Hessian是一个采用二进制格式传输的服务框架，相对传统soap web service，更轻量，更快速。官网地址：http://hessian.caucho.com/

先上个效果图，在客户端界面通过ID查询后调用后台的Hession服务获取用户数据。

工程分为三个部分，一个WEB工程，一个公共接口工程，一个客户端工程，WEB工程跟客户端工程通过Maven依赖于公共接口工程。

1.通过Maven新建一个名称为HessianInterfaces的工程,Archetype选择maven-archetype-quickstart。

其pom.xml如下：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.ken.mv</groupId>

  <artifactId>HessianInterfaces</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

  <name>HessianInterfaces</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

  </properties>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

  </dependencies>

</project>

在工程内创建一个User的实体类：

package com.ken.entity;

public class User implements java.io.Serializable {

	public User(){}

	public User(int id,String userName,String sex){

		this.id = id;

		this.userName = userName;

		this.sex = sex;

	}

	private int id;

	private String userName;

	private String sex;

	public int getId() {

		return id;

	}

	public void setId(int id) {

		this.id = id;

	}

	public String getUserName() {

		return userName;

	}

	public void setUserName(String userName) {

		this.userName = userName;

	}

	public String getSex() {

		return sex;

	}

	public void setSex(String sex) {

		this.sex = sex;

	}

}

接着在工程内创建一个接口文件：

package com.ken.service;

import com.ken.entity.User;

public interface IHessianService {

	public User getUserById(int id);  //通过id查询用户

}

至此接口工程就制作完成了。

2.建立WEB工程，其pom.xml内依赖于hessian、spring、接口工程

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

	<modelVersion>4.0.0</modelVersion>

	<groupId>com.ken.mv</groupId>

	<artifactId>KenMaven</artifactId>

	<packaging>war</packaging>

	<version>0.0.1-SNAPSHOT</version>

	<name>KenMaven Maven Webapp</name>

	<url>http://maven.apache.org</url>

	<repositories>

		<repository>

			<id>maven-net-cn</id>

			<name>aliyu-Maven</name>

			<url>http://maven.aliyun.com/nexus/content/groups/public/</url>

			<releases>

				<enabled>true</enabled>

			</releases>

			<snapshots>

				<enabled>false</enabled>

			</snapshots>

		</repository>

	</repositories>

	<dependencies>
                <!--接口工程-->

		<dependency>

			<groupId>com.ken.mv</groupId>

			<artifactId>HessianInterfaces</artifactId>

			<version>0.0.1-SNAPSHOT</version>

		</dependency>

		<dependency>

			<groupId>junit</groupId>

			<artifactId>junit</artifactId>

			<version>3.8.1</version>

			<scope>test</scope>

		</dependency>

		<dependency>

			<groupId>com.caucho</groupId>

			<artifactId>hessian</artifactId>

			<version>4.0.7</version>

		</dependency>

		<dependency>

			<groupId>org.springframework</groupId>

			<artifactId>spring-core</artifactId>

			<version>4.3.8.RELEASE</version>

		</dependency>

		<dependency>

			<groupId>org.springframework</groupId>

			<artifactId>spring-web</artifactId>

			<version>4.3.8.RELEASE</version>

		</dependency>

		<dependency>

			<groupId>org.springframework</groupId>

			<artifactId>spring-webmvc</artifactId>

			<version>4.3.8.RELEASE</version>

		</dependency>

	</dependencies>

	<build>

		<finalName>KenMaven</finalName>

	</build>

</project>

创建接口的实现类，并简单的初始化一些数据：

package com.ken.service.impl;

import com.ken.service.IHessianService;

import java.util.ArrayList;

import java.util.List;

import com.ken.entity.User;

public class HessianServiceImpl implements IHessianService {

	static List<User> list = new ArrayList<User>();

	static {

		list.add(new User(1, "Ken", "Male"));

		list.add(new User(2, "Jack", "Male"));

		list.add(new User(3, "Lucy", "Male"));

		list.add(new User(4, "Michael", "Male"));

		list.add(new User(5, "Pearl", "Female"));

	}

	public User getUserById(int id) {

		for (User u : list) {

			if (u.getId() == id) {

				return u;

			}

		}

		return null;

	}

}

在resources文件夹内添加hession-context.xml文件

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd

        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- BeanNameUrlHandlerMapping的作用是，当<bean>的name属性以/开头的时候，映射为url请求。 -->

    <!-- <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>  -->

    <bean id="hessianServiceImpl" class="com.ken.service.impl.HessianServiceImpl" />

    <!-- 使用HessianServiceExporter 将普通bean导出成Hessian服务 -->

    <bean name="/ihessian.service"

