import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import org.springframework.http.HttpEntity;import org.springframework.http.HttpHeaders;import org.springframework.http.MediaType;import org.springframework.http.client.SimpleClientHttpRequestFactory;import org.springframework.web.client.RestTemplate;import java.io.UnsupportedEncodingException;public class RestTemplateUtil {    private static Logger logger = LogManager.getLogger(RestTemplateUtil.class);    public String post(String reqParam, String url) {        // 核心返回结果报文字符串        String returnJson = "";        try {            //复杂构造函数的使用            SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();            requestFactory.setConnectTimeout(1000);// 设置超时            requestFactory.setReadTimeout(1000);            //利用复杂构造器可以实现超时设置，内部实际实现为 HttpClient            RestTemplate restTemplate = new RestTemplate(requestFactory);            //设置HTTP请求头信息，实现编码等            HttpHeaders headers = new HttpHeaders();            MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");            headers.setContentType(type);            headers.add("Accept", MediaType.APPLICATION_JSON.toString());            //利用容器实现数据封装，发送            HttpEntity
     
       entity = new HttpEntity
      
       (reqParam, headers);            returnJson = restTemplate.postForObject(url, entity, String.class);            // 转码原因：RestTemplate默认是使用org.springframework.http.converter.StringHttpMessageConverter来解析            // StringHttpMessageConverter 默认用的 ISO-8859-1来编码的            returnJson = new String(returnJson.getBytes("ISO-8859-1"), "utf-8");        } catch (UnsupportedEncodingException e) {            e.printStackTrace();            logger.info("----------------------------------------");            logger.info(returnJson);            logger.info("----------------------------------------");        }return returnJson;    }}