java $.ajax

在Java中，没有直接对应于JavaScript中的$.ajax方法。$.ajax是jQuery库中用于发送异步HTTP请求的方法。在Java中，可以使用Java的HttpURLConnection类或者第三方库如Apache HttpClient来发送HTTP请求。

以下是使用HttpURLConnection发送GET请求的示例代码：

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

public class Main {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://example.com/api");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String line;
                StringBuilder response = new StringBuilder();
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();

                System.out.println(response.toString());
            } else {
                System.out.println("HTTP request failed with response code: " + responseCode);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

以上代码使用HttpURLConnection发送GET请求，并打印出响应内容。你可以根据需要修改请求的URL和请求方法。