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使用这个类不用安装任何第三方工具,因为采用http的方式发送xml文件,所以你只需要安装好JDK就可以了。执行此类还可以获得WebServices或xml rpc server返回的xml字符流,你可以根据返回的xml数据来进行其他程序处理。通过这种方式实现了Java平台和.NET平台的数据交换和Java客户端类调用C# WebService。

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下面是满足Java客户端类调用的源代码SOAPClient4XG.java:
- /**
 - * SOAPClient4XG. Read the SOAP envelope
 - file passed as the second
 - * parameter, pass it to the SOAP endpoint
 - passed as the first parameter, and
 - * print out the SOAP envelope passed
 - as a response. with help from Michael
 - * Brennan 03/09/01
 - *
 - *
 - * @author Bob DuCharme
 - * @version 1.1
 - * @param SOAPUrl URL of SOAP Endpoint
 - to send request.
 - * @param xmlFile2Send A file with an XML
 - document of the request.
 - *
 - * 5/23/01 revision: SOAPAction added
 - */
 - import java.io.*;
 - import java.net.*;
 - public class SOAPClient4XG {
 - public static void main(String[] args)
 - throws Exception {
 - if (args.length < 2) { //小于
 - System.err.println("Usage: java SOAPClient4XG " +
 - "http://soapURL soapEnvelopefile.xml" +
 - " [SOAPAction]");
 - System.err.println("SOAPAction is optional.");
 - System.exit(1);
 - }
 - String SOAPUrl = args[0];
 - String xmlFile2Send = args[1];
 - String SOAPAction = "";
 - if (args.length > 2) //大于
 - SOAPAction = args[2];
 - // Create the connection where we're going
 - to send the file.
 - URL url = new URL(SOAPUrl);
 - URLConnection connection =
 - url.openConnection();
 - HttpURLConnection httpConn =
 - (HttpURLConnection) connection;
 - // Open the input file. After we copy
 - it to a byte array, we can see
 - // how big it is so that we can set the
 - HTTP Cotent-Length
 - // property. (See complete e-mail below
 - for more on this.)
 - FileInputStream fin =
 - new FileInputStream(xmlFile2Send);
 - ByteArrayOutputStream bout =
 - new ByteArrayOutputStream();
 - // Copy the SOAP file to the open connection.
 - copy(fin,bout);
 - fin.close();
 - byte[] b = bout.toByteArray();
 - // Set the appropriate HTTP parameters.
 - httpConn.setRequestProperty( "Content-Length",
 - String.valueOf( b.length ) );
 - httpConn.setRequestProperty("Content-Type","
 - text/xml; charset=utf-8");
 - httpConn.setRequestProperty("SOAPAction",SOAPAction);
 - httpConn.setRequestMethod( "POST" );
 - httpConn.setDoOutput(true);
 - httpConn.setDoInput(true);
 - // Everything's set up; send the XML
 - that was read in to b.
 - OutputStream out = httpConn.getOutputStream();
 - out.write( b );
 - out.close();
 - // Read the response and write it
 - to standard out.
 - InputStreamReader isr =
 - new InputStreamReader(httpConn.getInputStream());
 - BufferedReader in = new BufferedReader(isr);
 - String inputLine;
 - while ((inputLine = in.readLine()) != null)
 - System.out.println(inputLine);
 - in.close();
 - }
 - // copy method from From E.R. Harold's
 - book "Java I/O"
 - public static void copy(InputStream in,
 - OutputStream out)
 - throws IOException {
 - // do not allow other threads to read from the
 - // input or write to the output while copying is
 - // taking place
 - synchronized (in) {
 - synchronized (out) {
 - byte[] buffer = new byte[256];
 - while (true) {
 - int bytesRead = in.read(buffer);
 - if (bytesRead == -1) break;
 - out.write(buffer, 0, bytesRead);
 - }
 - }
 - }
 - }
 - }
 
编译:javac SOAPClient4XG.java
运行的命令格式: java -classpath . SOAPClient4XG
http://localhost/BokeServices/Service1.asmx c:loginReq.xml
http://tempuri.org/UserLoginReq
不过先不要运行上面的命令,先介绍一下命令行的意思,http://localhost/BokeServices/Service1.asmx是C# WebService的地址;
c:loginReq..xml里的内容是Java客户端类调用WebService方法的xml文件, http://tempuri.org是WebService方法的命名空间,一定要有,否则调用失败,如果你在C# WebServices中使用了方法默认的命名空间的话,就使用http://tempuri.org,否则要与C#中定义的一致,UserLoginReq是C# WebServices的方法名。注意xml文件中的方法名和参数名是与C# WebServices的方法名、参数名是一一对应的(参数顺序是可以颠倒的)。
我先介绍一个简单的例子(c:loginReq.xml),这个xml文件调用了远程C# WebService的UserLoginReq方法,并带UserAcc(用户名)和UserPwd(口令)两个参数,调用成功后C#会自动返回一个xml格式的SOAP包。
- 〈?xml version="1.0" encoding="utf-8"?〉
 - 〈soap:Envelope xmlns:xsi="
 - http://www.w3.org/2001/XMLSchema-instance"
 - xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 - xmlns:soap="http://schemas.xmlsoap.org/soap/
 - envelope/"〉
 - 〈soap:Body〉
 - 〈UserLoginReq xmlns="http://tempuri.org/"〉
 - 〈UserAcc〉baozheng〈/UserAcc〉
 - 〈UserPwd〉mypwd〈/UserPwd〉
 - 〈/UserLoginReq〉
 - 〈/soap:Body〉
 - 〈/soap:Envelope〉
 
现在看一下C# WebServices的UserLoginReq的方法的定义:
- public struct UserLoginResp
 - {
 - public string UserAcc;
 - public int Result;
 - }
 - [WebMethod]
 - public UserLoginResp UserLoginReq(string UserAcc,
 - string UserPwd,int ReqFrom)
 - {
 - …
 - }
 
注意结构UserLoginResp,C# WebServices返回SOAP信息时会自动将UserLoginResp结构转换成xml的格式。
用此类做xml rpc server 的客户端也很简单,下文是一个客户端rpc.xml文件,调用了xml rpc server 端实现的metaWeblog.deletePost方法。
- 〈?xml version="1.0" encoding="utf-8"?〉
 - 〈methodCall〉
 - 〈methodName〉metaWeblog.deletePost〈/methodName〉
 - 〈params〉
 - 〈param〉〈value〉appKeyValue〈/value〉〈/param〉
 - 〈param〉〈value〉746〈/value〉〈/param〉
 - 〈param〉〈value〉baozheng〈/value〉〈/param〉
 - 〈param〉〈value〉Hello123〈/value〉〈/param〉
 - 〈/params〉
 - 〈/methodCall〉
 
调用命令的格式:
java -classpath %CLASSPATH%;. SOAPClient4XG.
http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc rpc.xml
对比调用C# WebServices的命令行,可以看出调用xml rpc server的命令行少一个方法名参数。http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc 是提供xml rpc 调用的server端servlet地址。