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);
   }
}
}