最近在学习Web Service，发现了一个国内的Web Service提供站点，其中最简单的是查询QQ在线状态服务。我通过Java直接发送SOAP请求文件访问Web Service成功，这种方式实现比较简单，不需要第三方的软件包。
import java.io.*;
import java.net.*;
class QQOnlineService {
public static void main(String[] args) throws Exception {
String urlString = "http://www.webxml.com.cn/webservices/qqOnlineWebService.asmx";
String xmlFile = "QQOnlineService.XML";
String soapActionString = "http://WebXml.com.cn/qqCheckOnline";
URL url = new URL(urlString);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();;
File fileToSend=new File(xmlFile);
byte[] buf=new byte[(int)fileToSend.length()];
new FileInputStream(xmlFile).read(buf);
httpConn.setRequestProperty( "Content-Length",String.valueOf( buf.length ) );
httpConn.setRequestProperty("Content-Type","text/xml; charset=utf-8");
httpConn.setRequestProperty("soapActionString",soapActionString);
httpConn.setRequestMethod( "POST" );
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
OutputStream out = httpConn.getOutputStream();
out.write( buf );
out.close();
InputStreamReader isr = new InputStreamReader(httpConn.getInputStream(),"utf-8");
BufferedReader in = new BufferedReader(isr);
String inputLine;
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream("result.xml")));
while ((inputLine = in.readLine()) != null){
System.out.println(inputLine);
bw.write(inputLine);
bw.newLine();
}
bw.close();
in.close();
}
}
程序用到的 QQOnlineService.XML文件可以通过预先访问http://www.webxml.com.cn/webservices/qqOnlineWebService.asmx得到。
查询结果文件如下，对其进一步编程可以实现更为灵活的查询功能。
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<qqCheckOnlineResponse xmlns="http://WebXml.com.cn/">
<qqCheckOnlineResult>N
</qqCheckOnlineResult>
</qqCheckOnlineResponse>
</soap:Body>
</soap:Envelope>
