httpclient封装
pom文件：
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.13</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.4.13</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.5.7</version>
</dependency>
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
代码：
package com.example.demo.server; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.NoHttpResponseException; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.config.RequestConfig; 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.conn.HttpHostConnectException; import org.apache.http.entity.StringEntity; import org.apache.http.entity.mime.MultipartEntityBuilder; 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; import org.springframework.stereotype.Component; import java.io.*; import java.net.ConnectException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.nio.charset.Charset; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.util.*; import java.util.Map.Entry; @Component public class HttpRequest { private static final Logger log = LoggerFactory.getLogger(HttpRequest.class); /** * 使用HttpClient以JSON格式发送post请求 * @param urlParam * @param jsonparams * @param socketTimeout * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws UnsupportedEncodingException * @throws IOException */ public static String httpClientPost(String urlParam,String jsonparams,Integer socketTimeout) throws NoSuchAlgorithmException, KeyManagementException, UnsupportedEncodingException, IOException{ StringBuffer resultBuffer = null; CloseableHttpClient httpclient=HttpClients.createDefault(); HttpPost httpPost = new HttpPost(urlParam); RequestConfig requestConfig = RequestConfig.custom() .setConnectTimeout(3000).setConnectionRequestTimeout(1500) .setSocketTimeout(socketTimeout).build(); httpPost.setConfig(requestConfig); httpPost.setHeader("Content-Type", "application/json"); // 构建请求参数 BufferedReader br = null; try { if(null!=jsonparams&&jsonparams.length()>0){ StringEntity entity = new StringEntity(jsonparams,"utf-8"); httpPost.setEntity(entity); } CloseableHttpResponse response = httpclient.execute(httpPost); // 读取服务器响应数据 resultBuffer = new StringBuffer(); if(null!=response.getEntity()){ br = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "utf-8")); String temp; while ((temp = br.readLine()) != null) { resultBuffer.append(temp); } } } catch (RuntimeException e) { log.error("网络链接出现异常，请检查...",e); throw new RuntimeException(e); } catch (ConnectException e) { log.error("客户端网络无法链接，请检查...",e); throw new ConnectException(); } finally { if (br != null) { try { br.close(); } catch (IOException e) { br = null; throw new RuntimeException(e); } } } return resultBuffer.toString(); } /** * 方式一：HttpClient解决以post方式，用json传输x-www-form-urlencoded数据 */ public static String doPostJson(String url,String key,String json){ try { String postURL=url; PostMethod postMethod = null; postMethod = new PostMethod(postURL) ; postMethod.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8") ; postMethod.addParameter(key,json); //传参数 HttpClient httpClient = new HttpClient(); int response = httpClient.executeMethod(postMethod); // 执行POST方法 String result = postMethod.getResponseBodyAsString() ; return result; } catch (Exception e) { throw new RuntimeException(e.getMessage()); } } /** * 方式二：HttpClient解决以post方式，用json传输x-www-form-urlencoded数据 */ public static String doPost(String url, Map<String, Object> paramMap) { CloseableHttpClient httpClient = null; CloseableHttpResponse httpResponse = null; String result = ""; // 创建httpClient实例 httpClient = HttpClients.createDefault(); // 创建httpPost远程连接实例 HttpPost httpPost = new HttpPost(url); // 配置请求参数实例 RequestConfig requestConfig = RequestConfig.custom() .setConnectTimeout(35000) // 设置连接主机服务超时时间 .setConnectionRequestTimeout(35000) // 设置连接请求超时时间 .setSocketTimeout(60000) // 设置读取数据连接超时时间 .build(); // 为httpPost实例设置配置 httpPost.setConfig(requestConfig); // 设置请求头 httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded"); // 封装post请求参数 if (null != paramMap && paramMap.size() > 0) { List<NameValuePair> nvps = new ArrayList<NameValuePair>(); // 通过map集成entrySet方法获取entity Set<Entry<String, Object>> entrySet = paramMap.entrySet(); // 循环遍历，获取迭代器 Iterator<Entry<String, Object>> iterator = entrySet.iterator(); while (iterator.hasNext()) { Map.Entry<String, Object> mapEntry = iterator.next(); nvps.add(new BasicNameValuePair(mapEntry.getKey(), mapEntry.getValue().toString())); } // 为httpPost设置封装好的请求参数 try { httpPost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8")); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } try { // httpClient对象执行post请求,并返回响应参数对象 httpResponse = httpClient.execute(httpPost); // 从响应对象中获取响应内容 HttpEntity entity = httpResponse.getEntity(); result = EntityUtils.toString(entity); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { // 关闭资源 if (null != httpResponse) { try { httpResponse.close(); } catch (IOException e) { e.printStackTrace(); } } if (null != httpClient) { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * 使用HttpClient以JSON格式发送get请求 * @param urlParam * @param params * @param socketTimeout * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws NoHttpResponseException */ public static String httpClientGet(String urlParam, Map<String, Object> params,Integer socketTimeout) throws NoSuchAlgorithmException, KeyManagementException,NoHttpResponseException { StringBuffer resultBuffer = null; CloseableHttpClient httpclient=HttpClients.createDefault(); BufferedReader br = null; // 构建请求参数 StringBuffer sbParams = new StringBuffer(); if (params != null && params.size() > 0) { for (Entry<String, Object> entry : params.entrySet()) { sbParams.append(entry.getKey()); sbParams.append("="); try { sbParams.append(URLEncoder.encode(String.valueOf(entry.getValue()), "utf-8")); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } sbParams.append("&"); } } if (sbParams != null && sbParams.length() > 0) { urlParam = urlParam + "?" + sbParams.substring(0, sbParams.length() - 1); } HttpGet httpGet = new HttpGet(urlParam); RequestConfig requestConfig = RequestConfig.custom() .setConnectTimeout(3000).setConnectionRequestTimeout(1500) .setSocketTimeout(socketTimeout).build(); httpGet.setConfig(requestConfig); try { CloseableHttpResponse response = httpclient.execute(httpGet); // 读取服务器响应数据 br = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "utf-8")); String temp; resultBuffer = new StringBuffer(); while ((temp = br.readLine()) != null) { resultBuffer.append(temp); } } catch (Exception e) { throw new RuntimeException(e); } finally { if (br != null) { try { br.close(); } catch (IOException e) { br = null; throw new RuntimeException(e); } } } return resultBuffer.toString(); } /** * 上传文件 * @param urlParam * @param loadpath * @param file * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws HttpHostConnectException * @author Seagull * @date 2019年3月15日 */ public static String httpClientUploadFile(String urlParam, String loadpath, File file) throws NoSuchAlgorithmException, KeyManagementException, HttpHostConnectException { StringBuffer resultBuffer = null; CloseableHttpClient httpclient=HttpClients.createDefault(); HttpPost httpPost = new HttpPost(urlParam); // 构建请求参数 BufferedReader br = null; try { MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create(); //设置请求的编码格式 entityBuilder.setCharset(Charset.forName("utf-8")); entityBuilder.addBinaryBody("jarfile", file); entityBuilder.addTextBody("loadpath", loadpath); HttpEntity reqEntity =entityBuilder.build(); httpPost.setEntity(reqEntity); CloseableHttpResponse response = httpclient.execute(httpPost); //从状态行中获取状态码 String responsecode = String.valueOf(response.getStatusLine().getStatusCode()); // 读取服务器响应数据 resultBuffer = new StringBuffer(); br = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "utf-8")); String temp; while ((temp = br.readLine()) != null) { resultBuffer.append(temp); } if(resultBuffer.length()==0){ resultBuffer.append("上传文件异常，响应码："+responsecode); } } catch (Exception e) { throw new RuntimeException(e); } finally { if (br != null) { try { br.close(); } catch (IOException e) { br = null; throw new RuntimeException(e); } } } return resultBuffer.toString(); } /** * httpclicent 发送form-data请求,没有上传文件 * @param urlParam 请求url * @param requestParams 请求参数 * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws HttpHostConnectException */ public static String httpClientUploadPost(String urlParam, Map<String,Object> requestParams) throws NoSuchAlgorithmException, KeyManagementException, HttpHostConnectException { StringBuffer resultBuffer = null; CloseableHttpClient httpclient=HttpClients.createDefault(); HttpPost httpPost = new HttpPost(urlParam); // 构建请求参数 BufferedReader br = null; try { MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create(); //设置请求的编码格式 entityBuilder.setCharset(Charset.forName("utf-8")); // entityBuilder.addBinaryBody("jarfile", file); if (requestParams!=null&&requestParams.size()>0){ for (Map.Entry<String, Object> entry: requestParams.entrySet()) { entityBuilder.addTextBody(entry.getKey(), (String) entry.getValue()); } } HttpEntity reqEntity =entityBuilder.build(); httpPost.setEntity(reqEntity); CloseableHttpResponse response = httpclient.execute(httpPost); //从状态行中获取状态码 String responsecode = String.valueOf(response.getStatusLine().getStatusCode()); // 读取服务器响应数据 resultBuffer = new StringBuffer(); br = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "utf-8")); String temp; while ((temp = br.readLine()) != null) { resultBuffer.append(temp); } if(resultBuffer.length()==0){ resultBuffer.append("上传文件异常，响应码："+responsecode); } } catch (Exception e) { throw new RuntimeException(e); } finally { if (br != null) { try { br.close(); } catch (IOException e) { br = null; throw new RuntimeException(e); } } } return resultBuffer.toString(); } /** * 获取文件流 * @param urlParam * @param params * @return * @throws IOException * @throws HttpHostConnectException * @author Seagull * @date 2019年3月15日 */ public static byte[] getFile(String urlParam, Map<String, Object> params) throws IOException, HttpHostConnectException{ // 构建请求参数 StringBuffer sbParams = new StringBuffer(); if (params != null && params.size() > 0) { for (Entry<String, Object> entry : params.entrySet()) { sbParams.append(entry.getKey()); sbParams.append("="); try { sbParams.append(URLEncoder.encode(String.valueOf(entry.getValue()), "utf-8")); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } sbParams.append("&"); } } if (sbParams != null && sbParams.length() > 0) { urlParam = urlParam + "?" + sbParams.substring(0, sbParams.length() - 1); } URL urlConet = new URL(urlParam); HttpURLConnection con = (HttpURLConnection)urlConet.openConnection(); con.setRequestMethod("GET"); con.setConnectTimeout(4 * 1000); InputStream inStream = con .getInputStream(); //通过输入流获取图片数据 ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] buffer = new byte[2048]; int len = 0; while( (len=inStream.read(buffer)) != -1 ){ outStream.write(buffer, 0, len); } inStream.close(); byte[] data = outStream.toByteArray(); return data; } }
测试代码：
public class TestHttp { public static void main(String[] args) { String url="https://xxxxxxxxx"; String json ="xxxxx";
String body = HttpRequest.doPostJson(url, "body", json); Map<String, Object> map = new HashMap<>(); map.put("body", json); String doPost = HttpRequest.doPost(url, map); System.out.println("这是第一种方式："+body); System.out.println("这是第二种方式："+doPost); } }
