首先下载HttpClient 4.3.1的jar包，下载地址：http://mirrors.hust.edu.cn/apache//httpcomponents/httpclient/binary/httpcomponents-client-4.3.1-bin.zip。

依赖Jar包文件：commons-codec-1.6.jar，httpclient-4.3.1.jar,httpcore-4.3.jar，另外，需要额外加入log4j-1.2.16.jar及commons-logging-1.1.3.jar包。

示例代码如下:

package com.project.ws;import java.io.IOException;
import java.io.UnsupportedEncodingException;import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;public class WSClient {public static final String WSDLURL = "http://127.0.0.1:8080/Test.asmx?wsdl";public static void main(String[] args){HttpClient client = HttpClients.createDefault();String reqSoapData = buildReqSoapData();HttpPost post = new HttpPost(WSDLURL);try {HttpEntity re = new StringEntity(reqSoapData,"UTF-8");post.setHeader("Content-Type","application/soap+xml; charset=UTF-8");//post.setHeader("Content-Length", String.valueOf(reqSoapData.length()));post.setEntity(re);           HttpResponse response = client.execute(post);System.out.println("请求服务的Soap文本："+EntityUtils.toString(post.getEntity()));System.out.println("请求服务结果状态:"+response.getStatusLine());System.out.println("请求服务返回XML文本："+EntityUtils.toString(response.getEntity()));          } catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/*** 生成请求服务的Soap XML字符串* @return String*/public static String buildReqSoapData(){String soapData = "";soapData += "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +"<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\">"  +"<soap12:Body>" +" <getStudentInfo xmlns=\"http://tempuri.org/\">" +" <strKey>person</strKey>" +"  <strwhere>name='花无影'</strwhere>" +"</getStudentInfo>" +" </soap12:Body>" +"</soap12:Envelope>" ;return soapData;}
}

说明:其中生成请求的Soap文本中，

<getStudentInfo xmlns="http://tempuri.org/">

<strKey>person</strKey>

<strwhere>name='花无影'</strwhere>

</getStudentInfo>，

getStudentInfo为方法名称，strKey及strwhere为参数名称，对应的值为参数的值。