如何在Java中的HTTP响应中更改字符集编码 [英] How can i change charset encoding in HTTP response in Java

问题描述

我必须从远程服务器获取一些JSON对象，为此我使用这个功能，这是工作伟大的，除了有时一些奇怪的数据被获取，我相信是因为它是使用ASCII字符集解码。 / p>

请在下面找到我使用

的方法

  public HttpResponse call （String serviceURL，String serviceHost，String namespace，String methodName，String payloadKey，String payloadValue）throws ClientProtocolException，IOException，JSONException 
 {
 HttpResponse response = null; 
 HttpContext HTTP_CONTEXT = new BasicHttpContext（）; 
 HTTP_CONTEXT.setAttribute（CoreProtocolPNames.USER_AGENT，Mozilla / 5.0）; 
 HttpPost httppost = new HttpPost（serviceURL）; 
 httppost.setHeader（User-Agent，Constants.USER_AGENT_BROWSER_FIREFOX）; 
 httppost.setHeader（Accept，application / json，text / javascript，* / *）; 
 httppost.setHeader（Accept-Language，en-US，en; q = 0.8）; 
 httppost.setHeader（Content-Encoding，foo-1.0）; 
 httppost.setHeader（Content-Type，application / json; charset = UTF-8）; 
 httppost.setHeader（X-Requested-With，XMLHttpRequest）; 
 httppost.setHeader（Host，serviceHost）; 
 httppost.setHeader（X-Foo-Target，String.format（％s。％s，namespace，methodName））; 
 / * Making Payload * / 
 JSONObject objectForPayload = new JSONObject（）; 
 objectForPayload.put（payloadKey，payloadValue）; 
 StringEntity stringentity = new StringEntity（objectForPayload.toString（））; 
 httppost.setEntity（stringentity）; 
 response = client.execute（httppost）; 
 return response; 
 
 
} 
  

我传递的所有标头正确，我已经验证了通过inspect元素在Google chrome或Firebug插件，如果你熟悉Mozilla的相同。

现在的问题是，大多数时间，我得到可读的数据，但有时我得到不可读的数据。

我使用eclipse调试，注意到wrappedEntity下的字符集显示为US-ASCII。我附加了一个jpg作为参考

有人可以告诉我怎么能改变字符集从ASCII到UTF-8的响应之前，我 response = client.execute（httppost）; 。
PS：正如你已经注意到，我传递charset = utf-8在标题，我已经验证使用firebug和谷歌chrome，我传递确切的标头。

请放大以更清楚地查看图片

提前感谢

方案

我能够解决这个问题，只是提到它可能面临类似问题的人。
在获得响应之后，首先通过使用
HttpEntity entity = response.getEntity（）;
获取实体， json对象将实体转换为字符串，但使用UTF-8这样的东西
responseJsonObject = new JSONObject（EntityUtils.toString（entity，UTF-8））;

以前我只是在做
responseJsonObject = new JSONObject（EntityUtils.toString（entity））;

I have to fetch some JSON object from a remote server and for that i am using this function which is working great except that for sometime some weird data is getting fetched which i believe is because it is using ASCII charset to decode.

Please find below thw method that i am using

public HttpResponse call(String serviceURL,String serviceHost,String namespace,String methodName,String payloadKey, String payloadValue) throws ClientProtocolException,IOException,JSONException
    {
            HttpResponse response = null;
            HttpContext HTTP_CONTEXT = new BasicHttpContext();
            HTTP_CONTEXT.setAttribute(CoreProtocolPNames.USER_AGENT, "Mozilla/5.0");
            HttpPost httppost = new HttpPost(serviceURL);
            httppost.setHeader("User-Agent",Constants.USER_AGENT_BROWSER_FIREFOX);
            httppost.setHeader("Accept", "application/json, text/javascript, */*");
            httppost.setHeader("Accept-Language","en-US,en;q=0.8");
            httppost.setHeader("Content-Encoding", "foo-1.0");
            httppost.setHeader("Content-Type", "application/json; charset=UTF-8");
            httppost.setHeader("X-Requested-With","XMLHttpRequest");
            httppost.setHeader("Host",serviceHost);
            httppost.setHeader("X-Foo-Target", String.format("%s.%s", namespace,methodName));
            /*Making Payload*/
            JSONObject objectForPayload = new JSONObject();
            objectForPayload.put(payloadKey, payloadValue);
            StringEntity stringentity = new StringEntity(objectForPayload.toString());
            httppost.setEntity(stringentity);
            response = client.execute(httppost);
            return response;


    }

All these headers that i am passing are correct and i have verified the same via inspect element in Google chrome or Firebug plugin if you are familiar with Mozilla.

Now the problem is that most of the time i am getting the readable data but sometimes i do get unreadable data.

I debugged using eclipse and noticed that the charset under wrappedEntity is showing as "US-ASCII". I am attaching a jpg for reference

Can someone please tell me how can i change the charset from ASCII to UTF-8 of the response before i do response = client.execute(httppost); . PS:As you have noticed that i am passing charset=utf-8 in the header and that i have already verified using firebug and google chrome that i am passing the exact headers .

Please zoom in to see the image more clearly

Thanks in advance

解决方案

i was able to resolve the issue just mentioning it for people that may face similar issue. after getting the response first get the entity by using HttpEntity entity = response.getEntity(); and since my response was a json object convert entity to string but using "UTF-8" something like this responseJsonObject = new JSONObject(EntityUtils.toString(entity,"UTF-8"));

previously i was just doing responseJsonObject = new JSONObject(EntityUtils.toString(entity));

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