问题背景

feignclient的本质其实也是http调用，只是进行了封装，通过nacos可以进行服务名调用，并且可以使用负载均衡，除了使用注解@FeignClient进行feign调用，也可以使用RestTemplate进行调用，本篇介绍使用RestTemplate进行调用feign
注意事项：

版本的依赖兼容很重要，不然会报错
默认已安装nacos
可以复制代码自己创建工程，也可以下载源码进行参考

项目搭建

1 引入pom依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.3.1.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.yg</groupId><artifactId>resttemplate</artifactId><version>0.0.1-SNAPSHOT</version><name>resttemplate</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--StringUtils RandomStringUtils--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.12.0</version></dependency><!--Lists Maps--><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>31.0.1-jre</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.13</version><exclusions><exclusion><artifactId>commons-codec</artifactId><groupId>commons-codec</groupId></exclusion></exclusions></dependency><!--Feign LoadBalanced--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId><version>2.2.5.RELEASE</version><exclusions><exclusion><artifactId>spring-cloud-context</artifactId><groupId>org.springframework.cloud</groupId></exclusion><exclusion><artifactId>archaius-core</artifactId><groupId>com.netflix.archaius</groupId></exclusion><exclusion><artifactId>jsr305</artifactId><groupId>com.google.code.findbugs</groupId></exclusion></exclusions></dependency><!--MapUtils--><dependency><groupId>commons-collections</groupId><artifactId>commons-collections</artifactId><version>3.2.2</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.62</version></dependency><!--注册中心--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-nacos-discovery</artifactId><version>2.2.0.RELEASE</version><exclusions><exclusion><artifactId>guava</artifactId><groupId>com.google.guava</groupId></exclusion><exclusion><artifactId>HdrHistogram</artifactId><groupId>org.hdrhistogram</groupId></exclusion><exclusion><artifactId>spring-cloud-commons</artifactId><groupId>org.springframework.cloud</groupId></exclusion><exclusion><artifactId>commons-codec</artifactId><groupId>commons-codec</groupId></exclusion><exclusion><artifactId>commons-lang3</artifactId><groupId>org.apache.commons</groupId></exclusion><exclusion><artifactId>httpclient</artifactId><groupId>org.apache.httpcomponents</groupId></exclusion><exclusion><artifactId>spring-cloud-starter</artifactId><groupId>org.springframework.cloud</groupId></exclusion></exclusions></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>

2 添加bootstrap连接注册中心

server:port: ${SERVER_PORT:1994}spring:application:name: resttemplate-feigncloud:nacos:discovery:server-addr: ${REGISTER_HOST:10.10.196.247}:${REGISTER_PORT:8848}config:server-addr: ${REGISTER_HOST:10.10.196.247}:${REGISTER_PORT:8848}file-extension: yml

3 RestTemplate配置类

package com.yg.resttemplate.config;import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;/*** @Author suolong* @Date 2022/5/30 21:53* @Version 2.0*/
@Configuration
public class RestTemplateConfig {@Bean@LoadBalanced //添加该注解，可以直接通过服务名找到对应的IP地址public RestTemplate restTemplate() {return new RestTemplate();}
}

4 启动类，需要使能feign

package com.yg.resttemplate;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.openfeign.EnableFeignClients;@EnableFeignClients
@EnableConfigurationProperties
@SpringBootApplication
public class ResttemplateApplication {public static void main(String[] args) {SpringApplication.run(ResttemplateApplication.class, args);}}

