Axis2是全新设计的，大家可以试试采用新的架构来让Axis更加的富有弹性，更有效率，并且更加的可配置。Axis2现在具有的一些feature:
Speed
Low memory foot print
AXIOM - AXis Object Model
Hot Deployment
Asynchronous Web Services
MEP Support -
Message Exchange Patterns
Flexibility
Stability
Component-oriented deployment
Transport framework
WSDL support
有些feature现在看不懂，还是先动手做一下，感性认识一下吧
第一步:下载AXIS2。http://ws.apache.org/axis2/download.cgi 。很有趣，在apache的Web Service的Project目录下面还看不到AXIS2。要下那个binary的版本，因为里面有例程。
第二步:Copy axis2.war到$TOMCAT_HOME/webapps目录下面。Tomcat好像只能用JDK1.4，我在JDK1.5用不出来。
第三步:打开http://localhost:8080/axis2 ，就可以看到axis2的Welcome页面了。点一下Validate和Services，看是不是都没有错误。都没有错误的话，就表示deploy成功了。那个adminstration页面可以通过上传文件来hot deploy Web service，可以用来remote deploy。
第四步:研究例程。先从"samples/userguide/src"目录下的例程看起。看到写一个web service很简单嘛:
public class MyService
{
public OMElement echo(OMElement element)
throws XMLStreamException {
//Praparing the OMElement so that
it can be attached to another OM Tree.
//First the OMElement should be
completely build in case it is not
fully built and still
//some of the xml is in the stream.
element.build();
//Secondly the OMElement should be
detached from the current OMTree
so that it can be attached
//some other OM Tree. Once detached
the OmTree will remove its connections
to this OMElement.
element.detach();
return element;
}
public void ping(OMElement element)
throws XMLStreamException
{
//Do some processing
}
public void pingF(OMElement element)
throws AxisFault{
throw new AxisFault
("Fault being thrown");
}
}
看得出来，函数统一使用OMElement作为参数。在META-INF目录下面有个services.xml文件:
＜service name="MyService"＞
＜description＞
This is a sample Web Service
with two operations,echo and ping.
＜/description＞
＜parameter name="ServiceClass"
locked="false"＞userguide.example1.
MyService＜/parameter＞
＜operation name="echo"＞
＜messageReceiver
class="org.apache.axis2.receivers.
RawXMLINOutMessageReceiver"/＞
＜/operation＞
＜operation name="ping"＞
＜messageReceiver
class="org.apache.axis2.receivers.
RawXMLINOnlyMessageReceiver"/＞
＜/operation＞
＜/service＞
呵呵，也很简单嘛。有返回值的就用RawXMLINOutMessageReceiver，没返回值的就用 RawXMLINOnlyMessageReceiver。把它们编译(要把axis2的jar写到classpath里去)打包压到 MyService.aar，包里文件目录如下:
./\META-INF/services.xml
./userguide/example1/MyService.class
把MyService.aar拷贝到$TOMCAT_HOME/webapps/axis2/WEB-INF/services，然后去点一下 http://localhost:8080/axis2页面上的Services，也就是http://localhost: 8080/axis2/listServices.jsp，就可以看到MyService已经被列出来了。
