如何在NetBeans 6中创建SOAP Web Services

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该博客将向你展示，如何在NetBeans 6中轻松创建Web Services项目。在这个项目中将用到NetBeans 6.0及其附带的JAX-WS 2.1。

一、Web Services Description Language(WSDL：Web Services 描述语言)

有很多种方式来创建Web Services。其中一种方式是首先创建WSDL文件。首先，你必需明确你的Web Services将要实现一个什么样的功能，从而确定它的输入和输出参数分别是什么。在这个实例中，只实现了一个名为getcalculateValues的操作，它将简单的求出两个数的和。即以两个数字作为输入参数，它们的和为输出参数。

首先创建一下两个文件：

webservices.wsdl
=================
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns:ns1="soapwebservices.jdevelop.eu" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:ns="http://schemas.xmlsoap.org/soap/encoding/" name="SOAPWebServices" targetNamespace="soapwebservices.jdevelop.eu">
    <types>
        <xsd:schema>
            <xsd:import namespace="soapwebservices.jdevelop.eu" schemaLocation="webservices.xsd"/>
        </xsd:schema>
    </types>
    <message name="calculateValues">
        <part name="calculateValues" element="ns1:calculateValues"/>
    </message>
    <message name="calculateValuesResponse">
        <part name="calculateValuesResponse" element="ns1:calculateValuesResponse"/>
    </message>
    <portType name="SOAPWebServices">
        <operation name="getCalculateValues">
            <input message="ns1:calculateValues"/>
            <output message="ns1:calculateValuesResponse"/>
        </operation>
    </portType>
    <binding name="SOAPWebServicesPortBinding" type="ns1:SOAPWebServices">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <operation name="getCalculateValues">
            <soap:operation soapAction="urn:http://blog.jdevelop.eu/services/getCalculateValues"/>
            <input>
                <soap:body use="literal"/>
            </input>
            <output>
                <soap:body use="literal"/>
            </output>
        </operation>
    </binding>
    <service name="SOAPService">
        <port name="WebServices" binding="ns1:SOAPWebServicesPortBinding">
            <soap:address location="http://blog.jdevelop.eu:80/services"/>
        </port>
    </service>
</definitions>

webservices.xsd
=================
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema xmlns:ns1="http://blog.jdevelop.eu/soapwebservices.xsd" xmlns:tns="soapwebservices.jdevelop.eu" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="soapwebservices.jdevelop.eu" version="1.0">
   <xs:element name="calculateValues">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="value1" type="xs:decimal"/>
                <xs:element name="value2" type="xs:decimal"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:element name="calculateValuesResponse">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="result" type="xs:decimal"/>
                <xs:element name="errormessage" type="xs:string" minOccurs="0"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

二、创建NetBeans工程

打开NetBeans，新建一个Web Application工程，并命名为SOAPWebServices。将上下文路径文本框清空，点击完成按钮。

【个人注解】在这里创建工程时，请选择Tomcat 6作为服务器，否则后面的步骤可能会有所不同。

依次进入菜单File->New File->Web Services，选择Web Service from WSDL。如果您找不到此菜单，那么需要先安装插件“Web Service Plugin”（Tools->Plugins->Available Plugins）。

输入Web Services的名字ServiceImpl，包名为eu.jdevelop.soapwebservices.service，然后将WSDL文件输入框指向你先前创建的wsdl定义文件。

点击完成按钮。
下面是为你的Web Services定义正确的URL。打开sun-jaxws.xml，将其中的url-pattern属性设置为“/soapwebservices”。

同样修改web.xml文件中相应位置。

编辑index.jsp，将一下代码插入到<body></body>标签中：
<jsp:forward page="soapwebservices"></jsp:forward>

