java发送x-www-form-urlencoded请求

Java发送x-www-form-urlencoded请求可以通过使用HttpURLConnection或者Apache HttpClient来实现。以下是使用HttpURLConnection的示例代码：

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class Main {
    public static void main(String[] args) {
        String url = "https://example.com/api";
        String data = "param1=value1&param2=value2";

        try {
            URL endpoint = new URL(url);
            HttpURLConnection connection = (HttpURLConnection) endpoint.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            connection.setDoInput(true);

            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

            DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
            outputStream.writeBytes(data);
            outputStream.flush();
            outputStream.close();

            // 获取响应
            int responseCode = connection.getResponseCode();
            // 处理响应数据...

            connection.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}