WebService：CXF的JaxWsDynamicClientFactory实现调用WebService接口

首先需要引入依赖jar包

#版本只供参考，具体看项目
<dependency>
        <grouId>org.apache.cxf</grouId>
        <artifactId>cxf-rt-frontend-jaxws</artifactId>
        <version>3.1.6</version>
</dependency>
<dependency>
        <grouId>org.apache.cxf</grouId>
        <artifactId>cxf-rt-transports-http</artifactId>
        <version>3.1.6</version>
</dependency>

JaxWsDynamicClientFactory

 简介：只要指定服务器端wsdl文件的位置，然后指定要调用的方法和方法的参数即可，不关心服务端的实现方式。

public class Client3 {  
    
public static void main(String[] args) throws Exception {  
        //方法名
        String method = "sayHello"
        //参数
        String param = "KEVIN"
         //实例化JaxWsDynamicClientFactory
        JaxWsDynamicClientFactory clientFactory = JaxWsDynamicClientFactory.newInstance();  
        //通过wsdl路径生成客户端实体
        Client client = clientFactory.createClient("http://localhost:9090/helloWorldService?wsdl");  
        //调用方法传参
        Object[] result = client.invoke(method, param);  
        //打印回值
        System.out.println(result[0]);  
    }  

}

webservie报错：远程主机强迫关闭了一个现有的连接。

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection:远程 主机强迫关闭了一个现有的连接。. ---> System.Net.Sockets.SocketException: 远程主机强迫关闭了一个现有的连接。
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   --- End of inner exception stack trace ---
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
   --- End of inner exception stack trace ---
   at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at EnterpriseServerBase.WebService.DynamicWebCalling.HdyyElectronicService.doDownloadRecipeInfo(String userName, String password, String senderCode)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at XmlTrans.Core.WSHelperCore.InvokeWebServiceMethod(String methodname, Object[] args)

原因：

经验证，如果数据稍微大点，比如3-4M，有时候可以通过稍微调大等待超时时长来解决问题，但是如果数据偏大的话，比如10M，调大等待超时时长也无济于事，Socket连接很快会被干掉，只要数据一直这么大，连接就会被不断的干掉。

总结：

webservice只适用于小数据的传输，不要尝试使用webservice进行大数据的传输。

解决办法：

public class Client3 {  
    
public static void main(String[] args) throws Exception {  
        //方法名
        String method = "sayHello"
        //参数
        String param = "KEVIN"
         //实例化JaxWsDynamicClientFactory
        JaxWsDynamicClientFactory clientFactory = JaxWsDynamicClientFactory.newInstance();  
        //通过wsdl路径生成客户端实体
        Client client = clientFactory.createClient("http://localhost:9090/helloWorldService?wsdl");  
       
        HTTPConduit http = (HTTPConduit)client.getConduit();
        //策略
        HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
        //连接超时(1分钟)
        httpClientPolicy.setConnectionTimeout(1 * 60000);
        httpClientPolicy.setAllowChunking(false);
        //响应超时(1分钟)
        httpClientPolicy.setReceiveTimeout(1 * 60000);
        http.setClient(httpClientPolicy);
        //调用方法传参
        Object[] result = client.invoke(method, param);  
        //打印回值
        System.out.println(result[0]);  
    }  

}

作者：怒吼的萝卜