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JAVA技巧:将Java程序转换为Webservice

时间:2009-02-02 15:57:00   来源:无忧考网     [字体: ]
1、选择要转换的java文件,生成class
  2、写wsdd
  3、发布
  剩下的就只有调用了wsdl2java
  我原来的系统是CICS的,对后台封装了一层,现在用webservice再封装一层,前台页面,控制,数据传输,数据处理统统都可以分开了,爽
  //以下是从网上找的关于AXIS的入门教程
  一、Axis安装
  1、环境 J2SE SDK 1.3 or 1.4: 我使用 1.4.2 Servlet Container: 我使用的Tomcat 5.0
  2、到 //ws.apache.org/Axis/网站下载Axis安装包
  3、解压缩安装包,将Axis_UNZIP_PATH\Axis-version\webapps下的Axis包拷贝到TOMCAT_HOME\webapps\下,以下约定Axis_HOME为该TOMCAT_HOME\webapps\Axis目录
  4、启动tomcat,访问//localhost:8080/Axis 检查安装是否成功
  5、以上步骤执行成功,可以开发webservice例子了
  Axis支持三种web service的部署和开发,分别为:
  1、Dynamic Invocation Interface ( DII)
  2、Stubs方式
  3、Dynamic Proxy方式
  二、编写DII(Dynamic Invocation Interface )方式web服务
  1.编写服务端程序HelloClient
  public class HelloClient
  {
  public String getName(String name)
  {
  return "hello "+name;
  }
  }
  2、将源码拷贝到Axis_HOME下,重命名为 HelloClient.jws
  3、访问连接//localhost:8080/Axis/HelloClient.jws?wsdl,页面显示Axis自动生成的wsdl
  4、编写访问服务的客户端 TestHelloClient.java
  import org.apache.Axis.client.Call;
  import org.apache.Axis.client.Service;
  import javax.xml.namespace.QName;
  import javax.xml.rpc.ServiceException;
  import java.net.MalformedURLException;
  import java.rmi.RemoteException;
  public class SayHelloClient2
  {
  public static void main(String[] args)
  {
  try
  {
  String endpoint =
  "//localhost:8080/Axis/HelloClient.jws";
  Service service = new Service();
  Call call = null;
  call = (Call) service.createCall();
  call.setOperationName(new QName(
  "//localhost:8080/Axis/HelloClient.jws",
  "getName"));
  call.setTargetEndpointAddress
  (new java.net.URL(endpoint));
  String ret = (String) call.invoke(new Object[]
  {"zhangsan"});
  System.out.println("return value is " + ret);
  }
  catch (Exception ex)
  {
  ex.printStackTrace();
  }
  }
  }
  三、编写Dynamic Proxy方式访问服务
  1、编写部署服务端程序,同上边DII方式,本次仍使用上边部署的HelloClient
  2、编写代理接口
  public interface HelloClientInterface
  extends java.rmi.Remote
  {
  public String getName(String name)
  throws java.rmi.RemoteException;
  }
  3、编写并执行客户端程序TestHelloClient.java
  import javax.xml.rpc.Service;
  import javax.xml.rpc.ServiceFactory;
  import java.net.URL;
  import javax.xml.namespace.QName;
  public class TestHelloClient
  {
  public static void main(String[] args)
  {
  try
  {
  String wsdlUrl =
  "//localhost:8080/Axis/HelloClient.jws?wsdl";
  String nameSpaceUri =
  "//localhost:8080/Axis/HelloClient.jws";
  String serviceName = "HelloClientService";
  String portName = "HelloClient";
  ServiceFactory serviceFactory =
  ServiceFactory.newInstance();
  Service afService =
  serviceFactory.createService(new URL(wsdlUrl),
  new QName(nameSpaceUri, serviceName));
  HelloClientInterface proxy = (HelloClientInterface)
  afService.getPort(new QName(
  nameSpaceUri, portName),
  HelloClientInterface.class);
  System.out.println
  ("return value is "+proxy.getName("john") ) ;
  }catch(Exception ex)
  {
  ex.printStackTrace() ;
  }
  }
  四、编写wsdd发布web服务,编写stub client访问web服务
  1、编写服务端程序server,SayHello.java,编译server.SayHello.java
  package server;
  public class SayHello
  {
  public String getName(String name)
  {
  return "hello "+name;
  }
  }
  2.编写LogHandler.java
  import org.apache.Axis.AxisFault;
  import org.apache.Axis.Handler;
  import org.apache.Axis.MessageContext;
  import org.apache.Axis.handlers.BasicHandler;
  import java.util.Date;
  public class LogHandler
  extends BasicHandler
  {
  public void invoke
  (MessageContext msgContext)
  throws AxisFault
  {
  try {
  Handler serviceHandler
  = msgContext.getService();
  Integer numAccesses =
  (Integer)serviceHandler.getOption("accesses");
  if (numAccesses == null)
  numAccesses = new Integer(0);
  numAccesses = new Integer
  (numAccesses.intValue() + 1);
  Date date = new Date();
  String result =
  date + ": service " +
  msgContext.getTargetService() +
  " accessed " + numAccesses + " time(s).";
  serviceHandler.setOption
  ("accesses", numAccesses);
  System.out.println(result);
  } catch (Exception e)
  {
  throw AxisFault.makeFault(e);
  }
  }
  }
  3、编写wsdd文件
  deploy.wsdd
  "//xml.apache.org/Axis/wsdd/"
  xmlns:java=
  "//xml.apache.org/Axis/wsdd/providers/java">
  provider="java:RPC">
  value="server.SayHello"/>
  value="*"/>
  3、将编译后的文件拷贝到Axis_HOME/WEB-INF/classes下,如:D:\tomcat\webapps\Axis\WEB-INF\classes
  4、发布服务:
  java org.apache.Axis.client.AdminClient deploy.wsdd
  5、生成client stub文件
  a:方式1
  将SayHello.java拷贝到Axis_HOME/下,重命名为SayHello.jws,
  执行下面的命令生存client stub
  java org.apache.Axis.wsdl.WSDL2Java
  -p client //localhost:8080
  /Axis/services/SayHello.jws?wsdl
  b:方式2
  执行如下命令生成SayHello.wsdl
  java org.apache.Axis.wsdl.Java2WSDL
  -oSayHello.wsdl -l//localhost:8080
  /Axis/services/SayHello -nsayhello server.SayHello
  执行如下命令生成client stub
  java org.apache.Axis.wsdl.WSDL2Java
  SayHello.wsdl -p client
  生成的stub client文件列表为:
  1.SayHello.java
  2.SayHelloService.java。
  3.SayHelloServiceLocator.java
  4.SayHelloSoapBindingStub.java
  6、编写客户端程序,编译并执行
  public class SayHelloClient
  {
  public static void main(String[] args)
  {
  try
  {
  SayHelloService service = new client.
  SayHelloServiceLocator();
  client.SayHello_PortType
  client = service.getSayHello();
  String retValue=client.getName("zhangsan");
  System.out.println(retValue);
  }
  catch (Exception e)
  {
  System.err.println
  ("Execution failed. Exception: " + e);
  }
  }
  }
  您也可以写server-config.wsdd
  xmlns:java="//xml.apache.org/axis/wsdd/providers/java">
  value="org.apache.axis.attachments.AttachmentsImpl"/>