RestTemplate进行httpPost访问

通过RestTemplate访问实现了代码优雅简介的访问http请求，去掉了通过httplient繁琐的流程

import com.alibaba.fastjson.JSON;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.boot.web.client.RestTemplateBuilder;

import org.springframework.http.HttpEntity;

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;

import org.springframework.http.converter.StringHttpMessageConverter;

import org.springframework.util.CollectionUtils;

import org.springframework.web.client.RestTemplate;

import java.nio.charset.Charset;

import java.util.HashMap;

import java.util.Map;

/**

* restTemplate包装工具

*

* @author lichuang

* @since 2018-04-05

*/

public class RestTemplateUtil {

private static final Logger logger = LoggerFactory.getLogger(RestTemplateUtil.class);

private static final String CHARSET_NAME = "UTF-8";

private static final String MEDIA_TYPE = "application/json; charset=UTF-8";

/**

*

* @param url 请求URL地址

* @param paramMap 请求参数

* @param clazz 需要返回的类型

* @param 需要返回的包装类型泛型

* @return

*/

public static T httpPost(String url, Map paramMap, Class clazz) {

if (CollectionUtils.isEmpty(paramMap)) {

paramMap = new HashMap<>();

}

String jsonParam = JSON.toJSONString(paramMap);

StringHttpMessageConverter messageConverter = new StringHttpMessageConverter(Charset.forName(CHARSET_NAME));

RestTemplate restTemplate = new RestTemplateBuilder().additionalMessageConverters(messageConverter).build();

HttpHeaders headers = new HttpHeaders();

MediaType type = MediaType.parseMediaType(MEDIA_TYPE);

headers.setContentType(type);

HttpEntity entity = new HttpEntity(jsonParam,headers);

try {

String result = restTemplate.postForObject(url, entity, String.class);

return JSON.parseObject(result,clazz);

} catch (Exception e) {

logger.error("远程http请求发生异常：url:{}，jsonParm:{},exception:{}",url,jsonParam,e);

return null;

}

}

}