如何使用RestTemplate打印json post主体

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class RestTemplateExample {
    public static void main(String[] args) {
        // 创建RestTemplate实例
        RestTemplate restTemplate = new RestTemplate();

        // 创建请求体
        String jsonBody = "{\"name\":\"John\",\"age\":30}";
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<String> requestEntity = new HttpEntity<>(jsonBody, headers);

        // 发送POST请求
        ResponseEntity<String> responseEntity = restTemplate.postForEntity("http://example.com/api", requestEntity, String.class);

        // 处理响应体
        String responseBody = responseEntity.getBody();
        System.out.println(responseBody);
    }
}