WebService的一个有关问题

WebService的一个问题
使用axis2-1.6.1开发webservice(Eclipse-jee-3.7，axis2-1.6.1，Tomcat-6.0.24)

网上找的例子，
ComplexTypeService类：

Java code

import data.User;public class ComplexTypeService {        public String[][] getTwoArray() {        return new String[][] { { "中国", "北京" }, { "日本", "东京" }, { "中国", "上海", "南京" } };    }    public User getUser() {        User user = new User(0, "Jack", "Beijing");        return user;    }}

User类：

Java code

package data;import java.io.Serializable;public class User implements Serializable {    private static final long serialVersionUID = 1715338269623256997L;        private int id;    private String name;    private String address;    public User(int id, String name, String address) {        super();        this.id = id;        this.name = name;        this.address = address;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }}

下面就是部署了。

1.axis2.war包放到tomcat的webapps下解压为axis2的目录。
2.将ComplexTypeService.class文件放置到TOMCAT_HOME\webapps\axis2\WEB-INF\pojo目录下。
3.将User.class文件放置到TOMCAT_HOME\webapps\axis2\WEB-INF\data目录下（data就是User类所在的包名，自己新建的）。
网上查到另外的版本，说User.class文件应该放置在TOMCAT_HOME\webapps\axis2\WEB-INF\classes\data目录下。
这两个方法都试过了，可惜客户端调用的时候，都是找不到data.User类。

写客户端调用程序：

Java code

package webservice;import javax.xml.namespace.QName;import org.apache.axis2.AxisFault;import org.apache.axis2.addressing.EndpointReference;import org.apache.axis2.client.Options;import org.apache.axis2.rpc.client.RPCServiceClient;import data.User;public class ComplexTypeServiceClient {    public static void main(String[] args) {        RPCServiceClient rpcServClient = null;        try {            rpcServClient = new RPCServiceClient();        } catch (AxisFault e) {            e.printStackTrace();        }        Options options = rpcServClient.getOptions();        String url = "http://localhost:8080/axis2/services/ComplexTypeService";        EndpointReference endpointRef = new EndpointReference(url);        options.setTo(endpointRef);        //第一个服务        QName qname = new QName("http://ws.apache.org/axis2", "getTwoArray");        Object[] result = null;            try {            result = rpcServClient.invokeBlocking(qname, new Object[] {}, new Class[] { String[][].class });        } catch (AxisFault e) {            e.printStackTrace();        }        String[][] strss = (String[][]) result[0];        for (String[] strs : strss) {            for (String str : strs) {                System.out.print(str + '\t');            }            System.out.println();        }        //第二个服务        qname = new QName("http://ws.apache.org/axis2", "getUser");        try {            result = rpcServClient.invokeBlocking(qname, new Object[] {}, new Class[] { data.User.class });        } catch (AxisFault e) {            e.printStackTrace();        }                User user = (User)result[0];        System.out.println(user.getId());        System.out.println(user.getName());        System.out.println(user.getAddress());    }}

第一个服务调用成功，第二个服务始终不行，报如下错误：
org.apache.axis2.AxisFault: data.User

at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
at org.apache.axis2.engine.DefaultObjectSupplier.getObject(DefaultObjectSupplier.java:47)
at org.apache.axis2.databinding.utils.BeanUtil.deserialize(BeanUtil.java:421)
at org.apache.axis2.databinding.utils.BeanUtil.processObject(BeanUtil.java:827)
at org.apache.axis2.databinding.utils.BeanUtil.ProcessElement(BeanUtil.java:746)
at org.apache.axis2.databinding.utils.BeanUtil.deserialize(BeanUtil.java:655)
at org.apache.axis2.databinding.utils.BeanUtil.deserialize(BeanUtil.java:572)
at org.apache.axis2.rpc.client.RPCServiceClient.invokeBlocking(RPCServiceClient.java:104)
at webservice.ComplexTypeServiceClient.main(ComplexTypeServiceClient.java:47)
Caused by: java.lang.InstantiationException: data.User
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.axis2.engine.DefaultObjectSupplier.getObject(DefaultObjectSupplier.java:42)
... 7 more
Exception in thread "main" java.lang.ClassCastException: [[Ljava.lang.String; cannot be cast to data.User
at webservice.ComplexTypeServiceClient.main(ComplexTypeServiceClient.java:52)


请问这个是怎么回事？

[解决办法]
没遇到这样的错误

不过我想是不是你的data.User没有一个无参的构造函数，你加一个试试
[解决办法]
http://download.csdn.net/detail/s478853630/4200795
希望能给你帮助

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