利用Resttemplate进行put请求

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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;

     }

 }