SpringBoot配置RestTemplate的代理和超时时间

application.properties：

 #代理设置
 proxy.enabled=false
 proxy.host=192.168.18.233
 proxy.port=8888

 #REST超时配置
 rest.ReadTimeout=35000
 rest.ConnectTimeout=5000

代理配置类：

 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.stereotype.Component;

 import lombok.Data;

 /**
  * 网络代理设置
  *
  * @author yangzhilong
  *
  */
 @Component
 @ConfigurationProperties(prefix="proxy")
 @Data
 public class ProxyConfig {
     /**
      * 是否启用代理
      */
     private Boolean enabled;
     /**
      * 代理主机地址
      */
     private String host;
     /**
      * 代理端口
      */
     private Integer port;
 }

SpringBoot的Configuration：

 import java.net.InetSocketAddress;
 import java.net.Proxy;
 import java.net.SocketAddress;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.client.SimpleClientHttpRequestFactory;
 import org.springframework.web.client.RestTemplate;

 import com.yzl.vo.ProxyConfig;

 @Configuration
 @ConditionalOnClass(ProxyConfig.class)
 public class RestConfiguration {
     @Value("${rest.ReadTimeout}")
     private int readTimeout;
     @Value("${rest.ConnectTimeout}")
     private int connectionTimeout;
     @Autowired
     private ProxyConfig proxyConfig;

     @Bean
     public SimpleClientHttpRequestFactory httpClientFactory() {
         SimpleClientHttpRequestFactory httpRequestFactory = new SimpleClientHttpRequestFactory();
         httpRequestFactory.setReadTimeout(readTimeout);
         httpRequestFactory.setConnectTimeout(connectionTimeout);

         if(proxyConfig.getEnabled()){
             SocketAddress address = new InetSocketAddress(proxyConfig.getHost(), proxyConfig.getPort());
             Proxy proxy = new Proxy(Proxy.Type.HTTP, address);
             httpRequestFactory.setProxy(proxy);
         }

         return httpRequestFactory;
     }

     @Bean
     public RestTemplate restTemplate(SimpleClientHttpRequestFactory httpClientFactory) {
         RestTemplate restTemplate = new RestTemplate(httpClientFactory);
         return restTemplate;
     }
 }

如果不希望这种全局的超时时间污染正常的SpringCloud中restTemplate的时间设置，可以使用如下方法：

 package com.yzl.autoconfig;

 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.web.client.RestTemplate;

 import com.yzl.util.RestClient;

 /**
  * 工具类引导装配类
  * @author yangzhilong
  *
  */
 @Configuration
 public class RestClientAutoConfiguration {
     @Value("${rest.config.connectTimeout:10000}")
     private int connectTimeout;
     @Value("${rest.config.readTimeout:30000}")
     private int readTimeout;

     /**
      * 使用Bootstrap来装配RestClient中的RestTemplate属性，
      * 避免直接装配RestTemplate来污染了正常的spring Cloud的调用
      * @return
      */
     @Bean
     public RestClientBootstrap bootstrap(){
         HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
         httpRequestFactory.setConnectTimeout(connectTimeout);
         httpRequestFactory.setReadTimeout(readTimeout);
         RestTemplate restTemplate = new RestTemplate(httpRequestFactory);
         RestClient.setRestTemplate(restTemplate);
         return new RestClientBootstrap();
     }

     /**
      * 空的引导类
      * @author yangzhilong
      *
      */
     static class RestClientBootstrap {

     }
 }

RestClient工具类：

package com.nike.gcsc.auth.utils;

import java.util.Map;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import com.alibaba.fastjson.JSON;

/**
 * HTTP Rest Util
 * @author yangzhilong
 *
 */
public class RestClient {

    private static RestTemplate restTemplate;

    /**
     * @param client
     */
    public static void setRestTemplate(RestTemplate client) {
        restTemplate = client;
    }

    /**
     *
     * @param <T>
     * @param url
     * @param clasz
     * @return
     */
    public static <T> T get(String url, Class<T> clasz) {
        return restTemplate.getForObject(url , clasz);
    }

    /**
     *
     * @param <T>
     * @param url
     * @param headMap
     * @param bodyObj
     * @param clasz
     * @return
     */
    public static <T> T postJson(String url, Map<String, String> headMap, Object bodyObj, Class<T> clasz) {
        HttpHeaders headers = new HttpHeaders();
        MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
        headers.setContentType(type);
        headers.add("Accept", MediaType.APPLICATION_JSON.toString());
        if(null != headMap) {
            headMap.entrySet().forEach(item -> {
                headers.add(item.getKey(), item.getValue());
            });
        }
        String result = null;
        if(bodyObj == null){
            result = "{}";
        }else{
            result = JSON.toJSONString(bodyObj);
        }
        HttpEntity<String> formEntity = new HttpEntity<String>(result,headers);
        return restTemplate.postForObject(url , formEntity, clasz);
    }

    /**
     *
     * @param <T>
     * @param url
     * @param attrMap
     * @param clasz
     * @return
     */
    public static <T> T postForm(String url, Map<String , String> attrMap, Class<T> clasz){
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        MultiValueMap<String, String> params= new LinkedMultiValueMap<>();
        attrMap.entrySet().forEach(item -> {
            params.add(item.getKey() , item.getValue());

        });
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);
        return restTemplate.exchange(url, HttpMethod.POST, requestEntity, clasz).getBody();
    }

}

然后实际发起HTTP请求的时候使用上面的工具类