5 http工具类

package com.yg.resttemplate.utils;import com.alibaba.fastjson.JSONObject;
import com.google.common.collect.Lists;
import com.yg.resttemplate.plugins.CustomJacksonHttpMessageConverter;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.stereotype.Service;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.springframework.web.client.RestTemplate;import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.*;@Slf4j
@Service
public class HttpClientPoolUtils implements InitializingBean {private PoolingHttpClientConnectionManager poolConnManager;private RequestConfig requestConfig;private CloseableHttpClient httpClient;/*** Spring封装的http请求对象。*/private static RestTemplate restTemplate;/*** 并发控制锁对象。*/private static final Object LOCK_REST_TEMPLATE = new Object();// region 获取全局对象/*** 获取Spring封装的http请求对象。** @return http请求对象。*/@Bean@LoadBalancedprivate static RestTemplate getRestTemplate() {if (null == restTemplate) {synchronized (LOCK_REST_TEMPLATE) {if (null == restTemplate) {// endregionrestTemplate = new RestTemplate();restTemplate.setErrorHandler(new DefaultResponseErrorHandler() {/*** 返回的状态不等于200,不抛出异常** @param response* @throws IOException*/@Overridepublic void handleError(ClientHttpResponse response) throws IOException {}/*** 忽略非200错误** @param response*/@Overridepublic boolean hasError(ClientHttpResponse response) throws IOException {return true;}});// 替换默认的 Jackson 消息转换器实现List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters();Iterator<HttpMessageConverter<?>> iterator = messageConverters.iterator();while (iterator.hasNext()) {HttpMessageConverter<?> next = iterator.next();if (next instanceof MappingJackson2HttpMessageConverter) {iterator.remove();break;}}messageConverters.add(new CustomJacksonHttpMessageConverter());}}}return restTemplate;}// endregionprivate static void config(HttpRequestBase httpRequestBase, Map<String, Object> header) {RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(20000).setConnectTimeout(20000).setSocketTimeout(20000).build();httpRequestBase.addHeader("Content-Type", "application/json;charset=UTF-8");if (MapUtils.isNotEmpty(header)) {for (Map.Entry<String, Object> entry : header.entrySet()) {httpRequestBase.addHeader(entry.getKey(), String.valueOf(entry.getValue()));}}httpRequestBase.setConfig(requestConfig);}private void initPool() {try {restTemplate = getRestTemplate();SSLContextBuilder builder = new SSLContextBuilder();builder.loadTrustMaterial(null, new TrustSelfSignedStrategy());SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(builder.build());Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", sslsf).build();poolConnManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);poolConnManager.setMaxTotal(500);poolConnManager.setDefaultMaxPerRoute(500);int socketTimeout = 1200000;int connectTimeout = 100000;int connectionRequestTimeout = 100000;requestConfig = RequestConfig.custom().setConnectionRequestTimeout(connectionRequestTimeout).setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();httpClient = getConnection();} catch (NoSuchAlgorithmException | KeyStoreException | KeyManagementException e) {e.printStackTrace();}}private CloseableHttpClient getConnection() {CloseableHttpClient httpClient = HttpClients.custom().setConnectionManager(poolConnManager).setDefaultRequestConfig(requestConfig).setRetryHandler(new DefaultHttpRequestRetryHandler(2, false)).build();return httpClient;}public String postForForm(String url, Map<String, String> reqMap) {long start = System.currentTimeMillis();CloseableHttpResponse response = null;String result = StringUtils.EMPTY;HttpPost httpPost = null;try {// 创建httpPosthttpPost = new HttpPost(url);httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded");ArrayList<NameValuePair> nameValuePairs = new ArrayList<>();for (Map.Entry<String, String> entry : reqMap.entrySet()) {nameValuePairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));}httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));//发送post请求response = httpClient.execute(httpPost);if (null == response) {return "请求撞库平台异常";}if (null != response.getStatusLine() && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {result = EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8);return result;} else {log.error("bad response, result: {}", EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8));}} catch (Exception e) {log.error("=============[\"异常\"]======================", e);} finally {if (response != null) {try {response.close();} catch (IOException e) {e.printStackTrace();}}}return result;}public String postRestTemplateForm(String url, MultiValueMap<String, String> params, JSONObject header) {try {HttpHeaders headers = new HttpHeaders();List<String> values = Lists.newArrayList();values.add("application/x-www-form-urlencoded");values.add(String.format("multipart/form-data;boundary=%s", RandomStringUtils.randomNumeric(14)));headers.put("Content-Type", values);List<MediaType> mediaTypeList = new ArrayList<>();mediaTypeList.add(MediaType.ALL);headers.setAccept(mediaTypeList);org.springframework.http.HttpEntity<MultiValueMap<String, String>> requestEntity = new org.springframework.http.HttpEntity<>(params, headers);ResponseEntity<JSONObject> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, JSONObject.class);if (null != response.getBody()) {return