基于JAX-WS的Web Service服务端/客户端

JAX-WS简介:

JAX_RPC(Java API for XML-Based RPC)允许Java应用程序可以通过已知的描述信息调用一个基于Java的Web服务,描述信息与Web服务的WSDL描述相一致

JAX-RPC2.0更名为JAX-WS2.0(Java API for XML-Based Web Services)

JAX-WS中,一个远程调用可以转换为一个基于XML的协议,如SOAP。开发者在使用JAX-WS的过程中,不需要编写任何生成、处理SOAP消息的代码,JAX-WS在运行时自动将API的调用转换为相应的SOAP消息

在服务器端,用户只需要通过Java语言定义远程调用所需实现的接口,并提供相应实现,通过调用JAX-WS的服务发布接口即可将其发布为WebService接口

在客户端,用户可以通过JAX-WS的API创建一个代理来实现对于远程服务器端的调用

 

JAX-WS服务端:

JAX-WS服务端采用注释描述WebService,不再依赖WebService描述文件

使用JDK1.6_45(JDK1.5中不包含所需类)

package com.sean.server;

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;

@WebService
public interface Plus {
	
	@WebMethod
	public int plus(@WebParam(name="x") int x,@WebParam(name="y") int y);
}
package com.sean.server;

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;

@WebService
public class PlusImpl implements Plus {
	
	@WebMethod
	public int plus(@WebParam(name="x") int x, @WebParam(name="y") int y) {
		return x + y;
	}
}
package com.sean.server;

import javax.xml.ws.Endpoint;

public class Server {
	public static void main(String[] args) {
		PlusImpl plus = new PlusImpl();
		String addr = "http://127.0.0.1:8888/Plus";
		Endpoint.publish(addr, plus);
	}
}

程序启动后,访问http://127.0.0.1:8888/Plus?wsdl即可查看自动生成的WSDL文件

<?xml version="1.0" encoding="UTF-8"?>
<!-- Published by JAX-WS RI at http://jax-ws.dev.java.net. RI's version is 
	JAX-WS RI 2.1.6 in JDK 6. -->
<!-- Generated by JAX-WS RI at http://jax-ws.dev.java.net. RI's version is 
	JAX-WS RI 2.1.6 in JDK 6. -->
<definitions name="PlusImplService" targetNamespace="http://server.sean.com/"
	xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	xmlns:tns="http://server.sean.com/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
	<types>
		<xsd:schema>
			<xsd:import schemaLocation="http://127.0.0.1:8888/Plus?xsd=1"
				namespace="http://server.sean.com/" />
		</xsd:schema>
	</types>
	<message name="plus">
		<part name="parameters" element="tns:plus" />
	</message>
	<message name="plusResponse">
		<part name="parameters" element="tns:plusResponse" />
	</message>
	<portType name="PlusImpl">
		<operation name="plus">
			<input message="tns:plus" />
			<output message="tns:plusResponse" />
		</operation>
	</portType>
	<binding name="PlusImplPortBinding" type="tns:PlusImpl">
		<soap:binding style="document"
			transport="http://schemas.xmlsoap.org/soap/http" />
		<operation name="plus">
			<soap:operation soapAction="" />
			<input>
				<soap:body use="literal" />
			</input>
			<output>
				<soap:body use="literal" />
			</output>
		</operation>
	</binding>
	<service name="PlusImplService">
		<port name="PlusImplPort" binding="tns:PlusImplPortBinding">
			<soap:address location="http://127.0.0.1:8888/Plus" />
		</port>
	</service>
</definitions>

使用 SoapUI5.0.0尝试用上面的WSDL创建WebService服务端报错(org.apache.xmlbeans.XmlException:error:does not close tag.)

使用SoapUI4.5.2则一切正常,只能归咎于不同版本的SoapUI对文件格式校验不同

 

JAX-WS客户端:

package com.sean.client;

import java.net.URL;

import javax.xml.namespace.QName;
import javax.xml.ws.Service;

import com.sean.server.Plus;

public class Client {
	public static void main(String[] args) throws Exception {
		QName serviceName = new QName("http://server.sean.com/", "PlusImplService");
		QName portName = new QName("http://server.sean.com/", "PlusImplPort");
		
		String addr = "http://127.0.0.1:8888/Plus?wsdl";
		URL url = new URL(addr);
		
		Service service = Service.create(url, serviceName);
		Plus plus = service.getPort(portName,Plus.class);
		//Plus plus = service.getPort(Plus.class);
		
		int result = plus.plus(1, 2);
		System.out.println("result:" + result);
	}
}

使用Plus plus = service.getPort(Plus.class)方法时,客户端调用时报错:

Exception in thread "main" javax.xml.ws.WebServiceException: Undefined port type: {http://server.sean.com/}Plus

解决方式一:

如客户端示例,将Plus plus = service.getPort(Plus.class)修改为Plus plus = service.getPort(portName,Plus.class)

解决方式二:

修改PlusImpl类的@WebService标记修改为@WebService(endpointInterface="com.sean.server.Plus")

参考:http://stackoverflow.com/questions/13417454/javax-xml-ws-webserviceexception-undefined-port-type-java-struts-soap-wsdl 

 

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