对于自己写出java类后，编写services.xml然后生成wsdl，这个过程我已经理解，但是对于从wsdl生成java类这个方向却不是太理解，因为你得自己生成一个wsdl，并且这个文件要能代表你要生成的那个类，就比如一个简单的类，一个接口，一个实现类，名字分别是TestInterface ,实现类是Test,实现了一个方法public String getName(String str,int price){
return str+price;
}
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复杂的如：

Generating a Client using XMLBeans
To build a client using the XML Beans data bindings, execute the following steps.

Generate the databings by typing the following in the xmlbeansClient directory.

%AXIS2_HOME%\bin\WSDL2Java -uri resources\META-INF\StockQuoteService.wsdl -p samples.quickstart.service.xmlbeans -d xmlbeans -s -o build\client
Else, simply type ant generate.client in the Axis2_HOME/samples/quickstartxmlbeans directory.

Note that this creates a client stub code and no server side code.

Next take a look at quickstartxmlbeans/src/samples/quickstart/clients/XMLBEANSClient.java, and see how it's defined in Code Listing 11.

Code Listing 11: The XMLBEANSClient class

package samples.quickstart.clients;

import samples.quickstart.service.xmlbeans.StockQuoteServiceStub;
import samples.quickstart.service.xmlbeans.xsd.GetPriceDocument;
import samples.quickstart.service.xmlbeans.xsd.GetPriceResponseDocument;
import samples.quickstart.service.xmlbeans.xsd.UpdateDocument;

public class XMLBEANSClient{

    public static void main(java.lang.String args[]){
        try{
            StockQuoteServiceStub stub =
                new StockQuoteServiceStub
                ("http://localhost:8080/axis2/services/StockQuoteService");

            getPrice(stub);
            update(stub);
            getPrice(stub);

        } catch(Exception e){
            e.printStackTrace();
            System.err.println("\n\n\n");
        }
    }

    /* fire and forget */
    public static void update(StockQuoteServiceStub stub){
        try{
            UpdateDocument reqDoc = UpdateDocument.Factory.newInstance();
            UpdateDocument.Update req = reqDoc.addNewUpdate();
            req.setSymbol ("BCD");
            req.setPrice (42.32);

            stub.update(reqDoc);
            System.err.println("price updated");
        } catch(Exception e){
            e.printStackTrace();
            System.err.println("\n\n\n");
        }
    }

    /* two way call/receive */
    public static void getPrice(StockQuoteServiceStub stub){
        try{
            GetPriceDocument reqDoc = GetPriceDocument.Factory.newInstance();
            GetPriceDocument.GetPrice req = reqDoc.addNewGetPrice();
            req.setSymbol("BCD");

            GetPriceResponseDocument res =
                stub.getPrice(reqDoc);

            System.err.println(res.getGetPriceResponse().getReturn());
        } catch(Exception e){
            e.printStackTrace();
            System.err.println("\n\n\n");
        }
    }
}
This class creates a client stub using the XML Beans data bindings you created. Then it calls the getPrice and the update operations on the Web service. The getPrice method operation creates the GetPriceDocument, its inner GetPrice classes and sets the symbol to ABC. It then sends the request and retrieves a GetPriceResponseDocument and displays the current price. The update method creates an UpdateDocument, updates and sets the symbol to ABC and price to 42.32, displaying 'done' when complete.

Now build and run the the project by typing ant run.client in the Axis2_HOME/samples/quickstartxmlbeans directory.

You should get the following as output:

42
price updated
42.32
========================
这个是axis2中自己带的，它要生成
import samples.quickstart.service.xmlbeans.StockQuoteServiceStub;
import samples.quickstart.service.xmlbeans.xsd.GetPriceDocument;
import samples.quickstart.service.xmlbeans.xsd.GetPriceResponseDocument;
这些类，那那个wsdl要怎么写啊，很麻烦啊，我对这个逆向过程不是太理解，有谁可以帮忙解释下，多谢！！！

调用别人写好的WebService的客户端需要根据提供的wsdl生成代码才能使用
axis2提供了eclipse插件，可以很简单的生成客户端代码
也可以通过调用axis2提供的批处理文件进行客户端的自动生成
如果用的是xfire的话使用ant也可以很简单的生成出来
CXF我还没用过，就不知道了。

使用cxf的wsdl2java命令即可生成webservice的客户端也可生成服务端。
xfire和axis1已经全面过时了。要么axis2要么cxf。

你可以直接写WSDL，干嘛要从类哪里生成呢？