webservice的调用

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本文介绍三种调用远程WebService的方法：使用AXIS库、SOAP API及Spring WS框架。涵盖直接调用、SOAP消息构建及基于Schema的服务发布流程。

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1,直接AXIS调用远程的web service

import java.util.Date;

import java.text.DateFormat;

import org.apache.axis.client.Call;

import org.apache.axis.client.Service;

import javax.xml.namespace.QName;

import java.lang.Integer;

import javax.xml.rpc.ParameterMode;

public class caClient {

public static void main(String[] args) {

try {

String endpoint = "http://localhost:8080/ca3/services/caSynrochnized?wsdl";

//直接引用远程的wsdl文件

//以下都是套路
Service service = new Service();

Call call = (Call) service.createCall();

call.setTargetEndpointAddress(endpoint);

call.setOperationName("addUser");//WSDL里面描述的接口名称

call.addParameter("userName", org.apache.axis.encoding.XMLType.XSD_DATE,

javax.xml.rpc.ParameterMode.IN);//接口的参数

call.setReturnType(org.apache.axis.encoding.XMLType.XSD_STRING);//设置返回类型

String temp = "测试人员";
String result = (String)call.invoke(new Object[]{temp});

//给方法传递参数，并且调用方法

System.out.println("result is "+result);

}

catch (Exception e) {

System.err.println(e.toString());

}

2,直接SOAP调用远程的webservice

这种模式我从来没有见过，也没有试过，但是网络上有人贴出来，我也转过来

import org.apache.soap.util.xml.*;

import org.apache.soap.*;

import org.apache.soap.rpc.*;

import java.io.*;

import java.net.*;

import java.util.Vector;

public class caService{

public static String getService(String user) {

URL url = null;

try {

url=new URL("http://192.168.0.100:8080/ca3/services/caSynrochnized");

} catch (MalformedURLException mue) {

return mue.getMessage();

}

// This is the main SOAP object

Call soapCall = new Call();

// Use SOAP encoding

soapCall.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);

// This is the remote object we're asking for the price

soapCall.setTargetObjectURI("urn:xmethods-caSynrochnized");

// This is the name of the method on the above object

soapCall.setMethodName("getUser");

// We need to send the ISBN number as an input parameter to the method

Vector soapParams = new Vector();

// name, type, value, encoding style

Parameter isbnParam = new Parameter("userName", String.class, user, null);

soapParams.addElement(isbnParam);

soapCall.setParams(soapParams);

try {

// Invoke the remote method on the object

Response soapResponse = soapCall.invoke(url,"");

// Check to see if there is an error, return "N/A"

if (soapResponse.generatedFault()) {

Fault fault = soapResponse.getFault();

String f = fault.getFaultString();

return f;

} else {

// read result

Parameter soapResult = soapResponse.getReturnValue ();

// get a string from the result

return soapResult.getValue().toString();

}

} catch (SOAPException se) {

return se.getMessage();

}

3,使用wsdl2java把WSDL文件转成本地类，然后像本地类一样使用，即可。

==========================================

总结：以上是前几年老的调用方式。都需要基于wsdl进行发布。进入spring-ws之后。我们的webservice开发流程是

1. 设计schema文件

2. 服务器端使用一个servlet发布webservice：servlet在web环境成功加载后，根据servlet中DefaultWsdl11Definition配置的id，访问wsdl路径(比如: http://localhost:8888/synchronize/synchronize.wsdl)，即可看到wsdl --> webservice成功发布。

实现AbstractFaultCreatingValidatingMarshallingPayloadEndpoint

为endpoint类，配置context 文件

<bean id="webservice-***-endpoint" class="nl.enovation.lspconnect.console.interfaces.SynchronizeConfigurationEndpoint">
<property name="marshaller" ref="synchronize-configuration-marshaller" />
<property name="unmarshaller" ref="synchronize-configuration-marshaller" />
<property name="addValidationErrorDetail" value="true" />
</bean>

<bean id="synchronize-configuration-marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">

<property name="contextPath" value="jaxb包路径：cn.inovation.hotshare.synchronize.jaxb" />
<property name="schema">
<value>/WEB-INF/schemas/configuration/synchoronization.xsd</value>
</property>
</bean>

在Servlet文件中，定义bean; org.springframework.ws.wsdl.wsdl11.DefaultWsdl11Definition, 指定xsd文件, soapAction等webservice信息

<bean id="synchronize"
class="org.springframework.ws.wsdl.wsdl11.DefaultWsdl11Definition">
<property name="schema">
<bean class="org.springframework.xml.xsd.SimpleXsdSchema">
<property name="xsd"
value="/WEB-INF/schemas/configuration/***-configuration.xsd" />
</bean>
</property>
<property name="portTypeName" value="project-information" />
<property name="locationUri"
value="http://www.some-domain.org/synchronize/" />
<property name="targetNamespace"
value="http://www.enovation.nl/schemas/hotshare/synchronize" />
<property name="soapActions">
<value>
synchronize={http://www.enovation.nl/schemas/hotshare/synchronize}synchronize
</value>
</property>
</bean>

3. 客户端

配置：利用maven使客户端项目依赖xsd文件，使用jaxb2-maven-plugin，将xsd文件输出成jaxb object. 则可以直接使用本地对象完成webservice需要的创建过程。

实现：

====================================

WebServiceMessageCallback callback = new WebServiceMessageCallback() {

public void doWithMessage(final WebServiceMessage message) throws IOException, TransformerException {
((SoapMessage) message).setSoapAction(connectSoapAction);
Transformer newTransformer = TransformerFactory.newInstance().newTransformer();
StringResult stringResult = new StringResult();
newTransformer.transform(((SoapMessage) message).getSoapBody().getSource(), stringResult);
log.debug("send update message: " + stringResult.toString());
}

};
try {
lspConnectWebServiceOperations.marshalSendAndReceive(connectUrl, message, callback);