response.getBody().toJSONString();}} catch (Exception ex) {ex.printStackTrace();log.error("resttemplate表单提交失败:{}", ex.getLocalizedMessage());}return null;}public String postRestTemplateJson(String url, String jsonStr, Map<String, Object> headerMap) {try {HttpHeaders headers = new HttpHeaders();if (MapUtils.isNotEmpty(headerMap)) {for (Map.Entry<String, Object> entry : headerMap.entrySet()) {final String key = entry.getKey();final String value = (String) entry.getValue();if (StringUtils.isAnyEmpty(key, value)) {continue;}headers.add(key, value);}}MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");headers.setContentType(type);headers.add("Accept", MediaType.APPLICATION_JSON.toString());// headers.add("GlobalId", globalId);org.springframework.http.HttpEntity<String> requestEntity = new org.springframework.http.HttpEntity<>(jsonStr, headers);return Objects.requireNonNull(restTemplate.postForObject(url, requestEntity, String.class));} catch (Exception ex) {log.error("resttemplate表单提交失败:{}", ex.getLocalizedMessage());}return null;}public String restTemplateMock(String url, String jsonStr) {String response = restTemplate.postForObject(url, jsonStr, String.class);log.info("response={}", response);return response;}public String postForJson(String url, String jsonStr, Map<String, Object> headerMap) {long start = System.currentTimeMillis();CloseableHttpResponse response = null;try {// 创建httpPostHttpPost httpPost = new HttpPost(url);if (MapUtils.isNotEmpty(headerMap)) {for (Map.Entry<String, Object> entry : headerMap.entrySet()) {final String key = entry.getKey();final String value = (String) entry.getValue();if (StringUtils.isAnyEmpty(key, value)) {continue;}httpPost.setHeader(key, value);}}httpPost.setHeader("Accept", "application/json");StringEntity entity = new StringEntity(jsonStr, "UTF-8");entity.setContentType("application/json");entity.setContentEncoding(new BasicHeader("Content-Type", "application/json"));httpPost.setEntity(entity);//发送post请求response = httpClient.execute(httpPost);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {String result = EntityUtils.toString(response.getEntity());log.debug("request success cost = {}， result = {}", System.currentTimeMillis() - start, result);return result;} else {log.error("bad response: {}", JSONObject.parseObject(EntityUtils.toString(response.getEntity())));}} catch (Exception e) {log.error("=============[\"异常\"]======================, e: {}", e);} finally {if (response != null) {try {response.close();} catch (IOException e) {e.printStackTrace();}}}return null;}public String post(String url, String jsonStr) {log.debug("url = " + url + " ,  json = " + jsonStr);long start = System.currentTimeMillis();CloseableHttpResponse response = null;String result = StringUtils.EMPTY;try {// 创建httpPostHttpPost httpPost = new HttpPost(url);httpPost.setHeader("Accept", "application/json");StringEntity entity = new StringEntity(jsonStr, "UTF-8");entity.setContentType("application/json");entity.setContentEncoding(new BasicHeader("Content-Type", "application/json"));httpPost.setEntity(entity);//发送post请求response = httpClient.execute(httpPost);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {result = EntityUtils.toString(response.getEntity());log.debug("request success cost = {}， result = {}", System.currentTimeMillis() - start, result);return result;} else {log.error("bad response, result: {}", EntityUtils.toString(response.getEntity()));}} catch (Exception e) {log.error("=============[\"异常\"]======================, e: {}", e);} finally {if (response != null) {try {response.close();} catch (IOException e) {e.printStackTrace();}}}return result;}public String get(String url) {HttpGet httpGet = new HttpGet(url);config(httpGet, null);return getResponse(httpGet);}public String getWithHeader(String url, Map<String, Object> header) {HttpGet httpGet = new HttpGet(url);config(httpGet, header);return getResponse(httpGet);}private String getResponse(HttpRequestBase request) {CloseableHttpResponse response = null;try {response = httpClient.execute(request,HttpClientContext.create());HttpEntity entity = response.getEntity();String result = EntityUtils.toString(entity, "UTF-8");EntityUtils.consume(entity);return result;} catch (IOException e) {log.error("send http error", e);return "";} finally {try {if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}}}public JSONObject postForJsonObject(String url, String jsonStr) throws Exception {log.debug("url = " + url + " ,  json = " + jsonStr);long start = System.currentTimeMillis();// 创建httpPostHttpPost httpPost = new HttpPost(url);httpPost.setHeader("Accept", "application/json");StringEntity entity = new StringEntity(jsonStr, "UTF-8");entity.setContentType("application/json");entity.setContentEncoding(new BasicHeader("Content-Type", "application/json"));httpPost.setEntity(entity);//发送post请求CloseableHttpResponse response = httpClient.execute(httpPost);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {JSONObject result = JSONObject.parseObject(EntityUtils.toString(response.getEntity()));log.debug("request success cost = {}， result = {}", System.currentTimeMillis() - start, result);return result;} else {log.error("bad response: {}", JSONObject.parseObject(EntityUtils.toString(response.getEntity())));}return null;}@Overridepublic void afterPropertiesSet() throws Exception {initPool();}}

