Httpclient与RestTemplate的比较（比httpClient更优雅的RestfulURL访问）

/** 
 * HttpClien 的客户端访问 
 */  
private void httpClientVisit() {  
  
    String clientRespOnse= "";  
    try {  
  
        HttpClient client = new DefaultHttpClient();  
        HttpPost request = new HttpPost(mUrl);  
  
        //不是表单数据提交，这边使用 StringEntity 即可  
        //UrlEncodedFormEntity等都是 HttpEntity 接口的实现类  
        StringEntity entity = new StringEntity(mRequestXml, "UTF-8");//编码  
        entity.setContentType("text/xml");  
        request.setEntity(entity);  
        // 发送请求  
        HttpResponse respOnse= client.execute(request);  
  
        org.apache.http.HttpEntity httpEntity = response.getEntity();  
  
        if (httpEntity != null) {  
            // EntityUtils.toString 如果不指定编码，EntityUtils默认会使用ISO_8859_1进行编码  
            clientRespOnse= EntityUtils.toString(httpEntity, "UTF-8");// 记得设置编码或者如下  
            // clientRespOnse= new String(EntityUtils.toString(httpEntity).getBytes("ISO_8859_1"), "UTF-8");  
        }  
  
        if (clientRespOnse== null || "".equals(clientResponse)) {  
            System.err.println("clientResponse is null or empty.");  
  
        }  
  
        System.out.println(clientResponse);  
  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
  
}  

/**  
  * post方式提交表单（模拟用户登录请求）  
  */    
 public void postForm() {    
      
    String url = "http://localhost:8080/Java_WS_Server/rest/surpolicy/sendXml";  
      
     // 创建默认的httpClient实例.      
    HttpClient client = new DefaultHttpClient();  
     // 创建httppost      
     HttpPost httppost = new HttpPost(url);    
     // 创建参数队列      
     List formparams = new ArrayList();    
     formparams.add(new BasicNameValuePair("username", "admin"));    
     formparams.add(new BasicNameValuePair("password", "123456"));    
     UrlEncodedFormEntity uefEntity;    
     try {    
         uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8"); //编码   
         httppost.setEntity(uefEntity);    
         System.out.println("executing request " + httppost.getURI());    
         HttpResponse respOnse= client.execute(httppost);    
Header[] headers = response.getAllHeaders();  
for(int i=0; i 

/**  
 * 发送 get请求  
 */    
public void get() {    
    try {    
        HttpClient client = new DefaultHttpClient();  
        // 创建httpget.      
        HttpGet httpget = new HttpGet("http://www.baidu.com/");    
        System.out.println("executing request " + httpget.getURI());    
        // 执行get请求.      
        HttpResponse respOnse= client.execute(httpget);    
        try {    
            // 获取响应实体      
            HttpEntity entity = response.getEntity();    
            System.out.println("--------------------------------------");    
            // 打印响应状态      
            System.out.println(response.getStatusLine());    
            if (entity != null) {    
                // 打印响应内容长度      
                System.out.println("Response content length: " + entity.getContentLength());    
                // 打印响应内容      
                System.out.println("Response content: " + EntityUtils.toString(entity));    
            }    
            System.out.println("------------------------------------");    
        } finally {    
        }    
    } catch (ClientProtocolException e) {    
        e.printStackTrace();    
    }  catch (IOException e) {    
        e.printStackTrace();    
    } finally {}    
}