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.yzl.util;

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请求帮助类
 * @author yangzhilong
 *
 */
public class RestClient {

    private static RestTemplate restTemplate;

    /**
     * 注入实现类
     * @param client
     */
    public static void setRestTemplate(RestTemplate client) {
        restTemplate = client;
    }
    /**
     * 无参数或者参数附带在url中
     * @param url
     * @return
     */
    public static String get(String url) {
        return restTemplate.getForObject(url , String.class);
    }

    /**
     * json格式的post提交
     * @param obj
     * @param url
     * @return
     */
    public static String postJson(String url, Object obj) {
        HttpHeaders headers = new HttpHeaders();
        MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
        headers.setContentType(type);
        headers.add("Accept", MediaType.APPLICATION_JSON.toString());
        String result = null;
        if(obj == null){
            result = "{}";
        }else{
            result = JSON.toJSONString(obj);
        }
        HttpEntity formEntity = new HttpEntity(result,headers);
        return restTemplate.postForObject(url , formEntity, String.class);
    }
    
    /**
     * form格式的post提交
     * @param map
     * @param url
     * @return
     */
    public static String postForm(String url, Map map){
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        MultiValueMap params= new LinkedMultiValueMap<>();
        for(Map.Entry me : map.entrySet()){
            params.add(me.getKey() , me.getValue());
        }
        HttpEntity> requestEntity = new HttpEntity<>(params, headers);
        return restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class).getBody();
    }

}

然后实际发起HTTP请求的时候使用上面的工具类