EJB模型的WEB服务

Web服务也是一种分布式技术，他与EJB最大的不同是Web服务属于行业规范，可以跨平台及语言，而EJB属于java平台的规范，尽管理论上可以跨平台，但是实现起来很复杂，javaEE为webservice提供了两种不同的编程模型，EJB容器模型和Web容器模型，下面是以JAX-WS2.x规范介绍webservice的开发

1.首先编写服务器端代码，新建一个java工程，并将JBoss的client目录下的所有jar包引入到工程

实体类Order如下

package com.lamp.bean;

import java.io.Serializable;

public class Order implements Serializable{

	private static final long serialVersionUID = 9138560163090982706L;
	private String orderId;
	private String name;
	public Order(){}
	public String getOrderId() {
		return orderId;
	}
	public void setOrderId(String orderId) {
		this.orderId = orderId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	

}

接口类OrderService

package com.lamp.service;

import java.util.List;

import com.lamp.bean.Order;

public interface OrderService {
	public Order getOrder(String orderId);
	public List<Order> getOrders();
	public String getUsername(String name);
}

实现类

package com.lamp.service.impl;

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

import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.jws.WebService;

import com.lamp.bean.Order;
import com.lamp.service.OrderService;


@WebService(targetNamespace="http://ws.lamp.com",
		name="OrderService",
		serviceName="OrderServiceBean")
@Stateless
@Remote(OrderService.class)
public class OrderServiceBean implements OrderService {

	public Order getOrder(String orderId) {
		Order order = new Order();
		order.setOrderId(orderId);
		order.setName("张三");
		return order;
	}

	public List<Order> getOrders() {
		List<Order> orders = new ArrayList<Order>();
		Order order = new Order();
		order.setOrderId("01");
		order.setName("李四");
		
		Order order2 = new Order();
		order2.setOrderId("02");
		order2.setName("王五");
		
		orders.add(order);
		orders.add(order2);
		return orders;
	}

	public String getUsername(String name) {
		return name;
	}

}

用工程打包成jar部署到JBoss的部署目录下

接着我们开发一个客户端，新建一个java工程，并在其根目录下新建一个lib文件夹，将JAX-WS的jar文件拷贝到lib文件夹，同时也将其引入到项目的构建路径中

在项目的根目录下新建一个build.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project name="WSClient" default="wsclientgen" basedir=".">
	<property name="src.dir" value="${basedir}/src"></property>
	<path id="build.classpath" description="设置类路径">
		<fileset dir="${basedir}/lib">
			<include name="*.jar"/>
		</fileset>
	</path>

	<target name="wsclientgen" description="生成webservice客户端辅助代码">
		<taskdef name="wsimport" classname="com.sun.tools.ws.ant.WsImport" classpathref="build.classpath"/>
		<wsimport wsdl="http://127.0.0.1:8080/WebService/OrderServiceBean?wsdl" sourcedestdir="${src.dir}" package="com.lamp.ws.client" keep="true"
		verbose="true" destdir="${basedir}/bin"/>
	</target>
	
</project>

通过运行ant，我们得到了客户端类

编写一个测试类来测试

package junit.test;


import java.util.List;

import org.junit.BeforeClass;
import org.junit.Test;

import com.lamp.ws.client.Order;
import com.lamp.ws.client.OrderService;
import com.lamp.ws.client.OrderServiceBean;

public class WSTest {

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}
	
	@Test
	public void getUsername(){
		OrderServiceBean service = new OrderServiceBean();
		OrderService orderService = service.getOrderServicePort();
		System.out.println(orderService.getUsername("张三"));
	}
	
	@Test
	public void getOrders(){
		OrderServiceBean service = new OrderServiceBean();
		OrderService orderService = service.getOrderServicePort();
		List<Order> orders = orderService.getOrders();
		for(Order order:orders){
			System.out.println(order.getName());
		}
	}
}

运行测试，我们能在控制台看到我们所需的结果