如何在Spring Boot中使用RestTemplate将JSON作为输入参数从一个微服务发送到另一个微服务

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

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

@Autowired
private RestTemplate restTemplate;

public void sendRequest() {
    String targetUrl = "http://target-service-url";
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);

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

    // 发送POST请求
    ResponseEntity<String> response = restTemplate.postForEntity(targetUrl, new HttpEntity<>(requestBody, headers), String.class);

    // 处理响应结果
    if (response.getStatusCode() == HttpStatus.OK) {
        String responseBody = response.getBody();
        // 处理响应数据
    } else {
        // 处理请求失败情况
    }
}