HttpClient 以及 Json 传递的一些坑
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来源：Hosee，
my.oschina.net/hosee/blog/1541219
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：
1. http://blog.csdn.net/mack415858775/article/details/52388484
2. http://blog.csdn.net/g1248019684/article/details/50850386
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