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);
    }
    
    
}