在Android上,使用URL编码表单数据发出POST请求,而不使用UrlEncodedFormEntity

import java.io.BufferedOutputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class PostRequestExample {
    public static void main(String[] args) {
        try {
            // 定义POST请求的URL
            URL url = new URL("http://example.com/api");

            // 创建连接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为POST
            connection.setRequestMethod("POST");

            // 设置请求头部信息
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

            // 构建请求参数
            String postData = "param1=" + URLEncoder.encode("value1", "UTF-8") +
                    "&param2=" + URLEncoder.encode("value2", "UTF-8");

            // 启用输出流
            connection.setDoOutput(true);

            // 获取输出流
            OutputStream outputStream = new BufferedOutputStream(connection.getOutputStream());

            // 将请求参数写入输出流
            outputStream.write(postData.getBytes("UTF-8"));

            // 刷新输出流
            outputStream.flush();

            // 关闭输出流
            outputStream.close();

            // 获取响应码
            int responseCode = connection.getResponseCode();

            // 处理响应结果
            if (responseCode == HttpURLConnection.HTTP_OK) {
                // 请求成功
                // TODO: 处理响应数据
            } else {
                // 请求失败
                // TODO: 处理错误情况
            }

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}