Java -将多个参数传递给ajax post

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class AjaxPostExample {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com/api"); // 替换为实际的API地址

            // 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/json");
            connection.setRequestProperty("Accept", "application/json");

            // 设置请求参数
            Map<String, String> parameters = new HashMap<>();
            parameters.put("param1", "value1");
            parameters.put("param2", "value2");
            parameters.put("param3", "value3");

            // 将参数转换为JSON字符串
            String jsonParameters = new Gson().toJson(parameters);

            // 启用输出流，向服务器发送请求参数
            connection.setDoOutput(true);
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(jsonParameters.getBytes());
            outputStream.flush();
            outputStream.close();

            // 获取服务器响应
            int responseCode = connection.getResponseCode();
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 处理服务器响应
            if (responseCode == HttpURLConnection.HTTP_OK) {
                System.out.println("请求成功");
                System.out.println("服务器响应：" + response.toString());
            } else {
                System.out.println("请求失败，错误代码：" + responseCode);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}