webservices学习之hession

学习了以下Hession使用，下面说明一下如何使用(网上有先人弄过例子的),这里仅仅个人学习交流使用

1.需要JAR
  hessian-3.2.1.jar(JAVA 版本的)
2.代码
  服务端接口
  IBasic.java

 package hessian;

import java.util.List;
import java.util.Map;

/***********************************************************************   
 *   
 *   IBasic.java     
 *   @copyright       Copyright:   2009-2012     
 *   @creator         周辉<br/>   
 *   @create-time   May 21, 2009   3:38:06 PM   
 *   @revision         $Id:     *   
 ***********************************************************************/
public interface IBasic {
	 /**   
     * 测试字符串   
     * @return   
     */   
    public String hello();    
   
    /**   
     * 取一辆汽车   测试对象传递   
     * @return   
     */   
    public Car getCar();    
    /**
     *   取得list 数据
     * @return
     */
    public List<String> getList();
    
    /**
     * 取得map 数据
     * @return
     */
    public Map<String,String> getMap();
    
    /**
     *  保存数据
     * @param map
     */
    public void setMap(Map<String,Car> map);

}

服务端实现类代码 BasicService.java

package hessian;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/*******************************************************************************
 * 
 * BasicService.java
 * 
 * @copyright Copyright: 2009-2012
 * @creator 周辉<br/>
 * @create-time May 21, 2009 3:39:21 PM
 * @revision $Id: *
 ******************************************************************************/
public class BasicService implements IBasic {
	/**
	 * 取一辆汽车 测试对象传递
	 * 
	 * @return
	 */
	public Car getCar() {
		Car car = new Car();
		car.setColor("RED红色");
		car.setLength("2400");
		car.setName("HAHACHE");
		return car;
	}

	/**
	 * 测试字符串
	 * 
	 * @return
	 */
	public String hello() {
		return "hello zhouhui";
	}

	/**
	 * 取得list 数据
	 * 
	 * @return
	 */
	public List<String> getList() {
		List<String> list = new ArrayList<String>();
		list.add("1");
		list.add("2");
		list.add("3");
		return list;
	}

	/**
	 * 取得map 数据
	 * 
	 * @return
	 */
	public Map<String, String> getMap() {
		Map<String, String> map = new HashMap<String, String>();
		if (map.isEmpty()) {
			map.put("1", "zhouhui1");
			map.put("2", "zhouhui2");
			map.put("3", "zhouhui3");
		}
		return map;
	}

	/**
	 * 保存数据
	 * 
	 * @param map
	 */
	public void setMap(Map<String, Car> map) {
		for (Map.Entry<String, Car> item : map.entrySet()) {
			System.out.println("mapkey: " + item.getKey());
			System.out.println("mapvalue: " + item.getValue().getColor());
			System.out.println("mapvalue: " + item.getValue().getName());
		}
	}

}

一个封装的JAVABEAN
Car.java

package hessian;
import java.io.Serializable;
/***********************************************************************   
 *   
 *   Car.java     
 *   @copyright       Copyright:   2009-2012     
 *   @creator         周辉<br/>   
 *   @create-time   May 21, 2009   3:38:21 PM   
 *   @revision         $Id:     *   
 ***********************************************************************/
public class Car implements Serializable {
	private String color;
	private String length;
	private String name;
	public String getColor() {
		return color;
	}
	public void setColor(String color) {
		this.color = color;
	}
	public String getLength() {
		return length;
	}
	public void setLength(String length) {
		this.length = length;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

配置WEB.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
	xmlns="http://java.sun.com/xml/ns/j2ee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <servlet>   
    <servlet-name>HessianServlet</servlet-name>   
    <servlet-class>   
        com.caucho.hessian.server.HessianServlet   
    </servlet-class>   
    <init-param>   
        <param-name>home-class</param-name>   
        <param-value>hessian.BasicService</param-value>   
    </init-param>   
    <init-param>   
        <param-name>home-api</param-name>   
        <param-value>hessian.IBasic</param-value>   
    </init-param>
    </servlet>  
    <servlet-mapping>   
    <servlet-name>HessianServlet</servlet-name>   
    <url-pattern>/hessianServlet</url-pattern>   
	</servlet-mapping>  
</web-app>

最后客户端调用的代码
testClient.java

package hessian;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.caucho.hessian.client.HessianProxyFactory;

/***********************************************************************   
 *   
 *   testClient.java     
 *   @copyright       Copyright:   2009-2012     
 *   @creator         周辉<br/>   
 *   @create-time   May 21, 2009   3:44:45 PM   
 *   @revision         $Id:     *   
 ***********************************************************************/
public class testClient {

	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		// TODO Auto-generated method stub
		String url = "http://127.0.0.1:8081/testHession/hessianServlet";    
        HessianProxyFactory factory = new HessianProxyFactory();    
        IBasic basic = (IBasic) factory.create(IBasic.class, url);    
          Car car   = basic.getCar(); 
       // 客户端调用服务端list 数据
        List<String> list =basic.getList();
        for (String s :list){
        	 System.out.println("list: " + s);    
        }
        System.out.println("Hello: " + basic.hello());    
        System.out.println("Hello: " + car.getName()); 
        // 客户端调用服务端MAP 数据
        Map<String,String> map =basic.getMap();
        for(Map.Entry<String,String> item:map.entrySet()){
        	System.out.println("mapkey: " +item.getKey()); 
        	System.out.println("mapvalue: " +item.getValue());    
        }
        // 客户端向服务端发送数据
        Map<String,Car> map2 = new HashMap<String,Car>();
        if(map2.isEmpty()){
        	Car c = new Car();
        	c.setColor("red");
        	c.setLength("111");
        	c.setName("zhouhui");
        	map2.put("1", c);
        	map2.put("2", c);
        	map2.put("3", c);
        }
        basic.setMap(map2);
	}
}

最后启动TOMCAT,发布好服务后,启动testClient.java 调用服务代码
客户端控制台打出调用服务的输出结果
在从TOMCAT 服务控制台查看客户端口输入数据
好了一切OK 了

注意点：
自定义JAVABEAN 一定要序列化implements Serializable
否则会报错
Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: http://127.0.0.1:8081/testHession/hessianServlet
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1296)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1290)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:944)
at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:184)