如何在Resttemplate Spring中执行操作

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

RestTemplate restTemplate = new RestTemplate();

String url = "http://example.com/api/resource";
ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
String responseBody = response.getBody();

String url = "http://example.com/api/resource";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> requestEntity = new HttpEntity<>("requestBody", headers);
ResponseEntity<String> response = restTemplate.postForEntity(url, requestEntity, String.class);
String responseBody = response.getBody();

String url = "http://example.com/api/resource";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> requestEntity = new HttpEntity<>("requestBody", headers);
restTemplate.put(url, requestEntity);

String url = "http://example.com/api/resource";
restTemplate.delete(url);

ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
HttpStatus statusCode = response.getStatusCode();
HttpHeaders headers = response.getHeaders();
String responseBody = response.getBody();