如何使用Apache HttpClient在Post请求中编码俄语文本？

Question

以下是Java代码：

    public static void register(UserInfo info) throws ClientProtocolException, IOException, JSONException, RegistrationException {
        List<NameValuePair> params=new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("name", info.getName()));
        params.add(new BasicNameValuePair("email", info.getEmail()));
        params.add(new BasicNameValuePair("pass", info.getPassword()));
        params.add(new BasicNameValuePair("genus", String.valueOf(info.getGenus())));
        String response=doPostRequest(params, REGISTRATION_URL);
    }

private static String doPostRequest(List<NameValuePair> params, String url) throws ClientProtocolException, IOException {
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(url);

    httppost.setEntity(new UrlEncodedFormEntity(params));
    HttpResponse response = httpclient.execute(httppost); 

    return getContentFromInputStream(response.getEntity().getContent());
} 

private static String getContentFromInputStream(InputStream is) throws IOException {
    String line;
    StringBuilder sb=new StringBuilder();
    BufferedReader reader=new BufferedReader(new InputStreamReader(is));
    while((line=reader.readLine())!=null) {
        sb.append(line);
    }
    reader.close();
    return sb.toString();
}

如上所示，我发送了POST请求并获取到响应。但是，在注册方法中，我使用了俄语名称（西里尔字母），服务器上出现了“????? ???”。我该如何解决这个问题？如何对俄文进行编码？

- user2218845

---

你传递什么作为你的内容类型？使用了什么字符集？ - fge

你使用哪个服务器？ - Menelaos

Answer 1

您需要将请求编码设置为UTF-8。

The request or response body can be any encoding, but by default is ISO-8859-1. The encoding may be specified in the Content-Type header, for example:
Content-Type: text/html; charset=UTF-8

从：http://hc.apache.org/httpclient-3.x/charencodings.html

这是一个实现的例子：

HttpClient httpclient = new HttpClient();
httpclient.getParams().setParameter("http.protocol.version", HttpVersion.HTTP_1_1);
httpclient.getParams().setParameter("http.protocol.content-charset", "UTF-8");

此外，我看到你正在使用 UrlEncodedFormEntity。你应该在构造函数中添加编码，如下所示：

new UrlEncodedFormEntity(nameValuePairs,"UTF-8");

- Menelaos

---

有用的链接：https://dev59.com/4m435IYBdhLWcg3wtCOQ 。同时，请确保服务器也能够读取UTF-8编码。 - Menelaos

Answer 2

你应该尝试对参数进行编码。

URLEncoder.encode(URL, "UTF-8");

- shreyansh jogi

Answer 3

httpclient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");

- larryhu

---

请解释您的答案。 - Gwenc37

Answer 4

也许您正在错误地阅读或编写响应？

请确保在编写请求和读取请求以及post http headers中使用相同的编码。

要为读取数据定义编码，请使用InputStreamReader(InputStream, Charset)构造函数。

- Dariusz

Answer 5

如果你已经厌倦了不断寻找正确的头文件/编码组合，那么你可以将字符串编码为URI格式并解码回来，这样就可以保留任何非ASCII字符。

String cyrillicString = "ыыыыыы";

//encode string into URI format
String transportString = URLEncoder.encode(cyrillicString, "UTF-8");

//transport string somewhere 

//decode back
String decodedString = URLDecoder.decode(transportString, "UTF-8");

- JackHammer

Answer 6

如果您以json格式发布：

1. 创建客户端

HttpClientBuilder clientBuilder = HttpClients.custom();
//add header with charset UTF-8
clientBuilder.setDefaultHeaders(Arrays.asList(new BasicHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType()))); //application/json;charset=UTF-8
CloseableHttpClient httpClient = clientBuilder.build();

创建 HttpPost

HttpPost post = new HttpPost("/hostIp:port/forexample/saveMyObject");

将对象写成字符串（String）

PostRequestExample request = new PostRequestExample();
request.setUsername("userName");
request.setUserAge(98));

ObjectMapper objectMapper = new ObjectMapper(); //import com.fasterxml.jackson.databind
//ContentType.APPLICATION_JSON - encode russian symbols as UTF8
post.setEntity(new StringEntity(objectMapper.writeValueAsString(request), ContentType.APPLICATION_JSON));

4. 执行

CloseableHttpResponse response = httpClient.execute(post);

- pavel.kh