通过HttpClient请求webService

昵称9379950 2012-03-26

展开全文

通过HttpClient请求webService

标签： #httpclient #webservice #android | 发布时间：2011-11-09

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：

<soap:Envelope xmlns:soap="http://www./2003/05/soap-envelope" xmlns:sam="http://user.service."> 
   <soap:Header/> 
   <soap:Body> 
      <sam:getUserInfo> 
     <sam:userName>sunlightcs</sam:userName> 
      </sam:getUserInfo> 
   </soap:Body> 
</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。

import java.io.IOException; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.io.Writer; 
  
import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.ContentProducer; 
import org.apache.http.entity.EntityTemplate; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.util.EntityUtils; 
  
  
public class ClientTest { 
  
    public static void main(String[] args) { 
        ClientTest.httpClientPost(); 
    } 
      
    private static void httpClientPost() { 
        HttpClient client = new DefaultHttpClient(); 
        HttpPost post = new HttpPost("http://localhost:8080/xxx/services/userService"); 
          
        try { 
            ContentProducer cp = new ContentProducer() { 
                public void writeTo(OutputStream outstream) throws IOException { 
                    Writer writer = new OutputStreamWriter(outstream, "UTF-8"); 
                      
                    /** 
                     * 获取请求的xml格式数据 
                     */
                    String requestXml = getRequestXml(); 
                    writer.write(requestXml); 
                    writer.flush(); 
                } 
            }; 
  
            post.setEntity(new EntityTemplate(cp)); 
            HttpResponse response = client.execute(post); 
              
        //打印返回的xml数据 
            System.out.println(EntityUtils.toString(response.getEntity())); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
    } 
      
      
    private static String getRequestXml(){ 
        StringBuilder sb = new StringBuilder("<soap:Envelope xmlns:soap=\"http://www./2003/05/soap-envelope\" xmlns:sam=\"http://user.service.\">"); 
        sb.append("<soap:Header/>"); 
        sb.append("<soap:Body>"); 
        sb.append("<sam:getUserInfo>"); 
        sb.append("<sam:userName>sunlightcs</sam:userName>"); 
        sb.append("</sam:getUserInfo>"); 
        sb.append("</soap:Body>"); 
        sb.append("</soap:Envelope>"); 
          
        return sb.toString(); 
    } 
  
}

返回的数据格式如下：

<?xml version='1.0' encoding='UTF-8'?> 
<soapenv:Envelope xmlns:soapenv="http://www./2003/05/soap-envelope"> 
    <soapenv:Body> 
        <ns:getUserInfoResponse xmlns:ns="http://user.service."> 
            <ns:return>xxx</ns:return> 
        </ns:getUserInfoResponse> 
    </soapenv:Body> 
</soapenv:Envelope>