[开发工具]no suitable HttpMessageConverter found for response type [class java.lang.Object] and content type..

java使用restTemplate报错：

org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class java.lang.Object] and content type [text/plain;charset=utf-8]

报错的代码：

 ParameterizedTypeReference<Map<String,Object>> reference = new ParameterizedTypeReference<Map<String,Object>>(){};
ResponseEntity<Map<String,Object>> result = restTemplate.exchange(url,HttpMethod.GET,null,reference);

捕捉到的异常提示，因为没有响应类型Object和content type [text/plain;charset=utf-8]匹配的HttpMessageConverter，所以无法提取响应，看代码是用Map<String,Object>来接收的响应，而[text/plain;charset=utf-8]是纯文本，因此将我们的接收类型换为String即可，如果有需要可以之后再手动转换为JSON。更正后代码：

import com.alibaba.fastjson.JSONObject;
import org.springframework.core.ParameterizedTypeReference;

ParameterizedTypeReference<String> reference = new ParameterizedTypeReference<String>(){};
ResponseEntity<String> result = restTemplate.exchange(url, HttpMethod.GET,null,reference);
String obj = result.getBody();
JSONObject jsonObject = JSONObject.parseObject(responseBody);

响应正常接收：

“Message”: “deviceNo {deviceNo} not exist!”,
“Content”: “”,
“Success”: false