Hessian是一个轻量级的remoting onhttp工具，使用简单的方法提供了RMI的功能。 相比WebService，Hessian更简单、快捷。采用的是二进制RPC协议，因为采用的是二进制协议，所以它很适合于发送二进制数据

以下给出demo代码

服务端代码：

配置jar：

<!-- hessian 轻量级的remoting onhttp工具，使用简单的方法提供了RMI的功能。 相比WebService，Hessian更简单、快捷，采用的是二进制RPC协议 -->
<hessian.version>4.0.51</hessian.version>

<!-- hessian jar 包添加 start -->
<dependency>
    <groupId>com.caucho</groupId>
    <artifactId>hessian</artifactId>
    <version>${hessian.version}</version>
</dependency>
<!-- hessian jar 包添加 end -->

<!-- hessian demo start -->
<servlet>
	<servlet-name>hello</servlet-name>
	<servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>
	<init-param>
		<param-name>service-class</param-name>
		<param-value>com.noteshare.dataInteraction.hessian.services.impl.BasicServiceImpl</param-value>
	</init-param>
</servlet>
<servlet-mapping>
	<servlet-name>hello</servlet-name>
	<url-pattern>/hello</url-pattern>
</servlet-mapping>
<!-- hessian demo end -->

package com.noteshare.dataInteraction.hessian.entity;

import java.io.Serializable;

public class User implements Serializable{
	private static final long serialVersionUID = 2368176842478981632L;
	String userName = "snoopy";
	String password = "showme";

	public User(String user, String pwd) {
		this.userName = user;
		this.password = pwd;
	}

	public String getUserName() {
		return userName;
	}

	public String getPassword() {
		return password;
	}
}

接口定义

package com.noteshare.dataInteraction.hessian.services;

import com.noteshare.dataInteraction.hessian.entity.User;

public interface BasicService {
	public void setGreeting(String greeting);

	public String hello();

	public User getUser();
}

接口实现

package com.noteshare.dataInteraction.hessian.services.impl;

import com.noteshare.dataInteraction.hessian.entity.User;
import com.noteshare.dataInteraction.hessian.services.BasicService;

public class BasicServiceImpl implements BasicService {
	private String _greeting = "Hello, world";

	public void setGreeting(String greeting) {
		_greeting = greeting;
		System.out.println("set greeting success:" + _greeting);
	}

	public String hello() {
		return _greeting;
	}

	public User getUser() {
		return new User("prance", "meshow");
	}
}

以上是服务端代码，启动tomcat接口即发布成功

客户端代码

package com.noteshare.dataInteraction.hessian.services;

import com.noteshare.dataInteraction.hessian.entity.User;

public interface BasicService {
	public void setGreeting(String greeting);

	public String hello();

	public User getUser();
}

package com.noteshare.dataInteraction.hessian.client;

import com.caucho.hessian.client.HessianProxyFactory;
import com.noteshare.dataInteraction.hessian.services.BasicService;

public class BasicClient {
	public static void main(String[] args) throws Exception {
		String url ="http://127.0.0.1:8080/test/hello";
		HessianProxyFactory factory = new HessianProxyFactory();
		BasicService basic = (BasicService) factory.create(BasicService.class, url);
		System.out.println("Hello:" + basic.hello());
		System.out.println("Hello:" + basic.getUser().getUserName());
		System.out.println("Hello:" + basic.getUser().getPassword());
		basic.setGreeting("HelloGreeting");
		System.out.println("Hello:" + basic.hello());
	}
}

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