如何使用Apache HttpClient发布JSON请求？
如何使用Apache HttpClient发布JSON请求？
提问于 2012-08-22 00:31:25
我有一些类似以下的东西：
final String url = "http://example.com";
final HttpClient httpClient = new HttpClient();
final PostMethod postMethod = new PostMethod(url);
postMethod.addRequestHeader("Content-Type", "application/json");
postMethod.addParameters(new NameValuePair[]{
new NameValuePair("name", "value)
});
httpClient.executeMethod(httpMethod);
postMethod.getResponseBodyAsStream();
postMethod.releaseConnection();它总是带着500分回来。服务提供商说我需要发送JSON。Apache HttpClient 3.1+是如何做到这一点的？
回答 1
Stack Overflow用户
发布于 2022-01-29 02:33:37
我使用JACKSON库将对象转换为JSON并设置请求主体，如下所示。下面是完整的示例。
try (CloseableHttpClient httpclient = HttpClients.createDefault()) {
HttpPost httpPost = new HttpPost("https://jsonplaceholder.typicode.com/posts");
Post post = new Post("foo", "bar", 1);
ObjectWriter ow = new ObjectMapper().writer();
String strJson = ow.writeValueAsString(post);
System.out.println(strJson);
StringEntity strEntity = new StringEntity(strJson, ContentType.APPLICATION_JSON);
httpPost.setEntity(strEntity);
httpPost.setHeader("Content-type", "application/json");
try (CloseableHttpResponse response = httpclient.execute(httpPost)) {
System.out.println(response.getCode() + " " + response.getReasonPhrase());
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);
System.out.println(result);
EntityUtils.consume(entity);
} catch (ParseException e) {
e.printStackTrace();
}
} catch (IOException e) {
System.out.println(e.getMessage());
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12059278
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