如何使用Spring RestTemplate将&符号作为参数值的一部分进行传递

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;
import java.net.URLEncoder;

RestTemplate restTemplate = new RestTemplate();

MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
params.add("param1", "value1");
params.add("param2", "value2&value3");

String encodedParam2 = URLEncoder.encode(params.getFirst("param2"), "UTF-8");
params.set("param2", encodedParam2);

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

HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);

String url = "http://example.com/api";
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
String response = responseEntity.getBody();