SpringBoot 使用 RestTemplate 调用exchange方法 显示错误信息

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.ResponseErrorHandler;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.nio.charset.Charset;

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate getRestTemplate(ClientHttpRequestFactory factory) {
        RestTemplate restTemplate = new RestTemplate(factory);

        restTemplate.getMessageConverters().set(1,
                new StringHttpMessageConverter(Charset.forName("UTF-8")));

        restTemplate.setErrorHandler(new ThrowErrorHandler());

        return restTemplate;
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(10000);//单位为ms
        factory.setConnectTimeout(5000);//单位为ms
        return factory;
    }

    public class ThrowErrorHandler implements ResponseErrorHandler {

        @Override
        public boolean hasError(ClientHttpResponse response) throws IOException {
            //返回false表示不管response的status是多少都返回没有错
            //这里可以自己定义那些status code你认为是可以抛Error
            return false;
        }

        @Override
        public void handleError(ClientHttpResponse response) throws IOException {
            System.out.println("================>" + response.getBody());
            //这里面可以实现你自己遇到了Error进行合理的处理
        }
    }

}