使用原生JAVA创建WebService(基于JDK 1.6)

本文介绍如何使用Java自带的JAX-WS实现WebService,包括接口定义、实现类编写、服务发布及客户端调用流程。同时,提供wsimport工具生成客户端代码的方法,并展示如何通过wsgen生成wsdl文件。

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在开发java WebSerivce的时候,有时候会想到XFire,AXIS.其实也可以用JAVA自带的JAX-WS也可以做到的。

比如,你可以写个简单的例子

package com.java.ws.app;


import javax.jws.WebService;

@WebService
public interface Calculator {

	public int add(int a, int b);

	public int multi(int a, int b);
}

然后实现这个接口。代码如下所示:

package com.java.ws.app;


import javax.jws.WebService;


@WebService(endpointInterface = "com.java.ws.app.Calculator", serviceName = "CaculatorSemsService", targetNamespace="http://com.test.app/")
public class CalculatorImpl implements Calculator {


	public int add(int a, int b) {
		return a + b;
	}


	public int multi(int a, int b) {
		return a * b;
	}


	public int minus(int a, int b) {
		return a - b;
	}
}


实现完这个接口以后,要开启这个WebService,  代码如下所示:

package com.java.ws.app;

import javax.xml.ws.Endpoint;

public class Server {

	public static void main(String[] args) {
		Endpoint.publish("http://localhost:8088/calculator",
				new CalculatorImpl());
	}


在浏览器中输入http://localhost:8088/calculator?wsdl,如果出现XML格式的字串,说明配置正确,截图如下所示:




接下来就可以使用客户端,就可以访问这个webService了,当然,客户端要包含接口申明。跟之前的写法保持一致。

package com.java.ws.app;

import javax.jws.WebService;

@WebService
public interface Calculator {

	public int add(int a, int b);

	public int multi(int a, int b);
}

书写客户端访问webservice的代码,如下所示:

package com.ws.app;

import java.net.MalformedURLException;
import java.net.URL;

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

import com.java.ws.app.Calculator;

public class TestClient {
	public static void main(String[] args) {
		URL url = null;
		try {
			  url = new URL("http://localhost:8087/calculator?wsdl");
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}
		QName qName = new QName("http://com.test.app/", "CaculatorSemsService");
		
		//根据targetNamespace,serverName来查找服务
		Service service = Service.create(url, qName);  
		
		Calculator port = service.getPort(Calculator.class);
		
		System.out.println("client22 :\t" + port.add(1, 2));
		
	}
}

但有时,我们觉得书写这个比较麻烦,JAVA提拱了wsimport用于生成webservice访问客户端的代码。

命令如下所示:

根据wsdl生成代码和文件
wsimport -keep http://localhost:8088/calculator?wsdl

这样就可以生成访问客户端的代码,截图如下所示:


接下来,我们只要书写几行代码,即可,如下所示:

package client;

import app.test.com.CaculatorSemsService;
import app.test.com.Calculator;

public class TestClient {

	public static void main(String[] args) {
		CaculatorSemsService service = new CaculatorSemsService();
		Calculator calculator = service.getCalculatorImplPort();
		System.out.println(calculator.add(1, 2));
	}
	
}


通过wsgen生成wsdl

如下所示:

package net.oseye;

import javax.jws.WebMethod;
import javax.jws.WebService;
 
@WebService
public class Hello {
	@WebMethod
	public String SayHello(String name){
		return String.format("Hello,%s",name);
	}
}

然后在当前项目根目录下创建bin, wsdl文件夹在命令行中输入:

wsgen -cp ./bin -r ./wsdl -s ./src ./bin -wsdl net.oseye.Hello
这样会生成一堆文件,截图如下所示:



将wsdl文件夹拷贝到tomcat webapps指定的项目目录下,即可完成和tomcat服务器的整合。

也可以通过XML配置文件,进行整合,代码如下所示:

<?xml version="1.0" encoding="UTF-8"?>
<!-- START SNIPPET: beans 2012/04/11 by yeyuelong -->
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jaxws="http://cxf.apache.org/jaxws"
    xmlns="http://www.springframework.org/schema/beans"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd" >

    <!-- Import Apache CXF Bean Definition -->

    <import resource="classpath:META-INF/cxf/cxf.xml" />

    <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />

    <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />

    <!-- implementor :接口类的实现类 address: 要和注释里面神秘的服务名对应, -->

    <jaxws:endpoint
        id="semsWebservice"
        address="/SemsService"
        implementor="cn.ac.iscas.gz.sems.web.webservice.internal.SemsWebserviceImpl" />

    <jaxws:endpoint
        id="semsCommandsWebservice"
        address="/SemsCommandsService"
        implementor="cn.ac.iscas.gz.sems.web.webservice.internal.SemsCommandsWebserviceImpl" />

</beans>

记得要引入CXF框架

	<dependency>
			<groupId>org.apache.cxf</groupId>
			<artifactId>cxf</artifactId>
			<version>2.4.6</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>

		<dependency>
			<groupId>org.apache.geronimo.specs</groupId>
			<artifactId>geronimo-activation_1.1_spec</artifactId>
			<version>1.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.geronimo.specs</groupId>
			<artifactId>geronimo-annotation_1.0_spec</artifactId>
			<version>1.1.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.geronimo.specs</groupId>
			<artifactId>geronimo-javamail_1.4_spec</artifactId>
			<version>1.7.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.geronimo.specs</groupId>
			<artifactId>geronimo-ws-metadata_2.0_spec</artifactId>
			<version>1.1.3</version>
		</dependency>
		<dependency>
			<groupId>org.apache.neethi</groupId>
			<artifactId>neethi</artifactId>
			<version>3.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.mortbay.jetty</groupId>
			<artifactId>jetty-util</artifactId>
			<version>6.1.26</version>
		</dependency>
<!-- 		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-asm</artifactId>
			<version>3.1.0.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>3.1.0.RELEASE</version>
		</dependency> -->
		<dependency>
			<groupId>org.codehaus.woodstox</groupId>
			<artifactId>stax2-api</artifactId>
			<version>3.1.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.ws.xmlschema</groupId>
			<artifactId>xmlschema-core</artifactId>
			<version>2.0.1</version>
		</dependency>
		<dependency>
			<groupId>net.sf.morph</groupId>
			<artifactId>morph</artifactId>
			<version>1.1.1</version>
		</dependency>


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