利用Resttemplate进行put请求

开发中，最常用的是post、get这两种。今天我给大家展示一个利用put请求的demo，其实put请求跟post请求没啥区别，但是没有返回值。

void put(String var1, @Nullable Object var2, Object... var3) throws RestClientException;

    void put(String var1, @Nullable Object var2, Map<String, ?> var3) throws RestClientException;

    void put(URI var1, @Nullable Object var2) throws RestClientException;

下面就是demo（表现层代码就不写在这里了，业务逻辑层的代码给大家展示）。

 package com.ecshop.service.impl;

 import com.alibaba.fastjson.JSON;
 import com.ecshop.common.dto.CreateOrderRequestDTO;
 import com.ecshop.common.dto.OrderDto;
 import com.ecshop.common.enums.ECShopErrorCodeEnum;
 import com.ecshop.common.request.OrderCancelRequest;
 import com.ecshop.common.util.ErrorResultInstallUtils;
 import com.ecshop.service.OrderService;
 import com.ecshop.service.client.PhpClient;
 import com.ecshop.service.client.dto.request.OrderRequestDTO;
 import com.ecshop.service.client.dto.response.BaseResponseDTO;
 import com.ecshop.service.client.dto.response.OrderResponseDTO;
 import lombok.extern.slf4j.Slf4j;
 import org.dozer.DozerBeanMapper;
 import org.dozer.Mapper;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestTemplate;
 import result.Result;

 import java.util.Objects;

 /**
  * @Author: zp
  * @Date: 2019/4/16 17:20
  * @Description:
  */
 @Slf4j
 @Service
 public class OrderServiceImpl implements OrderService {

     private static final String Order_Cancel_Url = "http://localhost:10002";

     @Autowired
     private RestTemplate restTemplate;

     @Override
     public Result cancelOrder(OrderDto dto) {
         Result result = Result.success();
         String merSn = dto.getMerSn();
         OrderCancelRequest request = new OrderCancelRequest();
         BeanUtils.copyProperties(dto,request);
         log.info("取消订单请求实体类:"+JSON.toJSON(request));
         String jsonObj = JSON.toJSONString(request);
         HttpHeaders headers = new HttpHeaders();
         headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
         HttpEntity<String> httpEntity = new HttpEntity(jsonObj,headers);
         String requestUrl = Order_Cancel_Url+"/order/{merSn}/cancel";
         log.info("取消订单请求Url:"+requestUrl);
         try {
             restTemplate.put(requestUrl,httpEntity,merSn);
         }catch (Exception e){
             log.error("订单取消失败",e);
             return Result.fail("订单取消失败,请联系客服人员");
         }
         return result;
     }

 }