http发送get、post请求

深藏阁楼爱情的钟 2022-07-14 02:52 287阅读 0赞

发送get、post请求简单举例，代码如下：

import com.google.common.base.Stopwatch;
    import com.google.common.base.Strings;
    import org.apache.commons.httpclient.*;
    import org.apache.commons.httpclient.methods.GetMethod;
    import org.apache.commons.httpclient.params.HttpMethodParams;
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.util.EntityUtils;
    import org.mortbay.util.UrlEncoded;
    
    import java.io.*;
    import java.net.URL;
    import java.net.URLConnection;
    import java.util.List;
    import java.util.Map;
    import java.util.concurrent.TimeUnit;
    
    public class HttpClientTest { 
    
        //*根据url得到数据
        public static void httpClientTest() throws IOException {
            final Stopwatch stopwatch = Stopwatch.createUnstarted().start();
            String responseMsg = "";
    
            HttpClient httpClient = new HttpClient();
            String id = "~IgOMOo15IUf1NfENGQV+Gw==~1~_116476553_6";
            String url = "http://xxxxxx/" + UrlEncoded.encodeString(id);
    
            GetMethod getMethod = new GetMethod(url);
            getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
    
            //3.执行getMethod,调用http接口
            httpClient.executeMethod(getMethod);
            //4.读取内容
            byte[] responseBody = getMethod.getResponseBody();
            //5.处理返回的内容
            responseMsg = new String(responseBody);
            System.out.println(responseMsg);
            System.out.println("query cost 1: " + stopwatch.elapsed(TimeUnit.MILLISECONDS));
        }
    
        //根据url得到数据
        public static void httpGet(){
            final Stopwatch stopwatch = Stopwatch.createUnstarted().start();
            try {
                String id = "~IgOMOo15IUf1NfENGQV+Gw==~1~_116476553_6";
                //String url = "https://uland.taobao.com/coupon/edetail?e=huuWrBr87UIN%2BoQUE6FNzLHOv%2FKoJ4LsM%2FOCBWMCflrRpLchICCDoqC1%2FGlh90mJfFEjLtoHpPCLQAGMzNbHRBpywujSvOp2nUIklpPPqYL9BYNf2%2FonKY57aXDe3JrR2pd4uaXWR8D1g9gleiedVtDvjgqDLA1q&pid=mm_115940806_14998982_61982315&af=1";
                String url = "https://shop.m.taobao.com/shop/coupon.htm?sellerId=696902416&activityId=4aee3e6538d94b518e19b53d3b04f30c";
    
                // 创建HttpClient对象
                org.apache.http.client.HttpClient client = HttpClients.createDefault();
                // 创建GET请求（在构造器中传入URL字符串即可）
                HttpGet get = new HttpGet(url);
                // 调用HttpClient对象的execute方法获得响应
                HttpResponse response = client.execute(get);
                response.setHeader("content-type", "application/json");
    
                ///response.setEntity(new StringEntity(query, "utf-8"));
                // 调用HttpResponse对象的getEntity方法得到响应实体
                HttpEntity httpEntity = response.getEntity();
                // 使用EntityUtils工具类得到响应的字符串表示
    
                String result = EntityUtils.toString(httpEntity,"utf-8");
                System.out.println(result);
            }catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }catch (IOException e) {
                e.printStackTrace();
            }
            System.out.println("query cost 2:" + stopwatch.elapsed(TimeUnit.MILLISECONDS));
        }
    
        //可以根据实际的query得到数据
        public static void httpPost(){
            final Stopwatch stopwatch = Stopwatch.createUnstarted().start();
            try {
                String query = "{\"from\":0,\"size\":10,\"query\":{\"bool\":{\"must\":[{\"match\":{\"buyer_nick\":{\"query\":\"11杨柳絮语言\",\"type\":\"phrase\"}}}]}}}";
                // String url = "http://xxxxx:9200/index_address/address/_search";
    
                String url = "https://shop.m.taobao.com/shop/coupon.htm?sellerId=696902416&activityId=4aee3e6538d94b518e19b53d3b04f30c";
    
                // 创建HttpClient对象
                org.apache.http.client.HttpClient client = HttpClients.createDefault();
    
                // 创建POST请求
                HttpPost post = new HttpPost(url);
    
                // 向POST请求中添加消息实体
                //post.setHeader("content-type", "application/json");
                //post.setEntity(new StringEntity(query, "utf-8"));
    
                // 得到响应并转化成字符串
                String responseMsg = "";
                HttpResponse response = client.execute(post);
                if(response.getStatusLine().getStatusCode() == 302){
                    String locationUrl = response.getLastHeader("Location").getValue();
                    System.out.println(locationUrl);
                } else {
                    HttpEntity httpEntity = response.getEntity();
                    String result = EntityUtils.toString(httpEntity, "UTF-8");
                    System.out.println(result);
                }
    
            }catch (Exception e){
    
            } finally {
    
            }
            System.out.println("query cost 3:" + stopwatch.elapsed(TimeUnit.MILLISECONDS));
        }
    
        /** * 执行一个HTTP GET请求，返回请求响应的HTML * * @return 返回请求响应的HTML */
        public static String doGet() {
            String url = "https://shop.m.taobao.com/shop/coupon.htm?sellerId=696902416&activityId=4aee3e6538d94b518e19b53d3b04f30c";
            String response = null;
            HttpClient client = new HttpClient();
            HttpMethod method = new GetMethod(url);
            try {
    
                client.executeMethod(method);
                if (method.getStatusCode() == HttpStatus.SC_OK) {
                    response = method.getResponseBodyAsString();
                }
            } catch (URIException e) {
                System.out.println("执行HTTP Get请求时，编码查询字符串");
            } catch (IOException e) {
                System.out.println("执行HTTP Get请求" + url + "时，发生异常！");
            } finally {
                method.releaseConnection();
            }
            return response;
        }
    }