resttemplate设置params的方法

// 使用Map传参
Map<String, String> uriVariables = new HashMap<>();
uriVariables.put("id", "123");
String result = restTemplate.getForObject("http://example.com/api/{id}", String.class, uriVariables);
// 或使用可变参数
String result = restTemplate.getForObject("http://example.com/api/{id}", String.class, "123");

UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl("http://example.com/api/data")
    .queryParam("name", "John")
    .queryParam("age", 25);
String url = builder.toUriString();
String result = restTemplate.getForObject(url, String.class);

// 构建嵌套参数
Map<String, Object> paramMap = new HashMap<>();
Map<String, String> queryMap = new HashMap<>();
queryMap.put("c1", "value1");
paramMap.put("a", "valueA");
paramMap.put("b", queryMap);
// 设置请求头
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<Map<String, Object>> entity = new HttpEntity<>(paramMap, headers);
// 发送请求
String response = restTemplate.postForObject("http://example.com/api", entity, String.class);

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
MultiValueMap<String, String> formData = new LinkedMultiValueMap<>();
formData.add("username", "admin");
formData.add("password", "123456");
HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<>(formData, headers);
ResponseEntity<String> response = restTemplate.postForEntity("http://example.com/login", entity, String.class);

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setConnectTimeout(10000); // 10秒
        factory.setReadTimeout(10000);    // 10秒
        return new RestTemplate(factory);
    }
}

ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);
JSONObject jsonResponse = new JSONObject(response.getBody());
if ("0000".equals(jsonResponse.getJSONObject("parameter").getString("code"))) {
    String result = jsonResponse.getString("result");
}