httpclient 4.5 get请求

时间：2023-12-26 09:06:49

还是官网靠谱啊

package com.test.httpclient.getpost;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

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.ResponseHandler;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

public class HttpRequestUtils {

    public static void main(String[] args) throws Exception {

        CloseableHttpClient httpclient = HttpClients.createDefault();

        String url = "https://blockchain.info/unspent?active=1Cdid9KFAaatwczBwBttQcwXYCpvK8h7FK";

        try {

            HttpGet httpGet = new HttpGet(url);

            CloseableHttpResponse response1 = httpclient.execute(httpGet);

         // Create a custom response handler

            ResponseHandler<String> responseHandler = new ResponseHandler<String>() {

                @Override

                public String handleResponse(

                        final HttpResponse response) throws ClientProtocolException, IOException {

                    int status = response.getStatusLine().getStatusCode();

                    if (status >= 200 && status < 300) {

                        HttpEntity entity = response.getEntity();

                        return entity != null ? EntityUtils.toString(entity) : null;

                    } else {

                        throw new ClientProtocolException("Unexpected response status: " + status);

                    }

                }

            };

            // The underlying HTTP connection is still held by the response object

            // to allow the response content to be streamed directly from the network socket.

            // In order to ensure correct deallocation of system resources

            // the user MUST call CloseableHttpResponse#close() from a finally clause.

            // Please note that if response content is not fully consumed the underlying

            // connection cannot be safely re-used and will be shut down and discarded

            // by the connection manager.

            try {

                System.out.println(response1.getStatusLine());

                System.out.println(response1.toString());

                HttpEntity entity1 = response1.getEntity();

                // do something useful with the response body

                // and ensure it is fully consumed

                String responseBody = httpclient.execute(httpGet, responseHandler);

                System.out.println(responseBody);

                EntityUtils.consume(entity1);

            } finally {

                response1.close();

            }

            /*HttpPost httpPost = new HttpPost("http://httpbin.org/post");

            List <NameValuePair> nvps = new ArrayList <NameValuePair>();

            nvps.add(new BasicNameValuePair("username", "vip"));

            nvps.add(new BasicNameValuePair("password", "secret"));

            httpPost.setEntity(new UrlEncodedFormEntity(nvps));

            CloseableHttpResponse response2 = httpclient.execute(httpPost);

            try {

                System.out.println(response2.getStatusLine());

                HttpEntity entity2 = response2.getEntity();

                // do something useful with the response body

                // and ensure it is fully consumed

                EntityUtils.consume(entity2);

            } finally {

                response2.close();

            }*/

        } finally {

            httpclient.close();

        }

    }

}
<dependencies>

        <dependency>

            <groupId>org.apache.httpcomponents</groupId>

             <artifactId>httpclient</artifactId>

             <version>4.5.2</version>

        </dependency>

</dependencies>

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