Java HttpClient 4.3.1 訪問ASP.NET WebService

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

依賴Jar包文件：commons-codec-1.6.jar，httpclient-4.3.1.jar,httpcore-4.3.jar，另外，須要額外加入log4j-1.2.16.jar及commons-logging-1.1.3.jar包。

示例代碼以下:

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("請求服務的Soap文本："+EntityUtils.toString(post.getEntity()));
			System.out.println("請求服務結果狀態:"+response.getStatusLine());
			System.out.println("請求服務返回XML文本："+EntityUtils.toString(response.getEntity()));			
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	
	/**
	 * 生成請求服務的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='花無影'</strwhere>" +
		    "</getStudentInfo>" +
		 " </soap12:Body>" +
		"</soap12:Envelope>" ;
		return soapData;
	}
}

 說明:其中生成請求的Soap文本中，

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

<strKey>person</strKey>

<strwhere>name='花無影'</strwhere>

</getStudentInfo>，

getStudentInfo爲方法名稱，strKey及strwhere爲參數名稱，對應的值爲參數的值。