https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=ACCESS_TOKEN用java代码如何diaoyong

可以使用Java的HttpURLConnection或者HttpClient库来发送HTTP请求调用微信的API。

以下是使用HttpURLConnection的示例代码：

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

public class WeChatApi {
    public static void main(String[] args) {
        try {
            String accessToken = "YOUR_ACCESS_TOKEN";
            String apiUrl = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=" + accessToken;
            String postData = "YOUR_POST_DATA"; // 根据实际情况填写请求参数

            URL url = new URL(apiUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            connection.setRequestProperty("Content-Type", "application/json");

            // 发送POST请求
            connection.getOutputStream().write(postData.getBytes("UTF-8"));

            // 读取响应数据
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 输出响应数据
            System.out.println(response.toString());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

需要替换掉`YOUR_ACCESS_TOKEN`和`YOUR_POST_DATA`为实际的值。其中，`YOUR_POST_DATA`是根据微信API文档中的要求构造的POST请求参数，需要根据实际情况填写。