到这一步，就可以测试你的Web Services了。右击项目，选择清空并生成。然后运行项目。

在浏览器中输入http://localhost:8080/，回车后可以看到测试效果。点击其中的 Information->WSDL链接，可以查看其WSDL和XML-Schema。
下面就可以实现对应的业务逻辑了。
ServiceImpl.java
=================
package eu.jdevelop.soapwebservices.service;

import eu.jdevelop.soapwebservices.CalculateValues;
import eu.jdevelop.soapwebservices.CalculateValuesResponse;
import eu.jdevelop.soapwebservices.SOAPWebServices;
import eu.jdevelop.soapwebservices.wrapper.impl.CalculateValuesWrapper;
import javax.jws.WebService;

/**
* This is the Service-Implementation of the Web Service. Here are the
* operations which can be called from web clients.
*
* @author Siegfried Bolz
*/
@WebService(serviceName = "SOAPService", portName = "WebServices", endpointInterface = "eu.jdevelop.soapwebservices.SOAPWebServices", targetNamespace = "soapwebservices.jdevelop.eu", wsdlLocation = "WEB-INF/wsdl/ServiceImpl/webservices.wsdl")
public class ServiceImpl implements SOAPWebServices {

    public CalculateValuesResponse getCalculateValues(CalculateValues calculateValues) {

        try {
            CalculateValuesWrapper wrapper = new CalculateValuesWrapper();
            return wrapper.getResult(calculateValues);

        } catch (Exception x) {
            throw new IllegalStateException(x);
        }
    }

} // .EOF

ILogic.java
=================
package eu.jdevelop.soapwebservices.logic;

/**
* Use this interface to create logic-implementations for
* each web service operation.
*
* @author Siegfried Bolz
*/
public interface ILogic<T, V> {

    public T doAction(V var)
            throws Exception;
} // .EOF

CalculateValuesLogic.java
=================
package eu.jdevelop.soapwebservices.logic.impl;

import eu.jdevelop.soapwebservices.CalculateValues;
import eu.jdevelop.soapwebservices.CalculateValuesResponse;
import eu.jdevelop.soapwebservices.logic.ILogic;
import java.math.BigDecimal;

/**
* This implementation is normaly used for executing operations.
* Here we calculate some values.
*
* @author Siegfried Bolz
*/
public class CalculateValuesLogic implements ILogic<CalculateValuesResponse, CalculateValues>{

    public CalculateValuesResponse doAction(CalculateValues var) throws Exception {

        CalculateValuesResponse response = new CalculateValuesResponse();

        try {
            /**
             * Simple addition of two values
             */
            BigDecimal value1 = var.getValue1();
            BigDecimal value2 = var.getValue2();

            double sum = value1.doubleValue() + value2.doubleValue();

            response.setResult(BigDecimal.valueOf(sum));

        } catch (Exception x) {
            /**
             * On errors, return a valid bean with values. Do not send null!
             */
            CalculateValuesResponse errorResponse = new CalculateValuesResponse();
            errorResponse.setResult(BigDecimal.valueOf(0.0));
            errorResponse.setErrormessage("An error has occurred!");
            return errorResponse;
        }

        return response;
    }

} // .EOF

IWrapper.java
=================
package eu.jdevelop.soapwebservices.wrapper;

/**
* Use this interface to create wrapper-implementations for
* each web service operation.
*
* @author Siegfried Bolz
*/
public interface IWrapper<T, V> {

    public T getResult(V var)
            throws Exception;
} // .EOF

CalculateValuesWrapper.java
=================
package eu.jdevelop.soapwebservices.wrapper.impl;

import eu.jdevelop.soapwebservices.CalculateValues;
import eu.jdevelop.soapwebservices.CalculateValuesResponse;
import eu.jdevelop.soapwebservices.logic.impl.CalculateValuesLogic;
import eu.jdevelop.soapwebservices.wrapper.IWrapper;

/**
* The wrapper calls the logic-implementation. Exchange or modify
* the wrapper if you want to use other logic-implementations.
*
* @author Siegfried Bolz
*/
public class CalculateValuesWrapper implements IWrapper<CalculateValuesResponse, CalculateValues>{

    public CalculateValuesResponse getResult(CalculateValues var) throws Exception {
        CalculateValuesLogic logic = new CalculateValuesLogic();
        return logic.doAction(var);
    }

} // .EOF

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