如何从Spring RestTemplate中删除字符集？

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class Main {
    public static void main(String[] args) {
        RestTemplate restTemplate = new RestTemplate();

        // 创建HttpHeaders对象
        HttpHeaders headers = new HttpHeaders();
        // 设置Content-Type为application/json
        headers.set("Content-Type", "application/json");

        // 创建HttpEntity对象，将HttpHeaders对象作为参数传入
        HttpEntity<String> entity = new HttpEntity<>(headers);

        // 发送请求，并将HttpEntity对象作为参数传入
        ResponseEntity<String> response = restTemplate.exchange("http://example.com/api", HttpMethod.GET, entity, String.class);

        // 获取响应的状态码和响应体
        int statusCode = response.getStatusCodeValue();
        String responseBody = response.getBody();

        System.out.println("Status code: " + statusCode);
        System.out.println("Response body: " + responseBody);
    }
}