6 测试controller，get和post接口

package com.yg.resttemplate.controller;import com.alibaba.fastjson.JSON;
import com.yg.resttemplate.service.RestTemplateService;
import com.yg.resttemplate.utils.HttpClientPoolUtils;
import lombok.extern.slf4j.Slf4j;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;/*** @Author suolong* @Date 2022/5/30 21:36* @Version 2.0*/
@Slf4j
@RestController
@RequestMapping("resttemplate")
public class RestTemplateController {@AutowiredRestTemplateService restTemplateService;@AutowiredHttpClientPoolUtils httpClientPoolUtils;@GetMapping("/getRestTemplateTest")public String getRestTemplateTest() {log.info("I am getRestTemplateTest");return "I am getRestTemplateTest";}@PostMapping("/postRestTemplateTest")public String postRestTemplateTest(@RequestBody String msg) {String res = "I am postRestTemplateTest " + msg;log.info(res);return res;}@PostMapping("/select")public String select(@RequestParam Integer number) {String res = null;switch (number) {case 1:res = restTemplateService.restTemplateGet1();break;case 2:res = restTemplateService.restTemplatePost1();break;case 3:res = restTemplateService.restTemplateGet2();break;case 4:res = restTemplateService.restTemplatePost2();break;case 5:res = restTemplateService.restTemplateGet3();break;case 6:res = restTemplateService.restTemplatePost3();break;case 7:res = httpClientPoolUtils.postRestTemplateJson("http://resttemplate-feign/resttemplate/postRestTemplateTest", "I am yuange", null);break;}log.info(res);return res;}
}

7 转换插件

package com.yg.resttemplate.plugins;import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.http.MediaType;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;import java.util.ArrayList;
import java.util.List;public class CustomJacksonHttpMessageConverter extends MappingJackson2HttpMessageConverter {public CustomJacksonHttpMessageConverter() {this(Jackson2ObjectMapperBuilder.json().build());}public CustomJacksonHttpMessageConverter(ObjectMapper objectMapper) {super(objectMapper);// 这里是重点，增加支持的类型，看你的情况加// 我这里目前只需要加个 TEXT/PLAINList<MediaType> mediaTypes = new ArrayList<>();mediaTypes.add(MediaType.ALL);setSupportedMediaTypes(mediaTypes);}
}

