WebServices和apache xml rpc server，這個類的源碼是從網上下載的，我在博客網做項目的時候一直使用這個類來調試C# WebServices和MetaWeblog API。順便在這裡也給大家介紹一下C#如何處理此類發送的XML數據。
使用這個類不用安裝任何第三方工具，因為采用http的方式發送xml文件，所以你只需要安裝好JDK就可以了。執行此類還可以獲得WebServices或xml rpc server返回的xml字符流，你可以根據返回的XML數據來進行其他程序處理。通過這種方式實現了Java平台和.Net平台的數據交換和WebService調用。
下面是此類的源代碼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) { //小於
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) //大於
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);
}
}
}
}
}
編譯：javac SOAPClIEnt4XG.Java
運行的命令格式： Java -classpath . SOAPClIEnt4XG http://localhost/BokeServices/Service1.asmx c:\loginReq.xml http://tempuri.org/UserLoginReq，不過先不要運行上面的命令，先介紹一下命令行的意思，http://localhost/BokeServices/Service1.asmx是C# WebService的地址，c:\loginReq..xml裡的內容是調用的WebService方法的xml文件， http://tempuri.org是WebService方法的命名空間，一定要有，否則調用失敗，如果你在C# WebServices中使用了方法默認的命名空間的話，就使用http://tempuri.org，否則要與C#中定義的一致，UserLoginReq是C# WebServices的方法名。注意XML文件中的方法名和參數名是與C# WebServices的方法名、參數名是一一對應的（參數順序是可以顛倒的）。
我先介紹一個簡單的例子(c:\loginReq.xml)，這個xml文件調用了遠程C# WebService的UserLoginReq方法，並帶UserAcc(用戶名)和UserPwd(口令)兩個參數，調用成功後C#會自動返回一個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＞
現在看一下C# WebServices的UserLoginReq的方法的定義：
public struct UserLoginResp
{
public string UserAcc;
public int Result;
}
[WebMethod]
public UserLoginResp UserLoginReq(string UserAcc,string UserPwd,int ReqFrom)
{
…
}
注意結構UserLoginResp，C# WebServices返回SOAP信息時會自動將UserLoginResp結構轉換成XML的格式。
用此類做xml rpc server 的客戶端也很簡單，下文是一個客戶端rpc.xml文件，調用了XML rpc server 端實現的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＞
調用命令的格式：
Java -classpath %CLASSPATH%;. SOAPClIEnt4XG. http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc rpc.XML
對比調用WebServices的命令行，可以看出調用xml rpc server的命令行少一個方法名參數。http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc 是提供xml rpc 調用的server端servlet地址，關於如何用apache XML rpc技術實現MetalogAPI的帖子將在近期整理發布。
注：上文的左右尖括號為保證正常發貼替換為全角。
作者：王保政
QQ:19803446
Email:[email protected]
