如何使用RestTemplate进行PUT

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
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对象
        RestTemplate restTemplate = new RestTemplate();

        // 构建请求URL
        String url = "http://example.com/api/resource";

        // 构建请求体
        String requestBody = "{\"name\": \"John\", \"age\": 30}";

        // 设置请求头
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);

        // 构建HttpEntity对象
        HttpEntity<String> entity = new HttpEntity<>(requestBody, headers);

        // 发送PUT请求
        ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.PUT, entity, String.class);

        // 处理响应
        if (response.getStatusCode().is2xxSuccessful()) {
            String responseBody = response.getBody();
            System.out.println("PUT request successful. Response: " + responseBody);
        } else {
            System.out.println("PUT request failed. Status code: " + response.getStatusCodeValue());
        }
    }
}