使用Java客戶端類調(diào)用C# WebService
使用這個(gè)類不用安裝任何第三方工具,因?yàn)椴捎胔ttp的方式發(fā)送xml文件,所以你只需要安裝好JDK就可以了。執(zhí)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(jù)返回的xml數(shù)據(jù)來(lái)進(jìn)行其他程序處理。通過(guò)這種方式實(shí)現(xiàn)了Java平臺(tái)和.NET平臺(tái)的數(shù)據(jù)交換和Java客戶端類調(diào)用C# WebService。
下面是滿足Java客戶端類調(diào)用的源代碼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);
- }
- }
- }
- }
- }
編譯:javac SOAPClient4XG.java
運(yùn)行的命令格式: java -classpath . SOAPClient4XG
http://localhost/BokeServices/Service1.asmx c:loginReq.xml
http://tempuri.org/UserLoginReq
不過(guò)先不要運(yùn)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里的內(nèi)容是Java客戶端類調(diào)用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(diào)用失敗,如果你在C# WebServices中使用了方法默認(rèn)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(shù)名是與C# WebServices的方法名、參數(shù)名是一一對(duì)應(yīng)的(參數(shù)順序是可以顛倒的)。
我先介紹一個(gè)簡(jiǎn)單的例子(c:loginReq.xml),這個(gè)xml文件調(diào)用了遠(yuǎn)程C# WebService的UserLoginReq方法,并帶UserAcc(用戶名)和UserPwd(口令)兩個(gè)參數(shù),調(diào)用成功后C#會(huì)自動(dòng)返回一個(gè)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(xiàn)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(jié)構(gòu)UserLoginResp,C# WebServices返回SOAP信息時(shí)會(huì)自動(dòng)將UserLoginResp結(jié)構(gòu)轉(zhuǎn)換成xml的格式。
用此類做xml rpc server 的客戶端也很簡(jiǎn)單,下文是一個(gè)客戶端rpc.xml文件,調(diào)用了xml rpc server 端實(shí)現(xiàn)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(diào)用命令的格式:
java -classpath %CLASSPATH%;. SOAPClient4XG.
http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc rpc.xml
對(duì)比調(diào)用C# WebServices的命令行,可以看出調(diào)用xml rpc server的命令行少一個(gè)方法名參數(shù)。http://192.168.25.97:8080/BokeeXmlRpc/xml-rpc 是提供xml rpc 調(diào)用的server端servlet地址。
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