1.带文件的post请求

Map<String, Object> map = new HashMap<>();
map.put("list", list);
HttpClientUtil.httpMultipartListPost(URL + accessToken, files, map, request);

public static String httpMultipartListPost(String url, MultipartFile[] files, Map<String, Object> otherParams, HttpServletRequest request) {CloseableHttpClient httpClient = HttpClients.createDefault();String result = "";HttpEntity httpEntity = null;try {HttpPost httpPost = new HttpPost(url);MultipartEntityBuilder builder = MultipartEntityBuilder.create();builder.setCharset(StandardCharsets.UTF_8);builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); // 加上此行代码解决返回中文乱码问题// 添加文件参数for (MultipartFile file : files) {String fileName = file.getOriginalFilename();builder.addBinaryBody("file", file.getInputStream(), ContentType.MULTIPART_FORM_DATA, fileName); // 文件流}// 添加其他参数for (Map.Entry<String, Object> entry : otherParams.entrySet()) {if (entry.getKey().equals("list")) { // 跳过文件名参数和list参数String[] values = (String[]) entry.getValue();for (String value : values) {builder.addTextBody(entry.getKey(), value);}}else {builder.addTextBody(entry.getKey(), entry.getValue().toString());}}/** // 添加 HttpServletRequest request 参数 Enumeration<String> requestNames =* request.getParameterNames(); while (requestNames.hasMoreElements()) { String* paramName = requestNames.nextElement(); String[] paramValues =* request.getParameterValues(paramName); for (String paramValue : paramValues)* { builder.addTextBody(paramName, paramValue); } }*/httpEntity = builder.build();httpPost.setEntity(httpEntity);HttpResponse response = httpClient.execute(httpPost);HttpEntity responseEntity = response.getEntity();if (responseEntity != null) {result = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8);}} catch (Exception e) {e.printStackTrace();} finally {try {httpClient.close();} catch (IOException e) {e.printStackTrace();}}return result;}

2.采用x-www-form-urlencoded的post请求

String stockUrl = "http://www.test.com:88/openapi/test";
NameValuePair[] data = {new NameValuePair("usertoken","test"),new NameValuePair("businessObjectTypeId","test"),new NameValuePair("filter","fMaterialNumber in ("+query+")")
};

	public static String httpPostUrlencoded(String url, NameValuePair[] data) {System.out.println("GetPage:" + url);String content = null;HttpClient httpClient = new HttpClient();PostMethod method = new PostMethod(url);method.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8") ;method.setRequestBody(data);try {httpClient.executeMethod(method);
//			content = new String(method.getResponseBody());content = method.getResponseBodyAsString();} catch (Exception e) {System.out.println("time out");e.printStackTrace();} finally {if (method != null) method.releaseConnection();httpClient.getHttpConnectionManager().closeIdleConnections(0L);method = null;httpClient = null;}return content;}

3.带json的post请求

String param = "{\"codebars\": \"X\"}";
String stockUrl = "https://api.test.com/openapi/stocks/";		
Map<String, String> paramMap = new HashMap<String, String>();
String result = HttpClientUtil.sendPost(stockUrl, paramMap, param);

	public static String sendPost(String url, Map<String, String> headers, String data) {String response = null;try {CloseableHttpClient httpclient = null;CloseableHttpResponse httpresponse = null;SSLContext ctx = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {// 信任所有public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {return true;}}).build();try {SSLConnectionSocketFactory fac = new SSLConnectionSocketFactory(ctx, new String[] { "TLSv1.2" },null, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);httpclient = HttpClientBuilder.create().setSSLSocketFactory(fac).build();HttpPost httppost = new HttpPost(url);StringEntity stringentity = new StringEntity(data, ContentType.create("application/json", "UTF-8"));httppost.setEntity(stringentity);// 循环添加headerIterator headerIterator = headers.entrySet().iterator();while (headerIterator.hasNext()) {Entry<String, String> elem = (Entry<String, String>) headerIterator.next();httppost.addHeader(elem.getKey(), elem.getValue());}//发post请求httpresponse = httpclient.execute(httppost);//utf-8参数防止中文乱码response = EntityUtils.toString(httpresponse.getEntity(), "utf-8");} finally {if (httpclient != null) {httpclient.close();}if (httpresponse != null) {httpresponse.close();}}} catch (Exception e) {e.printStackTrace();}return response;}