Tue, 09 May 2006 09:28:00 GMT

�|�上关于axis2做webservice的中文文章�ƈ不多
axis2��实和axis1有很大不�?br />
其中�q�回自定义对象的�Ҏ��g��׃��兼容(可能仅仅是我�q�没研究出来), axis1�q�回对象或对象列表可以直接在�Ҏ��q�回�c�d��中写�? serverlet会自动翻译成wsdl, 虽然axis2也可以自动翻�? 但是用过的客��L��生成工具都没法直接��用此服务, 最后都归于"到OMElemet 对象无法转换", 所以我的方法只好自己写转换函数, 我想�q�个应该不是axis2的标准方法吧, 怎么会越来越�ȝ��?

下面讲一下我的��用流�E?br />需�? 做个webservice服务, 从数据库里面��d��flightleg的一个列表�ƈ�q�回, flightleg列表可以认�ؓ是经�q�一个select语句�q�回的记录集�?br />
软�g环境, windows xp sp2, tomcat5.5 for windows 单一安装�? jre1.5(tomcat5.5的需�?, axis2-0.95(当时是最新版)

试验��程:

       直接安装 tomcat5.5 for windows , 发现服务��L��在启动之后马上自己关�? 查找原因, 发现原来自己用的都是jre1.4, 后从别地拯��一个jre_1.5目录到Program Files\j2sdk1.4.2_05�? 然后讄��tomcat�?java virtual machine 为Program Files\j2sdk1.4.2_05\jre_1.5\bin\client\jvm.dll , 卛_��正常启动.

       axis2安装, �q�个�|�上介绍的很�? 也很�Ҏ��, ��׃��载那个axis2.war�? 拯��到Program Files\Apache Software Foundation\Tomcat 5.5\webapps\目录�? ��q��发布�? tomcat自动感知, �q�生成axis2�q�个目录�l�构. �q�入http://localhost:8080/axis2/ 可以看到�Ƣ迎��面, 然后点击Services 可以看到几个�C��serviece, 具体怎么使用��׃��多说�? �|�上不少, 自带的doc也有说明.
      �~�写service�E�序, 后面逻辑��׃��了, 关键要编写个serviceproxy�c? �q�在里面暴露�Ҏ��作�ؓwebserivce调用, sample里面也有很多, 但是至今�q�没看到�q�回自定义对象的. 我写的如�?

     public OMElement getPVGFlightLegs()
     {
        List list = null ;
        InquiryEngine engine = InquiryFactory.getInquiryEngine();
        list = (List)engine.getPVGFlightLegs();
        OMElement ele = null ;
        ele = createOMElementFromList(list);
         return ele;
    }

�q�回的是OMElement �l�一对象, 需要自己构造OMElement对象树�ƈ�q�回, createOMElementFromList() 代码如下:

         public OMElement createOMElementFromList(List flightLegInfoList)
    {

        OMFactory fac = OMAbstractFactory.getOMFactory();
        OMNamespace omNs = fac.createOMNamespace("http://localhost:8080/axis2/services/FidsService", "fids");
        OMElement resp = fac.createOMElement("flightLeglist", omNs);
        for(Iterator it = flightLegInfoList.iterator(); it.hasNext(); )
        {
            FlightLegInfo flightLegInfo = (FlightLegInfo)it.next();

         OMElement record = fac.createOMElement("record", omNs);
         OMElement flightNoElement = fac.createOMElement("flightNo", omNs);
         OMElement tailNoElement = fac.createOMElement("tailNo", omNs);
         flightNoElement.addChild(fac.createText(flightNoElement, flightLegInfo.getFlightNo()));
         tailNoElement.addChild(fac.createText(tailNoElement, flightLegInfo.getTailNo()));
         record.addChild(flightNoElement);
         record.addChild(tailNoElement);
         resp.addChild(record);
        }
        return resp;
    }

代码的含义是�q�回包含flightNo和tailNo的record列表, 构造成XML�?

web-inf\services.xml 如下:

