5

我想检查不同平台之间的 SOAP 互操作性；我是一名 Java 程序员，尤其不了解 C#。

我在 C# 中做了什么：

转移对象：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Xml.Serialization;

[XmlRoot]
public class Pack
{
    private int id;
    private string name;

    public Pack()
    {   
    }

    public Pack(int anId, string aName)
    {
        this.id = anId;
        this.name = aName;
    }

    public void setId(int anId)
    {
        this.id = anId;
    }

    public int getId()
    {
        return id;
    }

    public void setName(string aName)
    {
        this.name = aName;
    }

    public string getName()
    {
        return name;
    }
}

网络服务：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Xml.Serialization;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class PackWS : System.Web.Services.WebService
{
    private Dictionary<int, Pack> dictionary;

    public PackWS()
    {
        dictionary = new Dictionary<int, Pack>();
    }

    [WebMethod]
    [XmlInclude(typeof(String))]
    public String getName()
    {
        return "Goodbye world!";
    }

    [WebMethod]
    [XmlInclude(typeof(Pack))]
    public void addPackage(Pack package)
    {
       dictionary.Add(package.getId(), package);
    }

    [WebMethod]
    [XmlInclude(typeof(Pack))]
    public Pack getPackage(int id)
    {
        return dictionary[id];
    }
}

项目在指定的 URI 处构建和发布 wsdl。我添加了一个 Java 客户端部分：

转移对象：

package user;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Pack {
    private int id;
    private String name;

    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;
    }
}

界面：

package user;

import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;

@WebService(targetNamespace = "http://tempuri.org/",
        portName = "PackWSSoap",
        wsdlLocation = "http://localhost:57265/Service.asmx?wsdl",
        serviceName = "PackWS")
@SOAPBinding(style = SOAPBinding.Style.RPC)
public interface PackWSSoap {
    void addPackage(Pack pack);
    Pack getPackage(int id);
    String getName();
}

服务

package user;

import javax.xml.namespace.QName;
import javax.xml.ws.Service;
import java.net.MalformedURLException;
import java.net.URL;

public class PackageClient {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://localhost:57265/Service.asmx?wsdl");
            QName qName = new QName("http://tempuri.org/", "PackWS");

            Service service = Service.create(url, qName);

            PackWSSoap packWS = service.getPort(PackWSSoap.class);

            System.out.println(packWS.getName());//null here

            packWS.addPackage(getPack());//C# exception here

            System.out.println(packWS.getPackage(getPack().getId()));//unreachable 


        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }

    static Pack getPack() {
        return new Pack(){{
            setId(2);
            setName("name");
        }
        };
    }
}

调用该getName()方法时，它应该返回一个简单的字符串，但它返回 null。当尝试通过调用添加包时，addPackage(pack)我在客户端上收到来自 C# 的异常，在 Java 中：

Exception in thread "main" javax.xml.ws.soap.SOAPFaultException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at PackWS.addPackage(Pack package) in f:\DS Projects\ds5\NET\App_Code\PackWS.cs:line 38
   --- End of inner exception stack trace ---
    at com.sun.xml.ws.fault.SOAP11Fault.getProtocolException(SOAP11Fault.java:163)
    at com.sun.xml.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:94)
    at com.sun.xml.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:236)
    at com.sun.xml.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:206)
    at com.sun.xml.ws.client.sei.SEIStub.invoke(SEIStub.java:103)
    at $Proxy18.addPackage(Unknown Source)
    at user.PackageClient.main(PackageClient.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

