Title  创建微信发送请求post实体，charset消息编码    ，contentType消息体内容类型，
	 * url微信消息发送请求地址，data为post数据，token鉴权token
	 * @param charset
	 * @param contentType
	 * @param url
	 * @param data
	 * @param token
	 * @return
	 * @throws IOException
	 */
	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;
	}
}

　　Test.java

package com.xfma.wx.test;

public class Test {

	public static void main(String[] args) {
		WeChatMsgSend swx = new WeChatMsgSend();
		try {
			String token = swx.getToken("ww44a4ede4d3626a","w6tRMGfN5WSFarMmqdpkwBztPRy-HVXRRs76QXvFU");
			String postdata = swx.createpostdata("jiangpin", "text", 1000009, "content","这是一条测试信息");
			String resp = swx.post("utf-8", WeChatMsgSend.CONTENT_TYPE,(new WeChatUrlData()).getSendMessage_Url(), postdata, token);
			System.out.println("获取到的token======>" + token);
			System.out.println("请求数据======>" + postdata);
			 System.out.println("发送微信的响应数据======>" + resp);
		}catch (Exception e) {
			e.getStackTrace();
		}
	}
}