使用httpclient代理服务和传递参数以及返回response

使用 HttpClient 来代理服务并传递参数以及获取响应结果的代码示例如下：

import java.io.IOException;
import.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.util.ArrayList;
import java.util.List;

public class HttpClientExample {
    public static void main(String[] args) {
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();

        try {
            // GET 请求示例
            String getEndpoint = "https://api.example.com/endpoint";
            String getRequestParams = "?param1=value1&param2=value2";

            String getUrl = getEndpoint + getRequestParams;

            HttpGet httpGet = new HttpGet(getUrl);
            HttpResponse getResponse = httpClient.execute(httpGet);
            HttpEntity getEntity = getResponse.getEntity();

            if (getEntity != null) {
                InputStream inputStream = getEntity.getContent();
                // 处理输入流，获取响应结果
                String responseString = convertInputStreamToString(inputStream);
                System.out.println("GET 响应结果：" + responseString);
            }

            // POST 请求示例
            String postEndpoint = "https://api.example.com/endpoint";
            HttpPost httpPost = new HttpPost(postEndpoint);

            // 设置 POST 请求参数
            List<NameValuePair> postParams = new ArrayList<>();
            postParams.add(new BasicNameValuePair("param1", "value1"));
            postParams.add(new BasicNameValuePair("param2", "value2"));

            httpPost.setEntity(new UrlEncodedFormEntity(postParams));

            HttpResponse postResponse = httpClient.execute(httpPost);
            HttpEntity postEntity = postResponse.getEntity();

            if (postEntity != null) {
                InputStream inputStream = postEntity.getContent();
                // 处理输入流，获取响应结果
                String responseString = convertInputStreamToString(inputStream);
                System.out.println("POST 响应结果：" + responseString);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    private static String convertInputStreamToString(InputStream inputStream) throws IOException {
        StringBuilder result = new StringBuilder();
        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) != -1) {
            result.append(new String(buffer, 0, length, StandardCharsets.UTF_8));
        }
        return result.toString();
    }
}

上述代码使用 Apache HttpClient 来发送 GET 和 POST 请求。你可以根据实际情况进行修改和调整，以适应你的代理服务和传递的参数。获取到响应结果后，你可以根据需要进行进一步处理。