我不认为沟通有什么问题，因为异常通过得很好；但我相信我没有向 .NET 服务器添加任何内容。任何帮助将不胜感激，并对长篇文章感到抱歉。

这是WSDL：

<wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://tempuri.org/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://tempuri.org/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
<wsdl:types>
<s:schema elementFormDefault="qualified" targetNamespace="http://tempuri.org/">
<s:element name="getName">
<s:complexType/>
</s:element>
<s:element name="getNameResponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="getNameResult" type="s:string"/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="addPackage">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="package" nillable="true" type="tns:Pack"/>
</s:sequence>
</s:complexType>
</s:element>
<s:complexType name="Pack"/>
<s:element name="addPackageResponse">
<s:complexType/>
</s:element>
<s:element name="getPackage">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="id" type="s:int"/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="getPackageResponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="getPackageResult" nillable="true" type="tns:Pack"/>
</s:sequence>
</s:complexType>
</s:element>
</s:schema>
</wsdl:types>
<wsdl:message name="getNameSoapIn">
<wsdl:part name="parameters" element="tns:getName"/>
</wsdl:message>
<wsdl:message name="getNameSoapOut">
<wsdl:part name="parameters" element="tns:getNameResponse"/>
</wsdl:message>
<wsdl:message name="addPackageSoapIn">
<wsdl:part name="parameters" element="tns:addPackage"/>
</wsdl:message>
<wsdl:message name="addPackageSoapOut">
<wsdl:part name="parameters" element="tns:addPackageResponse"/>
</wsdl:message>
<wsdl:message name="getPackageSoapIn">
<wsdl:part name="parameters" element="tns:getPackage"/>
</wsdl:message>
<wsdl:message name="getPackageSoapOut">
<wsdl:part name="parameters" element="tns:getPackageResponse"/>
</wsdl:message>
<wsdl:portType name="PackWSSoap">
<wsdl:operation name="getName">
<wsdl:input message="tns:getNameSoapIn"/>
<wsdl:output message="tns:getNameSoapOut"/>
</wsdl:operation>
<wsdl:operation name="addPackage">
<wsdl:input message="tns:addPackageSoapIn"/>
<wsdl:output message="tns:addPackageSoapOut"/>
</wsdl:operation>
<wsdl:operation name="getPackage">
<wsdl:input message="tns:getPackageSoapIn"/>
<wsdl:output message="tns:getPackageSoapOut"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="PackWSSoap" type="tns:PackWSSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="getName">
<soap:operation soapAction="http://tempuri.org/getName" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="addPackage">
<soap:operation soapAction="http://tempuri.org/addPackage" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getPackage">
<soap:operation soapAction="http://tempuri.org/getPackage" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="PackWSSoap12" type="tns:PackWSSoap">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="getName">
<soap12:operation soapAction="http://tempuri.org/getName" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="addPackage">
<soap12:operation soapAction="http://tempuri.org/addPackage" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getPackage">
<soap12:operation soapAction="http://tempuri.org/getPackage" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="PackWS">
<wsdl:port name="PackWSSoap" binding="tns:PackWSSoap">
<soap:address location="http://localhost:57265/Service.asmx"/>
</wsdl:port>
<wsdl:port name="PackWSSoap12" binding="tns:PackWSSoap12">
<soap12:address location="http://localhost:57265/Service.asmx"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
4

3 回答 3

5

.NET 中的 Web 服务不维护请求之间的会话状态。当您初始化字典时，它仅在该特定请求的持续时间内存在。在随后的请求中，它再次为空，因此您得到了异常。

如果你想实现这样的服务，使用在请求之间持续存在的对象，你可以使用 Application 作为共享存储。不过，它看起来有点难看，因为您必须在访问它时键入 cast。

初始化：

Application["dictionary"] = new Dictionary<int, Pack>();

添加：

((Dictionary<int, Pack>)Application["dictionary"]).Add(package.getId(), package);

阅读：

return ((Dictionary<int, Pack>)Application["dictionary"])[id];

有关应用程序商店（HttpApplicationState 的一个实例）的更多信息，请访问http://msdn.microsoft.com/en-us/library/system.web.httpapplicationstate.aspx

于 2012-12-11T21:17:41.780 回答
2

如果不是绝对必要，我永远不会使用肥皂。我建议您使用 REST Web 服务将主体 JSON 对象放入其中。

于 2012-12-12T20:50:42.007 回答
1

您的 .asmx 文件（ASP.NET Web 服务）在哪里？

您得到的例外来自 PackWS.cs:line 38，它应该是 getPackage() web 方法。

当我运行 PackageClient 我得到

Dec 22, 2012 7:13:50 AM org.apache.cxf.service.factory.ReflectionServiceFactoryBean buildServiceFromWSDL
INFO: Creating Service {http://tempuri.org/}PackWS from WSDL: http://10.0.1.32:49232/PackWS.asmx?wsdl
Dec 22, 2012 7:13:51 AM org.apache.cxf.service.factory.ReflectionServiceFactoryBean buildServiceFromWSDL
INFO: Creating Service {http://tempuri.org/}PackWS from WSDL: http://10.0.1.32:49232/PackWS.asmx?wsdl
Hello world!

在.NET Web 服务上我得到

System.Collections.Generic.KeyNotFoundException was unhandled by user code
  HResult=-2146232969
  Message=The given key was not present in the dictionary.
  Source=mscorlib
  StackTrace:
       at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
       at PackWS.getPackage(Int32 id) in c:\Users\Vineet\Documents\Visual Studio 2012\Projects\PackWS\PackWS\PackWS.asmx:line 39
  InnerException:

要解决这个问题，请遵循 Scott 上面提到的内容。

查看 .NET Web 服务的整个源代码：

https://github.com/firefoxNX/StackOverflow/tree/master/PackWS

和 Java 客户端

https://github.com/firefoxNX/StackOverflow/tree/master/PackWSClient

于 2012-12-22T12:16:48.253 回答