使用postForObject获取RestTemplate响应中的InputStream和JSON

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

RestTemplate restTemplate = new RestTemplate();

String url = "http://example.com/api/endpoint";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);

// 构造请求体
Map<String, Object> requestBody = new HashMap<>();
requestBody.put("key1", "value1");
requestBody.put("key2", "value2");

// 发送POST请求
HttpEntity<Map<String, Object>> requestEntity = new HttpEntity<>(requestBody, headers);
ResponseEntity<byte[]> responseEntity = restTemplate.postForEntity(url, requestEntity, byte[].class);

// 获取响应结果
byte[] responseBody = responseEntity.getBody();

// 获取InputStream
InputStream inputStream = new ByteArrayInputStream(responseBody);

// 获取JSON
String json = new String(responseBody, StandardCharsets.UTF_8);