httpurlconnection 和 httpclient 发送get、post请求

来源：互联网发布：一朝成名天下知猜生肖编辑：程序博客网时间：2024/05/17 06:32

import com.fasterxml.jackson.core.JsonProcessingException;import com.fasterxml.jackson.databind.ObjectMapper;import org.apache.http.Header;import org.apache.http.HttpHeaders;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.config.RequestConfig;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.entity.StringEntity;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;import org.apache.http.message.BasicHeader;import org.apache.http.protocol.HTTP;import org.springframework.http.MediaType;import java.io.*;import java.net.HttpURLConnection;import java.net.URL;import java.nio.charset.StandardCharsets;import java.util.*;/** * @author tracyclock * 2017.12.25 * httpurlconnection 和 httpclient 发送get、post请求 */public class HttpRequestUtil {    private static String postParam = "{\"userId\":\"999\",\"pos\":\"12.3201562,30.2456244\",\"buildIp\":\"127.0.0.1\",\"buildDvcid\":\"iphone6s\",\"buildModel\":\"1\",\"token\":\"fdgr456u6783grh\",\"type\":\"EID_INFO\"}";    private static String getUrl = "http://127.0.0.1:8022/getTest";    private static String postUrl = "http://127.0.0.1:8022/qrcode/eid/buildEidQr";    /**     * 向指定URL发送GET方法的请求     */    public static String sendGet(String url) {        String result = "";        BufferedReader bufferedReader = null;        try {            URL realUrl = new URL(url);            // 打开和URL之间的连接            HttpURLConnection connection = (HttpURLConnection)realUrl.openConnection();            //设置通用的请求属性,也可不做设置            connection.setRequestProperty("accept", "*/*");            connection.setRequestProperty("connection", "Keep-Alive");            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            //建立实际的连接            connection.connect();            //定义 BufferedReader输入流来读取URL的响应            bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));            String line;            while ((line = bufferedReader.readLine()) != null) {                result += line;            }        } catch (Exception e) {            e.printStackTrace();        }finally {            try {                if (bufferedReader != null) {                    bufferedReader.close();                }            } catch (Exception e2) {                e2.printStackTrace();            }        }        return result;    }    /**     * 向指定 URL 发送POST方法的请求     */    public static String sendPost(String url, String param,String paramFormat) {        StringBuffer result = new StringBuffer();        InputStream in = null;        PrintWriter out = null;        BufferedReader bufferedReader = null;        try {            URL realUrl = new URL(url);            //打开和URL之间的连接            HttpURLConnection connection = (HttpURLConnection)realUrl.openConnection();            //设置通用的请求属性,也可不做设置            connection.setRequestProperty("content-type", paramFormat);//指定参数格式            connection.setRequestProperty("accept", "*/*");            connection.setRequestProperty("connection", "Keep-Alive");            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            //发送POST请求必须设置如下两行，因为doOutput的默认值是false            connection.setDoOutput(true);            connection.setDoInput(true);            //获取HttpURLConnection对象对应的输出流            out = new PrintWriter(connection.getOutputStream());            out.print(param);            out.flush();            //建立连接            connection.connect();            //获取URL的响应            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {                in = connection.getInputStream();            } else {                in = connection.getErrorStream();            }            //result接收BufferedReader读取URL的响应            bufferedReader = new BufferedReader(new InputStreamReader(in));            String line;            while ((line = bufferedReader.readLine()) != null) {                result.append(line);            }        } catch (Exception e) {            e.printStackTrace();        }finally{            try {                if(bufferedReader != null){                    bufferedReader.close();                }                if(out != null){                    out.close();                }                if(in != null){                    in.close();                }            }catch (IOException e) {                e.printStackTrace();            }        }        return result.toString();    }    /**     * 将map形式的参数拼接get请求的参数字符串。     */    public static String buildGetParam(Map<String, Object> dataMap) {        StringBuilder formStr = new StringBuilder();        for (Map.Entry<String, Object> entry : dataMap.entrySet()) {            if (entry.getValue() != null) {                formStr.append(entry.getKey()).append('=').append(entry.getValue()).append('&');            }        }        int length = formStr.length();        if (length != 0) {            formStr.deleteCharAt(length - 1);        }        return formStr.toString();    }    /**     * 将object转化为json格式的字符串     */    public static String getJsonStr(Object object){        if(object == null){            return null;        }        ObjectMapper json = new ObjectMapper();        String jsonStr = "";        try {            jsonStr = json.writeValueAsString(object);        } catch (JsonProcessingException e) {            e.printStackTrace();        }        return jsonStr;    }    /**     * 发送 HttpGet 请求     */    public static String httpDoGet(String url){        String result = "";        CloseableHttpResponse response;        HttpGet httpGet = new HttpGet(url);        try {            response = httpClient.execute(httpGet);            int statusCode = response.getStatusLine().getStatusCode();            if (statusCode != HttpStatus.SC_OK) {                throw new RuntimeException("HttpClient,error status code :" + statusCode);            }            result =  getResponseStr(response);        } catch (IOException e) {            e.printStackTrace();        }finally {            httpGet.abort();        }        return result;    }    /**     * 发送 HttpPost 请求     */    public static String httpDoPost(String url, String param) {        String result = "";        CloseableHttpResponse response;        HttpPost httpPost = new HttpPost(url);        httpPost.addHeader(HTTP.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);        try {            StringEntity se = new StringEntity(param);            se.setContentType("text/json");            se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE));            httpPost.setEntity(se);            response = httpClient.execute(httpPost);            int statusCode = response.getStatusLine().getStatusCode();            if (statusCode != HttpStatus.SC_OK) {                throw new RuntimeException("HttpClient HttpPost() error status code :" + statusCode);            }            result =  getResponseStr(response);        } catch (Exception e) {            e.printStackTrace();        } finally {            httpPost.abort();        }        return result;    }    /**     * 将response返回的实体信息转化成字符串     */    public static String getResponseStr(HttpResponse response){        if (response != null) {            BufferedReader br = null;            try {                if (response.getEntity() == null) {                    return null;                }                br = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), StandardCharsets.UTF_8));                StringBuffer sb = new StringBuffer();                String result;                while ((result = br.readLine()) != null) {                    sb.append(result);                }                return sb.toString();            } catch (IOException e) {                e.printStackTrace();            } finally {                if (br != null) {                    try {                        br.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                }            }        }        return null;    }    /**     * 创建CloseableHttpClient 线程池     * 用CloseableHttpClient，可以保证httpClient.execute()执行的response最终被close掉     */    private static CloseableHttpClient httpClient;    static{        //当出现连接超时或应答超时的情况，如果没有超时处理，会导致内存不足、或线程池被用光，需要设置timeout        RequestConfig requestConfig = RequestConfig.custom()                //从连接池获取连接                .setConnectionRequestTimeout(30000)                //连接超时                .setConnectTimeout(15000)                //服务响应超时                .setSocketTimeout(30000)                .build();        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();        //单路由最大连接        cm.setDefaultMaxPerRoute(100);        cm.setMaxTotal(100);        //设置默认请求头        List<Header> headers = new ArrayList<>();        headers.add(new BasicHeader(HttpHeaders.ACCEPT_LANGUAGE, Locale.CHINA.toString()));        httpClient = HttpClients.custom()                .setDefaultRequestConfig(requestConfig)                .setConnectionManager(cm)                .setDefaultHeaders(headers)                .setKeepAliveStrategy((httpResponse, httpContext) -> 10 * 1000)                .build();    }    public static void main(String[] args) {        //get测试需要的参数        Map<String,Object> map = new HashMap<>();        map.put("name","ha");        String url = getUrl + "?" + buildGetParam(map);        //httpUrlConnection get测试        String httpUrlConnectionGetResult = sendGet(url);        System.out.println("httpUrlConnection get Result ----------"+httpUrlConnectionGetResult);        //httpUrlConnection post测试        String httpUrlConnectionPostResult = sendPost(postUrl,postParam, MediaType.APPLICATION_JSON_VALUE);        System.out.println("httpUrlConnection  post Result -------------" + httpUrlConnectionPostResult);        //httpClient get测试        String httpClientGetResult = httpDoGet(url);        System.out.println("httpClient get Result ----------"+ httpClientGetResult);        //httpClient post测试        String httpClientPostResult = httpDoPost(postUrl,postParam);        System.out.println("httpClient post Result ----------"+ httpClientPostResult);    }}

