原文出处： Hosee

背景：

记录一下使用中关于HttpClient以及Json传递的坑。

HTTPS:

普通方式：

public class Test { public static void main(String[] args) throws Exception { URI uri = new URIBuilder().setScheme("http").setHost("***:**") .setPath("/***/***").build(); HttpClient httpClient = HttpClientBuilder.create().build(); HttpPost httpPost = new HttpPost(uri); httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded"); List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("params", "test")); HttpResponse httpResponse = httpClient.execute(httpPost); StatusLine httpStatus = httpResponse.getStatusLine(); HttpEntity httpEntity = httpResponse.getEntity(); System.out.println("httpStatusline: " + httpStatus); System.out.println("strEntity: " + EntityUtils.toString(httpEntity)); EntityUtils.consume(httpEntity); } }

这种适合普通的http的请求，当把Scheme换成https时，

报错：

sun.security.validator.ValidatorException: PKIX path building failed

客户端没有证书，可以在代码中跳过证书验证。

public static String sendPost(final URI uri, final List<NameValuePair> params) throws ClientProtocolException, IOException, NoSuchAlgorithmException, KeyManagementException { String result = null; SSLContext sslContext = SSLContext.getInstance("SSL"); // set up a TrustManager that trusts everything sslContext.init(null, new TrustManager[] { new X509TrustManager() { public X509Certificate[] getAcceptedIssuers() { return null; } public void checkClientTrusted(X509Certificate[] certs, String authType) { } public void checkServerTrusted(X509Certificate[] certs, String authType) { } } }, new SecureRandom()); CloseableHttpClient httpclient = HttpClients.custom() .setSSLSocketFactory(new SSLSocketFactory(sslContext)).build(); HttpPost httpPost = new HttpPost(uri); httpPost.addHeader("Content-type", "application/json"); httpPost.setEntity(new UrlEncodedFormEntity(params)); CloseableHttpResponse response = httpclient.execute(httpPost); try { HttpEntity entity = response.getEntity(); result = EntityUtils.toString(entity); EntityUtils.consume(entity); } finally { response.close(); } return result; } request.getParameter无法得到appliation/json的数据 @ResponseBody @RequestMapping(value = "/**/**.json", method = RequestMethod.POST) public String valiate(ModelMap map, HttpServletRequest request) { System.out.println(request.getParameter("param")); }

这种方式无法得到Content-Type是appliation/json的数据。

这种方式适合Content-Type为application/x-www-form-urlencoded的请求。

解决：

@ResponseBody @RequestMapping(value = "/**/**.json", method = RequestMethod.POST ) public String valiate(ModelMap map, @RequestBody String request) { JSONObject requestJson = JSON.parseObject(request); }

这里需要说明的是@RequestBody需要接的参数是一个string化的json，而不是一个json对象，也可以用对象类型来接收。

Reference：

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