使用 jersey 客户端将 JSON 响应作为字符串读取
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reading JSON response as string using jersey client
提问by Sudhir
I am using jersey client to post a file to a REST URI that returns response as json. My requirement is to read the response as is(json) to a string.
我正在使用 jersey 客户端将文件发布到 REST URI，该 URI 将响应作为 json 返回。我的要求是按原样（json）读取字符串的响应。
Here is the piece of code that posts the data to web service.
这是将数据发布到 Web 服务的一段代码。
final ClientResponse clientResp = resource.type(
MediaType.MULTIPART_FORM_DATA_TYPE).
accept(MediaType.APPLICATION_JSON).
post(ClientResponse.class, inputData);
System.out.println("Response from news Rest Resource : " + clientResp.getEntity(String.class)); // This doesnt work.Displays nothing.
clientResp.getLength() has 281 bytes which is the size of the response, but clientResp.getEntity(String.class) returns nothing.
clientResp.getLength() 有 281 个字节，这是响应的大小，但 clientResp.getEntity(String.class) 什么都不返回。
Any ideas what could be incorrect here?
任何想法在这里可能不正确？
回答by Sudhir
I was able to find solution to the problem. Just had to call bufferEntity method before getEntity(String.class). This will return response as string.
我能够找到问题的解决方案。只需要在 getEntity(String.class) 之前调用 bufferEntity 方法。这将以字符串形式返回响应。
clientResp.bufferEntity();
String x = clientResp.getEntity(String.class);
回答by Marcio Jasinski
Although the above answer is correct, using Jersey API v2.7 it is slightly different with Response:
虽然上面的答案是正确的，但使用 Jersey API v2.7 它与Response以下略有不同：
Client client = ClientBuilder.newClient();
WebTarget target = client.target("http://localhost:8080");
Response response = target.path("api").path("server").path("ping").request(MediaType.TEXT_PLAIN_TYPE).get();
System.out.println("Response: " + response.getStatus() + " - " + response.readEntity(String.class));
回答by dvlcube
In my case I'm using Jersey 1.19 and Genson got in my classpath somehow? So the accepted answer throws com.owlike.genson.stream.JsonStreamException: Readen value can not be converted to String.
就我而言，我使用的是 Jersey 1.19，而 Genson 以某种方式进入了我的类路径？所以接受的答案抛出com.owlike.genson.stream.JsonStreamException: Readen value can not be converted to String.
My solution was to read directly from the response stream:
我的解决方案是直接从响应流中读取：
private String responseString(com.sun.jersey.api.client.ClientResponse response) {
InputStream stream = response.getEntityInputStream();
StringBuilder textBuilder = new StringBuilder();
try (Reader reader = new BufferedReader(new InputStreamReader(stream, Charset.forName(StandardCharsets.UTF_8.name())))) {
int c = 0;
while ((c = reader.read()) != -1) {
textBuilder.append((char) c);
}
return textBuilder.toString();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
回答by Ian Lim
If you still got problem with this, you may want to consider to use rest-assured
如果您仍然对此有疑问，您可能需要考虑使用rest-assured
