JAVA WebService范例

JAVA WebService实例
一、Axis安装 1、环境 J2SE SDK 1.5 or 1.6: 我使用 1.6 Servlet Container: 我使用的Tomcat 6.0

2、到 http://ws.apache.org/Axis/网站下载Axis安装包

3、先在eclipse下新建web project为WebServiceDemo.在Tomcat的配置xml配置上：<Context path="/webservice" docBase="D:\workspace\WebServiceDemo\WebRoot"/>.解压下载的axis安装包，将webapps\axis下的lib文件夹和web.xml文件拷到工程对应目录

4、启动tomcat,访问http://localhost/webservice检查安装是否成功，我的端口设置为80，页面index.html自动跳转后出错，是因为没把类拷入，先不管。

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.新建包com.qdl.server,编写服务端程序SayHello

package com.qdl.server;public class SayHello{      public String getName(String name)      {          return "hello "+name;      }}

2、将源码拷贝到WebRoot下，重命名为 SayHello.jws (注意不用拷上面的package ...行)

3、访问连接http://localhost/webservice/SayHello.jws?wsdl，页面显示Axis自动生成的wsdl，同时会在WEB-INF下创建jwsClasses文件夹，在此生成SayHello.class文件

4、新建包com.qdl.client,编写访问服务的客户端 SayHelloClient.java

import javax.xml.namespace.QName;import org.apache.axis.client.Call;import org.apache.axis.client.Service;public class SayHelloClient {public static void main(String[] args){   //程序访问即时发布的服务   try{    //创建访问点    String endpoint = "http://localhost/webservice/SayHello.jws";    //创建service    Service service = new Service();    Call call = null;    //创建call    call = (Call) service.createCall();    //设置操作名    call.setOperationName(new QName("http://localhost/webservice/SayHello.jws","getName"));    //设置访问点    call.setTargetEndpointAddress(new java.net.URL(endpoint));    //调用服务，返回值    String ret = (String) call.invoke(new Object[]{"zhangsan"});    System.out.println("返回的信息是：" + 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SayHello

2、新建包com.qdl.dao编写代理接口

package com.qdl.dao;
import java.rmi.Remote;
public interface HelloClientInterface extends Remote {

public String getName(String name) throws java.rmi.RemoteException;
}
3、编写并执行客户端程序TestHelloClient.java

package com.qdl.client;import java.net.URL;import javax.xml.namespace.QName;import javax.xml.rpc.ServiceFactory;import javax.xml.rpc.Service;import com.qdl.dao.HelloClientInterface;public class TestHelloClient {public static void main(String[] args) {   try {    String wsdlUrl = "http://localhost/webservice/SayHello.jws?wsdl";    String nameSpaceUri = "http://localhost/webservice/SayHello.jws";    //注意下面的serviceName和portName,    //http://localhost/webservice/SayHello.jws?wsdl页面的xml最下端有    String serviceName = "SayHelloService";    String portName = "SayHello";    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("返回信息是：" + proxy.getName("zhangsan"));   } catch (Exception ex) {    ex.printStackTrace();   }}}

四、编写wsdd发布web服务，编写stub client访问web服务(定制发布服务)

1、编写服务端程序SayHello

package com.qdl.server;public class SayHello{      public String getName(String name)      {          return "hello "+name;      }}2.编写LogHandler.java(好像这个并没什么用)import java.util.Date;import org.apache.axis.AxisFault;import org.apache.axis.Handler;import org.apache.axis.MessageContext;import org.apache.axis.handlers.BasicHandler;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、先在WEB-INF目录下编写server-config.wsdd文件：
文件名server-config.wsdd:

<?xml version="1.0" encoding="UTF-8"?><deployment xmlns="http://xml.apache.org/axis/wsdd/"            xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"><globalConfiguration><parameter name="adminPassword" value="admin"/><parameter name="attachments.Directory" value="./attachments"/><parameter name="attachments.implementation"             value="org.apache.axis.attachments.AttachmentsImpl"/><parameter name="sendXsiTypes" value="true"/><parameter name="sendMultiRefs" value="true"/><parameter name="sendXMLDeclaration" value="true"/><parameter name="axis.sendMinimizedElements" value="true"/><requestFlow>   <handler type="java:org.apache.axis.handlers.JWSHandler">    <parameter name="scope" value="session"/>   </handler>   <handler type="java:org.apache.axis.handlers.JWSHandler">    <parameter name="scope" value="request"/>    <parameter name="extension" value=".jwr"/>   </handler></requestFlow></globalConfiguration><handler name="LocalResponder"          type="java:org.apache.axis.transport.local.LocalResponder"/><handler name="URLMapper"          type="java:org.apache.axis.handlers.http.URLMapper"/><handler name="Authenticate"          type="java:org.apache.axis.handlers.SimpleAuthenticationHandler"/><service name="AdminService" provider="java:MSG"><parameter name="allowedMethods" value="AdminService"/><parameter name="enableRemoteAdmin" value="false"/><parameter name="className" value="org.apache.axis.utils.Admin"/><namespace>http://xml.apache.org/axis/wsdd/</namespace></service><service name="Version" provider="java:RPC"><parameter name="allowedMethods" value="getVersion"/><parameter name="className" value="org.apache.axis.Version"/></service><transport name="http"><requestFlow>   <handler type="URLMapper"/>   <handler type="java:org.apache.axis.handlers.http.HTTPAuthHandler"/></requestFlow></transport><transport name="local"><responseFlow>   <handler type="LocalResponder"/></responseFlow></transport></deployment>

然后在WEB-INF下再编写deploy.wsdd文件：
文件名deploy.wsdd

<deployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"> <service name="MyService" provider="java:RPC">    <parameter name="className" value="com.qdl.server.SayHello"/>    <parameter name="allowedMethods" value="*"/> </service> </deployment>

4、发布服务：

java org.apache.axis.client.AdminClient -lhttp://地址:端口/context模块/services/AdminService deploy.wsdd
这一命令主要是把deploy.wsdd的service配置到server-config.wsdd中,同时更新内存
注意：上面命令的前提是要把axis的jar包配置到系统classpath环境变量中，否则报找不到类的错误

5、生成client stub文件

a:方式1(本人用得此种方式)

将SayHello.java拷贝到WebRoot下(前面已经拷贝)，重命名为SayHello.jws，

执行下面的命令生存client stub

java org.apache.axis.wsdl.WSDL2Java -p com.qdl.clienthttp://localhost/webservice/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 -lhttp://localhost/webservice/SayHello -nsayhello com.qdl.server.SayHello

执行如下命令生成client stub

java org.apache.axis.wsdl.WSDL2Java SayHello.wsdl -p com.qdl.client

此时在文件夹WEB-INF下com.qdl.client下生成的stub client文件列表为：

1.SayHello.java

2.SayHelloService.java。

3.SayHelloServiceLocator.java

4.SayHelloSoapBindingStub.java
把com包整体剪到src下编译


6、编写客户端程序，编译并执行

package com.qdl.client;public class SayHelloClient2 {public static void main(String[] args){   //访问定制发布的服务   try{    SayHelloService service = new SayHelloServiceLocator();    SayHello_PortType client = service.getSayHello();    String retValue = client.getName("zhangsan");    System.out.println("返回的信息是："+retValue);   }catch (Exception e){    System.err.println("Execution failed. Exception: " + e);   }}}

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