选型

其实在自己的项目里面也有类似的调用，当时使用的是“JAXRSClientFactory”获得静态代理client。 由于这种方式需要依赖于远程调用的webservice接口（需要引入别人的jar包）。这就造成了高耦合。因此不适用。

所以需要以一种低耦合的方式来实现。便有了选型的想法。

在网上搜索一番后，基本定型为两种方式：

1.HttpClient

2.RestTemplate

接下来就分别列出两种方式的实现代码

HttpClient

import java.io.IOException;  import java.text.MessageFormat;  import java.util.ArrayList;  import java.util.List;  import java.util.concurrent.TimeUnit;    import org.apache.http.NameValuePair;  import org.apache.http.client.ClientProtocolException;  import org.apache.http.client.ResponseHandler;  import org.apache.http.client.entity.UrlEncodedFormEntity;  import org.apache.http.client.methods.HttpGet;  import org.apache.http.client.methods.HttpPost;  import org.apache.http.impl.client.BasicResponseHandler;  import org.apache.http.impl.client.CloseableHttpClient;  import org.apache.http.impl.client.HttpClients;  import org.apache.http.message.BasicNameValuePair;  import org.slf4j.Logger;  import org.slf4j.LoggerFactory;  public class HttpClientUtil {      private static final Logger log = LoggerFactory.getLogger(HttpClientUtil.class);      private CloseableHttpClient httpClient = HttpClients.createDefault();        public static String executePost(String url, String tdfBase64) throws Exception {                    String result = null;              HttpPost httpPost = new HttpPost(url);                          httpPost.setEntity(new HttpEntity<String>(tdfBase64));                  HttpResponse response = httpClient.execute(httpPost);              if (response != null) {                  HttpEntity resEntity = response.getEntity();                  if (resEntity != null) {                      result = EntityUtils.toString(resEntity, "utf-8");                  }              }                    return result;          }      }        public static void main(String[] args) {        // TODO Auto-generated method stub        String url = "http://169.8.160.201:8080/xx/Webservice/Submit";          String base64Tdf = "MS4wMToxMzIdMS4wMjowMjAxHTEuMDM6MR8wMR4yHzAwHTEuMDQ6SVJRHTEuMDU6MjAxNjA1MDQdMS4wNjoxHTEuMDc6Q09HRU5UHTEuMDg6VEhBSUxBTkQdMS4wOTpTRVFVRU5DRU5PMTIzNB0xLjExOjE5LjY5HTEuMTI6MTkuNjkcMi4wMDE6MzEdMi4wMDI6MDAdMi4xNzY6MDA3MDA5HA==";        HttpClientUtil client = new HttpClientUtil();        String result=client.executePost(url, base64Tdf, "");        System.out.println(result);    }

RestTemplate

package com.biolive.client;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.http.HttpEntity;import org.springframework.http.client.SimpleClientHttpRequestFactory;import org.springframework.web.client.RestClientException;import org.springframework.web.client.RestTemplate;public class RestTemplateClient {            private static final Logger log = LoggerFactory.getLogger(RestTemplateClient.class);    private static final int connectTimeout= 5000;    private static final int readTimeOut=5000;    private RestTemplate restTemplate;        public RestTemplateClient(){        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();        requestFactory.setConnectTimeout(connectTimeout);        requestFactory.setReadTimeout(readTimeOut);                restTemplate = new RestTemplate(requestFactory);    }        public String executePost(String url, String base64Tdf){        String result = null;                       HttpEntity<String>request = new HttpEntity<String>(base64Tdf);        try{            result=restTemplate.postForObject(url, request, String.class);        }catch(RestClientException ex){            ex.printStackTrace();              log.info("call post interface error: " + ex.getMessage());          }                    return result;    }    public static void main(String[] args) {        // TODO Auto-generated method stub        String url = "http://169.8.160.201:8080/xx/Webservice/Submit";          String base64Tdf = "MS4wMToxMzIdMS4wMjowMjAxHTEuMDM6MR8wMR4yHzAwHTEuMDQ6SVJRHTEuMDU6MjAxNjA1MDQdMS4wNjoxHTEuMDc6Q09HRU5UHTEuMDg6VEhBSUxBTkQdMS4wOTpTRVFVRU5DRU5PMTIzNB0xLjExOjE5LjY5HTEuMTI6MTkuNjkcMi4wMDE6MzEdMi4wMDI6MDAdMi4xNzY6MDA3MDA5HA==";        RestTemplateClient client = new RestTemplateClient();        String result=client.executePost(url, base64Tdf);        System.out.println(result);    }        }