打印结果：

httpUrlConnection get Result ----------this is tracyClockhttpUrlConnection  post Result -------------{"success":true,"resultCode":0,"data":"{\"A\":1,\"K\":\"/ndUowQir7xjPtVAM8/akOKzSMT8q24NrgSHcCzfgY0=\",\"P\":\"12.3201562,30.2456244\",\"S\":\"MEUCIQDbWsGnsXDvORfZ14D5E+maKXvS/fEluKV0/hq6XR8o6QIgbMOZrNxOd7xTGlFHrcsFWriS\\r\\noJpWAyWIagyhz9duv4Q=\\r\\n\",\"T\":1514169504505,\"V\":\"1\"}"}httpClient get Result ----------this is tracyClockhttpClient post Result ----------{"success":true,"resultCode":0,"data":"{\"A\":1,\"K\":\"/ndUowQir7xjPtVAM8/akB/iWu0GD6L4PJP2XG1YppM=\",\"P\":\"12.3201562,30.2456244\",\"S\":\"MEUCIQDLe2O1FPfFW9/WRNMNFxucn9orMEgOVZiRjICf54dFlgIgE0MR3doPUM1qY32K1lcPwLHP\\r\\nJzSJ1edT+UkghcnNs08=\\r\\n\",\"T\":1514169504607,\"V\":\"1\"}"}

阅读全文

0 0