com.github.kevinsawicki

<dependency>
  <groupId>com.github.kevinsawicki</groupId>
  <artifactId>http-request</artifactId>
  <version>6.0</version> </dependency>

send body json
HttpRequest request = HttpRequest.post(url);
request.header("Content-Type", "application/json");
request.send(JsonStr);
System.out.println(h.ok());
System.out.println(h.body());

send body List<String> Str
HttpRequest request = HttpRequest.post(url);
Map<String, Object> formMaps=new HashMap<>();
formMaps.put("Str[0]", 0);
formMaps.put("Str[1]", 1);
request.form(formMaps);
System.out.println(h.ok());
System.out.println(h.body());