java 实现get请求 url传参

可以使用java中的HttpURLConnection或者HttpClient来实现get请求，同时可以通过URL传递参数。

使用HttpURLConnection实现：

import java.net.*;
import java.io.*;

public class HttpGetRequest {
    public static void main(String[] args) {
        try {
            String urlStr = "http://example.com/api?param1=value1&param2=value2";
            URL url = new URL(urlStr);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("Accept", "application/json");

            if (conn.getResponseCode() != 200) {
                throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
            }

            BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));

            String output;
            System.out.println("Output from Server .... \n");
            while ((output = br.readLine()) != null) {
                System.out.println(output);
            }

            conn.disconnect();

        } catch (MalformedURLException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }
    }
}

使用HttpClient实现：

import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.client.utils.URIBuilder;

public class HttpGetRequest {
    public static void main(String[] args) {
        try {
            String urlStr = "http://example.com/api";
            URIBuilder builder = new URIBuilder(urlStr);
            builder.setParameter("param1", "value1");
            builder.setParameter("param2", "value2");

            HttpClient client = HttpClientBuilder.create().build();
            HttpGet request = new HttpGet(builder.build());
            request.addHeader("Accept", "application/json");

            HttpResponse response = client.execute(request);

            BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));

            String output;
            System.out.println("Output from Server .... \n");
            while ((output = br.readLine()) != null) {
                System.out.println(output);
            }

            client.getConnectionManager().shutdown();

        } catch (MalformedURLException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        } catch (URISyntaxException e) {

            e.printStackTrace();

        }
    }
}

在上面的示例中，我们通过URL传递了两个参数：param1和param2。您可以根据您的需求添加更多的参数。