强制Spring RestTemplate忽略响应的内容类型标头

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.AbstractHttpMessageConverter;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class CustomRestTemplate {

    public static void main(String[] args) {
        // 创建自定义的RestTemplate实例
        RestTemplate restTemplate = createCustomRestTemplate();

        // 发送HTTP请求并处理响应
        String url = "http://example.com/api/endpoint";
        String response = restTemplate.getForObject(url, String.class);
        System.out.println(response);
    }

    private static RestTemplate createCustomRestTemplate() {
        // 创建自定义的HttpMessageConverter
        HttpMessageConverter<String> customConverter = new AbstractHttpMessageConverter<String>() {
            @Override
            protected boolean canRead(MediaType mediaType) {
                // 指示该转换器可以处理所有类型的响应内容
                return true;
            }

            @Override
            protected String readInternal(Class<? extends String> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
                // 将响应内容转换为String类型
                InputStream inputStream = inputMessage.getBody();
                // TODO: 进行自定义的响应内容处理
                return null;
            }
        };

        // 创建RestTemplate实例并添加自定义的HttpMessageConverter
        List<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
        messageConverters.add(customConverter);
        messageConverters.add(new MappingJackson2HttpMessageConverter()); // 添加其他默认的转换器

        return new RestTemplate(messageConverters);
    }
}