2. 程式人生 > >Http請求工具類

Http請求工具類

阿新 • • 發佈：2019-01-22

HttpUtil.java

package com.jrbac.util;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.entity.StringEntity;
import org.apache.http.entity.mime.HttpMultipartMode;
import
 
 org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
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;
import
 
 org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** * Http工具類，傳送Http請求， Get請求請將引數放在url中 Post請求請將引數放在Map中 * * @author 程高偉 * @date 2017年1月5日 下午6:03:50 */
public classHttpUtil{
    private static final Logger log = LoggerFactory.getLogger(HttpUtil.class);
    private static final CloseableHttpClient httpclient = HttpClients.createDefault();
    private static final String userAgent = "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.87 Safari/537.36";

    /** * 傳送HttpGet請求 * * @param url * 請求地址 * @return 返回字串 */
    publicstatic String sendGet(String url) {
        String result = null;
        CloseableHttpResponse response = null;
        try {
            HttpGet httpGet = new HttpGet(url);
            httpGet.setHeader("User-Agent", userAgent);
            response = httpclient.execute(httpGet);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                result = EntityUtils.toString(entity);
            }
        } catch (Exception e) {
            log.error("處理失敗 {}" + e);
            e.printStackTrace();
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return result;
    }

    /** * 傳送HttpPost請求，引數為map * * @param url * 請求地址 * @param map * 請求引數 * @return 返回字串 */
    publicstatic String sendPost(String url, Map<String, String> map) {
        // 設定引數
        List<NameValuePair> formparams = new ArrayList<NameValuePair>();
        for (Map.Entry<String, String> entry : map.entrySet()) {
            formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
        }
        // 編碼
        UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
        // 取得HttpPost物件
        HttpPost httpPost = new HttpPost(url);
        // 防止被當成攻擊新增的
        httpPost.setHeader("User-Agent", userAgent);
        // 引數放入Entity
        httpPost.setEntity(formEntity);
        CloseableHttpResponse response = null;
        String result = null;
        try {
            // 執行post請求
            response = httpclient.execute(httpPost);
            // 得到entity
            HttpEntity entity = response.getEntity();
            // 得到字串
            result = EntityUtils.toString(entity);
        } catch (IOException e) {
            log.error(e.getMessage());
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return result;
    }

    /** * 傳送HttpPost請求，引數為檔案，適用於微信上傳素材 * * @param url * 請求地址 * @param file * 上傳的檔案 * @return 返回字串 * @throws IOException * @throws ClientProtocolException */
    publicstatic String sendPost(String url, File file) {
        String result = null;
        HttpPost httpPost = new HttpPost(url);
        // 防止被當成攻擊新增的
        httpPost.setHeader("User-Agent", userAgent);
        MultipartEntityBuilder multipartEntity = MultipartEntityBuilder.create();
        multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        multipartEntity.addPart("media", new FileBody(file));
        httpPost.setEntity(multipartEntity.build());
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpPost);
            HttpEntity entity = response.getEntity();
            result = EntityUtils.toString(entity);
        } catch (IOException e) {
            log.error(e.getMessage());
        } finally {
            // 關閉CloseableHttpResponse
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return result;

    }

    /** * 傳送HttpPost請求，引數為json字串 * * @param url * @param jsonStr * @return */
    publicstatic String sendPost(String url, String jsonStr) {
        String result = null;
        // 字串編碼
        StringEntity entity = new StringEntity(jsonStr, Consts.UTF_8);
        // 設定content-type
        entity.setContentType("application/json");
        HttpPost httpPost = new HttpPost(url);
        // 防止被當成攻擊新增的
        httpPost.setHeader("User-Agent", userAgent);
        // 接收引數設定
        httpPost.setHeader("Accept", "application/json");
        httpPost.setEntity(entity);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpPost);
            HttpEntity httpEntity = response.getEntity();
            result = EntityUtils.toString(httpEntity);
        } catch (IOException e) {
            log.error(e.getMessage());
        } finally {
            // 關閉CloseableHttpResponse
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return result;
    }

    /** * 傳送不帶引數的HttpPost請求 * * @param url * @return */
    publicstatic String sendPost(String url) {
        String result = null;
        // 得到一個HttpPost物件
        HttpPost httpPost = new HttpPost(url);
        // 防止被當成攻擊新增的
        httpPost.setHeader("User-Agent", userAgent);
        CloseableHttpResponse response = null;
        try {
            // 執行HttpPost請求，並得到一個CloseableHttpResponse
            response = httpclient.execute(httpPost);
            // 從CloseableHttpResponse中拿到HttpEntity
            HttpEntity entity = response.getEntity();
            // 將HttpEntity轉換為字串
            result = EntityUtils.toString(entity);
        } catch (IOException e) {
            log.error(e.getMessage());
        } finally {
            // 關閉CloseableHttpResponse
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return result;
    }
/*** Send a POST request to itcuties.com* @param query* @throws IOException*/public String echoCuties(String query) throws IOException {// Encode the queryString encodedQuery = URLEncoder.encode(query, "UTF-8");// This is the data that is going to be send to itcuties.com via POST request// 'e' parameter contains data to echoString postData = "e=" + encodedQuery;// Connect to google.comURL url = new URL("http://echo.itcuties.com");HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setDoOutput(true);connection.setRequestMethod("POST");connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");connection.setRequestProperty("Content-Length",  String.valueOf(postData.length()));// Write dataOutputStream os = connection.getOutputStream();os.write(postData.getBytes());// Read responseStringBuilder responseSB = new StringBuilder();BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));String line;while ( (line = br.readLine()) != null)responseSB.append(line);// Close streamsbr.close();os.close();return responseSB.toString();}// Run this examplepublic static void main(String[] args) {try {System.out.println(new POSTSenderExample().echoCuties("Hi there!"));} catch (IOException ioe) {ioe.printStackTrace();}} 
}

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