RestTemplate之中文乱码

最新推荐文章于 2025-09-18 11:35:14 发布

原创最新推荐文章于 2025-09-18 11:35:14 发布 · 2.8k 阅读

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#RestTemplate

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本文介绍了如何处理RESTTemplate中HTTP请求返回的中文乱码问题，提供了两种解决方案：一是通过重新编码已解码的字符串，二是替换默认的StringHttpMessageConverter。重点在于理解乱码产生的原因和适用的编码策略。

如下是一个正常的HTTP请求，返回信息中的中文是乱码

HttpHeaders httpHeaders = new HttpHeaders();
HttpEntity<Object> httpEntity = new HttpEntity<>(null, httpHeaders);
RestTemplate restTemplate = new RestTemplate();
String url = "https://www.baidu.com";
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
String body = responseEntity.getBody();
System.out.println(body);

解决方法

方法一

因为RestTemplate默认的String编码是ISO_8859_1，怎么得知默认编码的会在后面提到。可以重新使用utf-8解码一次

HttpHeaders httpHeaders = new HttpHeaders();
HttpEntity<Object> httpEntity = new HttpEntity<>(null, httpHeaders);
RestTemplate restTemplate = new RestTemplate();
String url = "https://www.baidu.com";
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
String body = responseEntity.getBody();
//使用utf-8重新解码
byte[] bytes = body.getBytes(StandardCharsets.ISO_8859_1);
body = new String(bytes, StandardCharsets.UTF_8);
System.out.println(body);

方法二

更换默认的StringHttpMessageConverterString转换器

HttpHeaders httpHeaders = new HttpHeaders();
HttpEntity<Object> httpEntity = new HttpEntity<>(null, httpHeaders);
//自定义转换器
ArrayList<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
StringHttpMessageConverter messageConverter = new StringHttpMessageConverter(StandardCharsets.UTF_8);
messageConverters.add(messageConverter);
//使用自定义转换器初始化RestTemplate
RestTemplate restTemplate = new RestTemplate(messageConverters);
String url = "https://www.baidu.com";
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
System.out.println(responseEntity.getStatusCode());
String body = responseEntity.getBody();
System.out.println(body);