< service name ="FidsService" >
     < description >
        This is a fids web service.
     description >
     < parameter name ="ServiceClass" locked ="false" > com.cea2.service.fids.ServiceProxy parameter >
     < operation name ="getPVGFlightLegs" >
         < messageReceiver class ="org.apache.axis2.receivers.RawXMLINOutMessageReceiver" />
     operation >

service >

然后把所有的class,lib,web-inf\services.xml �{�组�l��v�?打个jar�? �q�改后缀为aar (�q�个�q�程有个eclipse插�gAxis2_Service_Archiver可以完成�q�个�q�程, 但不太会�? �q�事先需�?wsdl文�g??), �q�拷贝到Program Files\Apache Software Foundation\Tomcat 5.5\webapps\axis2\WEB-INF\services\�? 然后重启tomcat, �q�入http://localhost:8080/axis2/ 看services, 里面�?a href="http://localhost:8080/axis2/services/FidsService?wsdl">FidsService, 点击可以看到wsdl, 服务端算成功大半�?

客户�? 在做�q�回自定义对象的时�? 用了几个eclipse自动生成工具, 甚至�q�用了axis2自带命��o行wsdl2java, 都不�? 改�ؓ�q�回OMElement的时�? ��干脆没有用gererator, 直接写了testClient�c? �q�把service端中的FlightLegInfo(对应单条记录对象)拯��q�来. testClient如下

package test;

import org.apache.axis2.AxisFault;
import org.apache.axis2.Constants;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.client.ServiceClient;
import org.apache.ws.commons.om.OMElement;
import org.apache.ws.commons.om.OMNode;

import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
* Sample for synchronous single channel blocking service invocation.
* Message Exchage Pattern IN-OUT
*/
public class testClient {
     private static EndpointReference targetEPR = new EndpointReference( " http://localhost:8080/axis2/services/FidsService " );

     public static void main(String args[]) {
         try {


            OMElement payload = ClientUtil.getEchoOMElement();
            Options options = new Options();
            options.setTo(targetEPR);
            options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
            options.setAction( " getPVGFlightLegs " );

             // Blocking invocation
            ServiceClient sender = new ServiceClient();
            sender.setOptions(options);
            OMElement result = sender.sendReceive(payload);

             // 昄��xml
            StringWriter writer = new StringWriter();
            result.serialize(XMLOutputFactory.newInstance()
                    .createXMLStreamWriter(writer));
            writer.flush();

            System.out.println(writer.toString());
             // System.out.println("first:");
             // �l�果转换为list
            List list = getResults(result);
        } catch (AxisFault axisFault) {
            axisFault.printStackTrace();
        }    catch (XMLStreamException e) {
            e.printStackTrace();
        }
    }

     private static List getResults(OMElement element) {
        Iterator iterator = element.getChildElements();
        List list = new ArrayList();
         while (iterator.hasNext()) {
            OMNode omNode = (OMNode) iterator.next();
             if (omNode.getType() == OMNode.ELEMENT_NODE) {
                OMElement omElement = (OMElement) omNode;
                 if ( omElement.getLocalName().equals( " record " ) ) {
                    FlightLegInfo flightLegInfo = getFlightLegInfo(omElement);
                    list.add(flightLegInfo);
                }
            }
        }
         return null ;
    }

     private static FlightLegInfo getFlightLegInfo(OMElement element)
     {
        FlightLegInfo flightLegInfo = new FlightLegInfo();
        Iterator iterator = element.getChildElements();
         while (iterator.hasNext()) {
            OMNode omNode = (OMNode) iterator.next();
             if (omNode.getType() == OMNode.ELEMENT_NODE) {
                OMElement omElement = (OMElement) omNode;
                 if ( omElement.getLocalName().equals( " flightNo " ) ) {
                    flightLegInfo.setFlightNo(omElement.getText());
                    System.out.println( " flightNo: " + omElement.getText());
                }
                 if ( omElement.getLocalName().equals( " tailNo " ) ) {
                    flightLegInfo.setTailNo(omElement.getText());
                }
            }
        }
         return flightLegInfo;
    }
}

需要自��p�{换成FlightLegInfo 的list, 图方�? 直接在�{换函数里面打��C��一些测试输出数�? ��是完成了service的开�?

kuse的java��水�?/a> 2006-05-09 17:28 发表评论

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