使用Java客户端类调用c# WebService和xml rpc server(转)

 

  本文介绍一个非常实用的客户端工具类来调用C# WebServices和 rpc server,这个类的源码是从网上下载的,我在博客网做项目的时候一直使用这个类来调试C# WebServices和MetaWeblog API。顺便在这里也给大家介绍一下C#如何处理此类发送的xml数据。
  • 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平台和平台的数据交换和WebService调用。
    下面是此类的源代码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里的内容是调用的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,关于如何用apache xml rpc技术实现MetalogAPI的帖子将在近期整理发布。

    注:上文的左右尖括号为保证正常发贴替换为全角。

    作者:王保政
    QQ:19803446
    Msn:baozhengw999@hotmail.com
    Email:baozhengw@netease.com
posted @ 2007-11-19 10:40  jambol  阅读(974)  评论(0编辑  收藏  举报