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通过HttpClient请求webService

Posted on 2017-05-24 16:10 朱杰兵 阅读(1211) 评论(0)  编辑  收藏

通过HttpClient请求webService 

由于服务端是用webService开发的，android要调用webService服务获取数据，这里采用的是通过HttpClient发送post请求，获取webService数据。
 
服务端使用的webService框架是axis2，请求数据之前，要封装一个xml格式，再通过post请求，获取服务端数据。
请求的xml格式如下所示： 
1 <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"xmlns:sam="http://user.service.xxx.com">
2    <soap:Header/>
3    <soap:Body>
4       <sam:getUserInfo>
5      <sam:userName>sunlightcs</sam:userName>
6       </sam:getUserInfo>
7    </soap:Body>
8 </soap:Envelope>
其中：getUserInfo是方法名，userName是参数名，当然，还可以加多个参数。
 
 
下面的代码是向webService发送请求，获取数据，返回的数据是xml形式的，android只要解析xml数据，就可以获得想要的数据了。 

01 import java.io.IOException;
02 import java.io.OutputStream;
03 import java.io.OutputStreamWriter;
04 import java.io.Writer;
05  
06 import org.apache.http.HttpResponse;
07 import org.apache.http.client.HttpClient;
08 import org.apache.http.client.methods.HttpPost;
09 import org.apache.http.entity.ContentProducer;
10 import org.apache.http.entity.EntityTemplate;
11 import org.apache.http.impl.client.DefaultHttpClient;
12 import org.apache.http.util.EntityUtils;
13  
14  
15 public class ClientTest {
16  
17     public static void main(String[] args) {
18         ClientTest.httpClientPost();
19     }
20      
21     private static void httpClientPost() {
22         HttpClient client = new DefaultHttpClient();
23         HttpPost post = newHttpPost("http://localhost:8080/xxx/services/userService");
24          
25         try {
26             ContentProducer cp = new ContentProducer() {
27                 public void writeTo(OutputStream outstream) throwsIOException {
28                     Writer writer = new OutputStreamWriter(outstream,"UTF-8");
29                      
30                     /**
31                      * 获取请求的xml格式数据
32                      */
33                     String requestXml = getRequestXml();
34                     writer.write(requestXml);
35                     writer.flush();
36                 }
37             };
38  
39             post.setEntity(new EntityTemplate(cp));
40             HttpResponse response = client.execute(post);
41              
42         //打印返回的xml数据
43             System.out.println(EntityUtils.toString(response.getEntity()));
44         } catch (IOException e) {
45             e.printStackTrace();
46         }
47     }
48      
49      
50     private static String getRequestXml(){
51         StringBuilder sb = new StringBuilder("<soap:Envelope xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:sam=\"http://user.service.xxx.com\">");
52         sb.append("<soap:Header/>");
53         sb.append("<soap:Body>");
54         sb.append("<sam:getUserInfo>");
55         sb.append("<sam:userName>sunlightcs</sam:userName>");
56         sb.append("</sam:getUserInfo>");
57         sb.append("</soap:Body>");
58         sb.append("</soap:Envelope>");
59          
60         return sb.toString();
61     }
62  
63 }

返回的数据格式如下： 
1 <?xml version='1.0' encoding='UTF-8'?>
2 <soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
3     <soapenv:Body>
4         <ns:getUserInfoResponse xmlns:ns="http://user.service.xxx.com">
5             <ns:return>xxx</ns:return>
6         </ns:getUserInfoResponse>
7     </soapenv:Body>
8 </soapenv:Envelope>
其中，<ns:return>内的"xxx"可以是json数据，android只需解析标签<ns:return>里的json数据即可。 
转载 http://www.juziku.com/wiki/3919.htm

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