java如何发送get请求

Java可以使用HttpURLConnection或者HttpClient发送GET请求。其中HttpURLConnection是Java自带的API，HttpClient需要导入第三方库。以下是使用HttpURLConnection发送GET请求的示例代码：

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

public class HttpGetRequest {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://www.example.com/api/getData");
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            con.setRequestMethod("GET");
            int status = con.getResponseCode();
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer content = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                content.append(inputLine);
            }
            in.close();
            con.disconnect();
            System.out.println(content.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}