httpclient post raw json body
Poor Man
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How to make a HTTP POST request with raw JSON body using HttpClient in Java?#
If you want to make a HTTP POST request with raw JSON body using HttpClient in Java, you can do this in several ways:
Method 1: Using StringEntity#
One way is to use StringEntity class provided by HttpClient. Here is the code:
Text
// Create HttpClient instance
HttpClient client = HttpClientBuilder.create().build();
// Set URL
HttpPost httpPost = new HttpPost("http://example.com/api/resource");
// Set headers
httpPost.setHeader("Content-Type", "application/json");
// Set request body
String jsonBody = "{\"key\": \"value\"}";
StringEntity entity = new StringEntity(jsonBody);
httpPost.setEntity(entity);
// Execute HTTP POST request
HttpResponse response = client.execute(httpPost);
Method 2: Using JSONObject#
Another way is to use JSONObject class from JSON library. Here is the code:
Text
// Create HttpClient instance
HttpClient client = HttpClientBuilder.create().build();
// Set URL
HttpPost httpPost = new HttpPost("http://example.com/api/resource");
// Set headers
httpPost.setHeader("Content-Type", "application/json");
// Set request body
JSONObject jsonBody = new JSONObject();
jsonBody.put("key", "value");
StringEntity entity = new StringEntity(jsonBody.toString());
httpPost.setEntity(entity);
// Execute HTTP POST request
HttpResponse response = client.execute(httpPost);
Method 3: Using Gson#
A third way is to use Gson library which provides a convenient way to serialize Java objects to JSON and vice versa. Here is the code:
Text
// Create HttpClient instance
HttpClient client = HttpClientBuilder.create().build();
// Set URL
HttpPost httpPost = new HttpPost("http://example.com/api/resource");
// Set headers
httpPost.setHeader("Content-Type", "application/json");
// Set request body
Gson gson = new Gson();
Map<String, String> jsonBody = new HashMap<>();
jsonBody.put("key", "value");
String json = gson.toJson(jsonBody);
StringEntity entity = new StringEntity(json);
httpPost.setEntity(entity);
// Execute HTTP POST request
HttpResponse response = client.execute(httpPost);