Web Services 可以将应用程序转换为网络应用程序。
通过使用 Web Services,您的应用程序可以向全世界发布信息,或提供某项功能。
Web Services 可以被其他应用程序使用。
通过 Web Services,您的会计部门的 Win 2k 服务器可以与 IT 供应商的 UXIX 服务器相连接。
基本的 Web Services 平台是 XML+HTTP。
Web services 使用 XML 来编解码数据,并使用 SOAP 来传输数据。
参考文献及推荐阅读:
http://dev.rdxx.com/Java/WebService/2005-07/27/102648552.shtml
http://www.onjava.com/pub/a/onjava/2002/02/27/tomcat.html?page=1
1 下载SOAP
http://apache.mirror.phpchina.com/ws/axis/1_4/axis-bin-1_4.zip
2 xerces
http://xml.apache.org/dist/xerces-j/Xerces-J-bin.2.9.1.zip
3 JavaMail
http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/javamail-1_4_1.zip?BundledLineItemUUID=9p5IBe.pm1wAAAEZgx8LhFpM&OrderID=G6xIBe.pZPgAAAEZdh8LhFpM&ProductID=3v_ACUFBMTsAAAEYxBQ5AXuF&FileName=/javamail-1_4_1.zip
4 JSF(JavaBean Activation Framework)
http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/jaf-1_1_1.zip?BundledLineItemUUID=d.JIBe.mX1cAAAEZvmRIclpM&OrderID=dDBIBe.mM7MAAAEZsWRIclpM&ProductID=zFnACUFBlVoAAAEYhxc5AXt.&FileName=/jaf-1_1_1.zip
http://127.0.0.1:8080/soap/servlet/rpcrouter
出现如下页面:
SOAP RPC Router
Sorry, I don't speak via HTTP GET- you have to use HTTP POST to talk to me.
复制相关的*.jar进入Tomcat
D:/Tomcat/common/lib/soap.jar;
D:/Tomcat/common/lib/mail.jar;
D:/Tomcat/common/lib/xml-apis.jar;
D:/Tomcat/common/lib/activation.jar;
D:/Tomcat/common/lib/xercesImpl.jar
1 创建HelloWorldService.java

package onjava;

public class HelloWorldService

{

public String getMessage()

{

return "Hello World!";

}

}
2 HelloWorldClient.java

import java.io.*;

import java.util.*;

import java.net.*;

import org.apache.soap.*;

import org.apache.soap.rpc.*;

public class HelloWorldClient {

public static String DEFAULT_ENDPOINT = "http://localhost:8080/soap/servlet/rpcrouter";

public static void main(String args[]) throws Exception {

String endPoint = DEFAULT_ENDPOINT;

//Process Arguments

if (args.length == 1)

endPoint = args[0];

else if (args.length > 1)

System.out.println("java HelloWorldClient [endpoint]");

// Build the SOAP RPC request message using the Call object

Call call = new Call();

call.setTargetObjectURI("urn:onjavaserver");

call.setMethodName("getMessage");

call.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);

// Create a URL object, which represents the endpoint

URL url = new URL(endPoint);

// Send the SOAP RPC request message using invoke() method

Response resp = call.invoke(url, "");

// Check the response.

if (resp.generatedFault()) { // Error Occured

Fault fault = resp.getFault();

System.out.println("The Following Error Occured: ");

System.out.println(" Fault Code = " + fault.getFaultCode());

System.out.println(" Fault String = " + fault.getFaultString());

} else { // Completed Successfully

Parameter result = resp.getReturnValue();

System.out.println(result.getValue());

}

}

}
3 Tomcat下的配置:
Deployed Service Information
'urn:onjavaserver' Service Deployment Descriptor |
---|
Property | Details |
---|
ID | urn:onjavaserver |
Scope | Application |
Provider Type | java |
Provider Class | onjava.HelloWorldService |
Use Static Class | false |
Methods | getMessage |
Type Mappings | |
Default Mapping Registry Class | |
运行:
java HelloWorldClient
Hello World!