RestTemplate调用三方接口获取数据时出现乱码的常见解决办法

查看响应数据的编码格式是否正确

• 若不正确可在RestTemplate注入spring容器时进行修改，如下

package com.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import java.nio.charset.Charset;

@Configuration
public class RestTemplateConfig {

    @Autowired
    private RestTemplateBuilder builder;
    
    @Bean
    public RestTemplate restTemplate() {
        RestTemplate restTemplate = builder.build();
        restTemplate.getMessageConverters().set(1,new StringHttpMessageConverter(Charset.forName("ISO-8859-1")));
        return restTemplate;
    }
    
}

• 或者直接修改返回的数据编码格式

dataStr=new String(dataStr.getBytes("UTF-8"),"ISO-8859-1");

查看接口返回的内容编码是否为gzip

• 若为gzip则进行解码，如下

    /**
     *
     * @param url 第三方接口
     * @return
     */
    private Weather doGetData(String url) {
        //头部信息定义end
        try {
            ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);

            if(response.getStatusCode() == HttpStatus.OK) {
                //开始gzip解码
                InputStream inWithCode = new ByteArrayInputStream(response.getBody().getBytes("ISO-8859-1"));
                GZIPInputStream gunzip = new GZIPInputStream(inWithCode);
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                byte[] buffer = new byte[256];
                int n;
                while ((n = gunzip.read(buffer))>= 0) {
                    out.write(buffer, 0, n);
                }
                //gzip解码结束
                String dataStr = out.toString();
                //将数据封装到WeatherResponse对象中
                WeatherResponse wr = new ObjectMapper().readValue(dataStr, WeatherResponse.class);
                if(wr.getStatus().equals("1000")) {
                    //返回响应数据
                    return wr.getData();
                }else {
                    throw new BusinessException("call weather api error");
                }
            }else {
                throw new BusinessException("call weather api error");
            }
        }catch(BusinessException e) {
            throw e;
        }catch(Exception e) {
            throw new BusinessException("call weather api error", e);
        }
    }