一、jax-ws webservice的编写流程之代码优先

之前写webservice程序基本上用axis或xfire，最近的一个项目用到了jax-ws，研究了一下，总结一下内容。webservice的实现一般有两种方式：代码优先和契约优先。所谓的契约优先就是在实现前，先定义一个数据交换格式，这样大家在实现的时候就有统一的规范可依，这对于大系统设计而言是非常必要的；本文先讲述的是代码优先的方式，具体步骤：

1、设计一个webservice的接口

package gjs.text.ws.inter;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
/**
 * 定义一个webservice接口
 * @author gaojingsheng
 *
 */
@WebService
public interface TestService {
	/**
	 * 求和
	 * @param a 加数a
	 * @param b 加数b
	 * @return 
	 */
	@WebResult(name = "sumResult")
	public int sum(@WebParam(name = "a") int a, @WebParam(name = "b") int b);

	/**
	 * 添加一个人，返回被添加的人
	 * @param person 
	 * @return
	 */
	@WebResult(name = "person")
	public Person addPerson(@WebParam(name = "person") Person person);
}

 这里需要注意的是，你需要熟悉三个annotation：@WebService、@WebResult、@WebParam。@WebService指定服务断点接口（SEI）；@WebResult指定返回的结果的包装的元素名称；@WebParam表示封装请求参数的名称

2、实现服务接口（SIB）

package gjs.text.ws.inter;

import java.util.ArrayList;
import java.util.List;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;

@WebService(endpointInterface="gjs.text.ws.inter.TestService")
public class TestServiceImpl implements TestService{
	//先定义一个存储队列
	private List<Person> personList = new ArrayList<Person>();

	@Override
	@WebResult(name = "sumResult")
	public int sum(@WebParam(name = "a") int a, @WebParam(name = "b") int b) {
		return a+b;
	}

	@Override
	@WebResult(name = "person")
	public Person addPerson(@WebParam(name = "person") Person person) {
		this.personList.add(person);
		return person;
	}

}

3、发布服务

package startService;

import javax.xml.ws.Endpoint;

import gjs.test.service.MyServiceImpl;

/**
 * 用于启动webservice,启动方式就是用Endpoint的publish方法
 * @author gaojingsheng
 *
 */
public class StartService {
	public static void main(String[] args) {
		//jaxws的发布服务的方式
		Endpoint.publish("http://localhost:8889/testService", new TestServiceImpl());
	}
}

 4、看看我们发布效果（wsdl文件）

This XML file does not appear to have any style information associated with it. The document tree is shown below.
<!--
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 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://inter.ws.text.gjs/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.xmlsoap.org/wsdl/"targetNamespace="http://inter.ws.text.gjs/" name="TestServiceImplService">
<types>
<xsd:schema>
<xsd:import namespace="http://inter.ws.text.gjs/" schemaLocation="http://localhost:8889/testService?xsd=1"/>
</xsd:schema>
</types>
<message name="sum">
<part name="parameters" element="tns:sum"/>
</message>
<message name="sumResponse">
<part name="parameters" element="tns:sumResponse"/>
</message>
<message name="addPerson">
<part name="parameters" element="tns:addPerson"/>
</message>
<message name="addPersonResponse">
<part name="parameters" element="tns:addPersonResponse"/>
</message>
<portType name="TestService">
<operation name="sum">
<input message="tns:sum"/>
<output message="tns:sumResponse"/>
</operation>
<operation name="addPerson">
<input message="tns:addPerson"/>
<output message="tns:addPersonResponse"/>
</operation>
</portType>
<binding name="TestServiceImplPortBinding" type="tns:TestService">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<operation name="sum">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="addPerson">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
</binding>
<service name="TestServiceImplService">
<port name="TestServiceImplPort" binding="tns:TestServiceImplPortBinding">
<soap:address location="http://localhost:8889/testService"/>
</port>
</service>
</definitions>

 到此，一个简单的服务就搭建完成了。