RestTemplate StringHttpMessageConverter 中文乱码

解决方案

版本：org.springframework.boot:spring-boot-starter-web:2.1.6.RELEASE

import org.springframework.boot.web.client.RestTemplateBuilder; import org.springframework.context.annotation.Bean; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.web.client.RestTemplate; import java.nio.charset.StandardCharsets; @Bean public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { RestTemplate restTemplate = restTemplateBuilder.build(); restTemplate.getMessageConverters().forEach(httpMessageConverter -> { if (httpMessageConverter instanceof StringHttpMessageConverter) { ((StringHttpMessageConverter) httpMessageConverter).setDefaultCharset(StandardCharsets.UTF_8); } }); return restTemplate; }

问题原因

版本：org.springframework:spring-web:5.1.8.RELEASE

org.springframework.web.client.RestTemplate

import org.springframework.http.converter.StringHttpMessageConverter; /** * Create a new instance of the {@link RestTemplate} using default settings. * Default {@link HttpMessageConverter HttpMessageConverters} are initialized. */ public RestTemplate() { {...} this.messageConverters.add(new StringHttpMessageConverter()); {...} }

org.springframework.http.converter.StringHttpMessageConverter

import java.nio.charset.StandardCharsets; /** * Thedefault charset used by the converter. */ public static final Charset DEFAULT_CHARSET = StandardCharsets.ISO_8859_1; /** * A default constructor that uses {@code "ISO-8859-1"} as the default charset. * @see #StringHttpMessageConverter(Charset) */ public StringHttpMessageConverter() { this(DEFAULT_CHARSET); }

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