java使用HttpURLConnection 方式将userid转成openid

最新推荐文章于 2022-11-14 10:43:38 发布

Emrys02

最新推荐文章于 2022-11-14 10:43:38 发布

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分类专栏：微信文章标签：微信

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本文介绍如何通过Java代码实现微信企业号中从UserID到OpenID的转换过程，强调了JSON格式参数的重要性，并提供了完整的代码示例。

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如有问题，欢迎指正，谢谢

参数最重要，参数一定要是json格式的，自己在用其他格式一直报错找不到userid

结果如下

{"errcode":0,"errmsg":"ok","openid":"11","appid":"22"}

package com.manpower.iapplication;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class Test {
	public static void main(String[] args) throws Exception {
		String access_token = "...";
		post("https://qyapi.weixin.qq.com/cgi-bin/user/convert_to_openid?access_token="+access_token,
				"userid");
	}

	public static String post(String urlPath, String userid) throws Exception {
		// 设置参数
		String param = "{\"userid\":\"" + userid + "\",\"agentid\":\"1\"}";
		// 建立连接
		URL url = new URL(urlPath);
		HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
		httpConn.setDoOutput(true); // 需要输出
		httpConn.setDoInput(true); // 需要输入
		httpConn.setUseCaches(false); // 不允许缓存
		httpConn.setRequestMethod("POST");
		// 设置请求属性
		httpConn.setRequestProperty("Content-Type",
				"application/x-www-form-urlencoded");
		// 维持长连接
		httpConn.setRequestProperty("Connection", "Keep-Alive");
		httpConn.setRequestProperty("Charset", "UTF-8");
		// 连接,也可以不用明文connect，使用下面的httpConn.getOutputStream()会自动connect
		httpConn.connect();
		// 建立输入流，向指向的URL传入参数
		httpConn.getOutputStream().write(param.getBytes());// 输入参数

		// 获得响应状态
		int resultCode = httpConn.getResponseCode();
		if (HttpURLConnection.HTTP_OK == resultCode) {
			StringBuffer sb = new StringBuffer();
			String readLine = new String();
			BufferedReader responseReader = new BufferedReader(
					new InputStreamReader(httpConn.getInputStream(), "UTF-8"));
			while ((readLine = responseReader.readLine()) != null) {
				sb.append(readLine).append("\n");
			}
			responseReader.close();
			System.out.println(sb.toString());
			return sb.toString();
		}
		return "error";
	}

}