8 各种http测试方法

package com.yg.resttemplate.service;import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.client.RestTemplate;import java.util.HashMap;
import java.util.Map;/*** @Author suolong* @Date 2022/5/30 21:31* @Version 2.0*/
@Slf4j
@Service
public class RestTemplateService {@Autowiredprivate LoadBalancerClient loadBalancerClient;@Autowiredprivate RestTemplate restTemplate;public String restTemplateGet1() {// 新建对象RestTemplate restTemplate = new RestTemplate();String response = restTemplate.getForObject("http://localhost:1994/resttemplate/getRestTemplateTest", String.class);log.info("response: {}", response);return response;}public String restTemplatePost1() {// 新建对象RestTemplate restTemplate = new RestTemplate();//请求目标地址String requestMsg = "方式一 POST 请求";String response = restTemplate.postForObject("http://localhost:1994/resttemplate/postRestTemplateTest", requestMsg, String.class);log.info("response: {}", response);return response;}public String restTemplateGet2() {// 获取IP地址ServiceInstance choose = loadBalancerClient.choose("resttemplate-feign");String url = String.format("http://%s:%s", choose.getHost(), choose.getPort() + "/resttemplate/getRestTemplateTest");log.info("url: {}", url);RestTemplate restTemplate = new RestTemplate();String response = restTemplate.getForObject(url, String.class);log.info("response: {}", response);return response;}public String restTemplatePost2() {// 获取IP地址ServiceInstance choose = loadBalancerClient.choose("resttemplate-feign");// 组装URLString url = String.format("http://%s:%s", choose.getHost(), choose.getPort() + "/resttemplate/postRestTemplateTest");RestTemplate restTemplate = new RestTemplate();String requestMsg = "方式二 POST loadBalancerClient";String response = restTemplate.postForObject(url, requestMsg, String.class);log.info("response: {}", response);return response;}public String restTemplateGet3() {String requestMsg = "方式三 GET";String response = restTemplate.getForObject("http://resttemplate-feign/resttemplate/getRestTemplateTest", String.class);log.info("response: {}", response);return response;}public String restTemplatePost3() {String requestMsg = "方式三 POST";String response = restTemplate.postForObject("http://resttemplate-feign/resttemplate/postRestTemplateTest", requestMsg, String.class);log.info("response: {}", response);return response;}
}

9 项目目录结构

项目测试

1 打开postman，选择1-7，输入测试的方法

        switch (number) {case 1:                                           //直接使用url调用res = restTemplateService.restTemplateGet1();break;case 2:                                          //直接使用url调用res = restTemplateService.restTemplatePost1();break;case 3:                                          //使用LoadBalancerClient自动选择一个url和port调用res = restTemplateService.restTemplateGet2();break;case 4:                                          //使用LoadBalancerClient自动选择一个url和port调用res = restTemplateService.restTemplatePost2();break;case 5:                                          //使用服务名自己调用res = restTemplateService.restTemplateGet3();break;case 6:                                          //使用服务名自己调用res = restTemplateService.restTemplatePost3();break;case 7:                                          //使用服务名自己调用res = httpClientPoolUtils.postRestTemplateJson("http://resttemplate-feign/resttemplate/postRestTemplateTest", "I am yuange", null);break;

心得

第一次使用RestTemplate调用feign，感觉还不错哦

作为程序员第 146 篇文章，每次写一句歌词记录一下，看看人生有几首歌的时间，wahahaha …

Lyric：有一条热昏头的响尾蛇

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使用RestTemplate进行feignclient调用（附源码）

使用RestTemplate进行feignclient调用（附源码）

问题背景

项目搭建

项目测试

心得

Lyric：有一条热昏头的响尾蛇

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使用RestTemplate进行feignclient调用（附源码）

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问题背景

项目搭建

项目测试

心得

Lyric： 有一条热昏头的响尾蛇

使用RestTemplate进行feignclient调用（附源码）相关推荐

最新文章

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Lyric：有一条热昏头的响尾蛇