基於Tomcat5.0和Axis2開發Web Service應用實例

本文將介紹如何使用Tomcat5.0Apache Axis2開發、部署及測試一個簡單的Web Service應用。
author: ZJ 07-3-12
 
1工做環境
Eclipse 3.1.2 +Lomboz+jdk1.5+ apache-tomcat-5.0.18+AXIS2:1.0(war版本和bin版本)
[url]http://ws.apache.org/axis2/download/1_0/download.cgi[/url]頁面下載AXIS2Binary Distribution url: [url]http://apache.justdn.org/ws/axis2/1_0/axis2-std-1.0-bin.zip[/url]war Distribution url: [url]http://apache.justdn.org/ws/axis2/1_0/axis2-1.0-docs.zip[/url]。把這兩個文件解壓,好比解壓縮的後得目錄爲C:\axis2-std-1.0-binC:\axis2.war
Eclipse下經過菜單window—preferences…--Java—Build Path—User Libraries 新建一個user library,好比名字就叫axis2C:\axis2-std-1.0-bin\lib下的全部jar文件包含進來。把axis2.war拷貝到%TOMCAT-HOME%/webapps下面。
 
2.檢驗安裝
Eclipse下啓動Tomcat,在地址欄內輸入[url]http://localhost:8080/axis2/[/url]
點擊Validate,將到達 Axis2 Happiness Page
3WebService中的HelloWorld
1)新建一個動態web工程,取名ZZaxis,右鍵點擊項目名,選擇Properties-Java Build Path-Add Library-User Library-axis2
 
2)新建package sample,創建HelloWorld.java,代碼以下。
HelloWorld.java
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
 
public class HelloWorld {
       public OMElement sayHello(OMElement in){
              String name=in.getText();
              String info=name+"HelloWorld!";
              OMFactory fac=OMAbstractFactory.getOMFactory();
              OMNamespace omNs=fac.createOMNamespace("http://helloworld.com/","hw");
              OMElement resp=fac.createOMElement("sayHelloResponse",omNs);
              resp.setText(info);
              return resp;
       }
}
 
3)在WebContent\META-INF\創建services.xml,代碼以下。
services.xml
<?xml version="1.0" encoding="UTF-8"?>
<service name="HelloWorld">
<description>
  This is a sample Web Service.
</description>
<parameter name="ServiceClass" locked="false">sample.HelloWorld</parameter>
<operation name="sayHello">
  <messageReceiver class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
</operation>
</service>
 
4)將目錄sample和目錄META-INF組織以下(新建目錄example)。
+-example
|-------- +-sample
    |------- HelloWorld.class
|---------+-META-INF
       |------- services.xml
 
5)打包生成aar文件。
在命令符環境下,將當前目錄轉到example
jar cvf HelloWorld.aar . //注意最後一個點,在當前目錄下生成HelloWorld.aar
 
6)在Eclipse中啓動Tomcat,在地址欄下鍵入[url]http://localhost:8080/axis2/[/url]。選擇Administration,輸入用戶名admin,密碼axis2。選擇左側工具欄Tools- Upload Service,上傳以前打包的HelloWorld.aar。該文件將在<CATALINA_HOME>/webapps/axis2\WEB-INF\services目錄下。
 
7)編寫客戶端檢驗代碼。新建Java Project,取名爲ZZaxisClient。右鍵點擊項目名,選擇Properties-Java Build Path-Add Library-User Library-axis2
 
8)新建package example.client。創建TestClient.java,代碼以下。
TestClient.java
package example.client;
 
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.client.ServiceClient;
 
public class TestClient {
       private static EndpointReference targetEPR=new EndpointReference
         ("http://localhost:8080/axis2/services/HelloWorld");
       public static OMElement getSayHelloOMElement(){
              OMFactory fac=OMAbstractFactory.getOMFactory();
              OMNamespace omNs=fac.createOMNamespace("http://helloworld.com/","hw");
              OMElement method=fac.createOMElement("sayHello",omNs);
              method.setText("ZJ");
              return method;
       }
       public static void main(String[] args){
              try{
                     Options options=new Options();
                     options.setTo(targetEPR);
                     ServiceClient sender=new ServiceClient();
                     sender.setOptions(options);
                     OMElement sayHello=TestClient.getSayHelloOMElement();
                     OMElement result=sender.sendReceive(sayHello);
                     System.out.println(result);
              }
              catch(Exception axisFault){
                     axisFault.printStackTrace();
              }
       }
}
 
9)測試,run TestClient.java as Java Application。結果:
<hw:sayHelloResponse xmlns:hw="http://helloworld.com/"
xmlns:tns="http://ws.apache.org/axis2">
ZJHelloWorld!
</hw:sayHelloResponse>
 
4.後續
詳細介紹clientserver端代碼。《基於Tomcat5.0和Axis2開發Web Service代碼詳解
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