解决RestTemplate加@Autowired注入不了的问题

import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;
 
@Configuration
public class RedisConfig {
   @Bean
   public RestTemplate restTemplate(RestTemplateBuilder builder) {
      RestTemplate restTemplate = builder.build();
      restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
      return restTemplate;
   }
}

@Autowired
private RestTemplate restTemplate;

String url = "http://localhost:8080/findById?id=1";//请求的地址
String request = restTemplate.getForObject(url, String.class);