<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
    </dependency>
</dependencies>

public class MyData {
    @JsonProperty("name")
    private String name;

    @JsonProperty("age")
    private int age;

    // 省略getter和setter方法
}

RestTemplate restTemplate = new RestTemplate();

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);

MyData data = new MyData();
data.setName("John");
data.setAge(25);

HttpEntity<MyData> request = new HttpEntity<>(data, headers);

String url = "http://example.com/api/endpoint";
ResponseEntity<String> response = restTemplate.postForEntity(url, request, String.class);