        class="org.springframework.remoting.caucho.HessianServiceExporter">

        <property name="service" ref="hessianServiceImpl" />

        <!-- Hessian服务的接口 -->

        <property name="serviceInterface" value="com.ken.service.IHessianService" />

    </bean>

</beans>

web.xml如下，用spring拦截.service结尾的hession服务：

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

         version="3.1">

	<display-name>Archetype Created Web Application</display-name>

    <!-- spring mvc-->

	<servlet>

		<servlet-name>dispatherServlet</servlet-name>

		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

		<init-param>

             <param-name>contextConfigLocation</param-name>

             <param-value>classpath:spring-context.xml</param-value>

         </init-param>

         <load-on-startup>1</load-on-startup>

	</servlet>

	<servlet-mapping>

         <servlet-name>dispatherServlet</servlet-name>

        <url-pattern>/</url-pattern>

     </servlet-mapping> 

    <!--hessian-->

	<servlet>

		<servlet-name>hessianServlet</servlet-name>

		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

		<init-param>

             <param-name>contextConfigLocation</param-name>

             <param-value>classpath:hessian-context.xml</param-value>

         </init-param>

         <load-on-startup>1</load-on-startup>

	</servlet>

	<servlet-mapping>

         <servlet-name>hessianServlet</servlet-name>

        <url-pattern>*.service</url-pattern>

     </servlet-mapping> 

</web-app>

此时在Tomcate内发布工web工程。访问hession服务,出现如下错误表示配置成功。

3.跟第一步一样创建一个普通的Maven工程。

pom.xml文件如下,也需要添加接口工程的依赖。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

	<modelVersion>4.0.0</modelVersion>

	<groupId>com.ken.mv</groupId>

	<artifactId>Client</artifactId>

	<version>0.0.1-SNAPSHOT</version>

	<packaging>jar</packaging>

	<name>Client</name>

	<url>http://maven.apache.org</url>

	<properties>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

	</properties>

	<repositories>

		<repository>

			<id>maven-net-cn</id>

			<name>aliyu-Maven</name>

			<url>http://maven.aliyun.com/nexus/content/groups/public/</url>

			<releases>

				<enabled>true</enabled>

			</releases>

			<snapshots>

				<enabled>false</enabled>

			</snapshots>

		</repository>

	</repositories>

	<dependencies>

		<dependency>

			<groupId>junit</groupId>

			<artifactId>junit</artifactId>

			<version>3.8.1</version>

			<scope>test</scope>

		</dependency>

		<dependency>

			<groupId>com.caucho</groupId>

			<artifactId>hessian</artifactId>

			<version>4.0.7</version>

		</dependency>

		<dependency>

			<groupId>com.ken.mv</groupId>

			<artifactId>HessianInterfaces</artifactId>

			<version>0.0.1-SNAPSHOT</version>

		</dependency>

		<dependency>

			<groupId>org.springframework</groupId>

			<artifactId>spring-core</artifactId>

			<version>4.3.8.RELEASE</version>

		</dependency>

		<dependency>

			<groupId>org.springframework</groupId>

			<artifactId>spring-web</artifactId>

			<version>4.3.8.RELEASE</version>

		</dependency>

		<dependency>

			<groupId>org.eclipse.swt</groupId>

			<artifactId>org.eclipse.swt.win32.win32.x86</artifactId>

			<version>4.3</version>

		</dependency>

	</dependencies>

</project>

创建hessian-client.xml文件：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd">

    <bean id="hessianService"

        class="org.springframework.remoting.caucho.HessianProxyFactoryBean">

        <property name="serviceUrl">

            <value>http://localhost:8080/WebApp/ihessian.service</value>

        </property>

        <property name="serviceInterface">

            <value>com.ken.service.IHessianService</value>

        </property>

    </bean>

</beans>

窗体（SWT绘制）实现及调用服务如下：

package com.ken.mv.Client;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.MouseEvent;

import org.eclipse.swt.events.MouseListener;

import org.eclipse.swt.layout.FormLayout;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Group;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.MessageBox;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Text;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ken.entity.User;

import com.ken.service.IHessianService;

public class App

{

    public static void main( String[] args )

    {

        Display display = new Display();

    	final Shell shell = new Shell(display,SWT.SHELL_TRIM);

    	shell.setSize(300, 300);

    	shell.setText("Hessian");

    	shell.setLayout(new FormLayout());

    	final Group group = new Group(shell,SWT.SHADOW_ETCHED_IN);

    	group.setText("用户查询");

    	final GridData gd_group = new GridData(SWT.FILL,SWT.FILL,true,true);

    	gd_group.heightHint = 100;

    	//group.setData(gd_group);

    	org.eclipse.swt.layout.GridLayout gridLayout = new org.eclipse.swt.layout.GridLayout(2, true);

		gridLayout.verticalSpacing = 5;

		gridLayout.horizontalSpacing = 5;

		gridLayout.marginLeft = 10;

		gridLayout.marginRight = 10;

		gridLayout.marginTop = 10;

		group.setLayout(gridLayout);

		final Label idLabel = new Label(group,SWT.NONE);

		final GridData gd_idLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		idLabel.setText("ID:");

		idLabel.setData(gd_idLabel);

		final Text idText = new Text(group,SWT.BORDER);

		final GridData gd_idText = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		gd_idText.widthHint = 100;

		idText.setData(gd_idText);

		final Label userNameLabel = new Label(group,SWT.NONE);

		final GridData gd_userNameLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		userNameLabel.setText("UserName:");

		userNameLabel.setData(gd_userNameLabel);

		final Text userNameText = new Text(group,SWT.BORDER);

		final GridData gd_userNameText = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		gd_userNameText.widthHint = 100;

		userNameText.setData(gd_userNameText);

		final Label sexLabel = new Label(group,SWT.NONE);

		final GridData gd_sexLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		sexLabel.setText("Sex");

		sexLabel.setData(gd_sexLabel);

		final Text sexText = new Text(group,SWT.BORDER);

		final GridData gd_sexText = new GridData(SWT.LEFT,SWT.CENTER,false,false);

		gd_sexText.widthHint = 100;

		sexText.setData(gd_sexText);

		Button searchButton = new Button(group,SWT.NONE);

		final GridData gd_searchButton = new GridData(SWT.CENTER,SWT.CENTER,false,false);

		searchButton.setData(gd_searchButton);

		searchButton.setText("Search");

		searchButton.addMouseListener(new MouseListener(){

			public void mouseDoubleClick(MouseEvent e) {

			}

			public void mouseDown(MouseEvent e) {

				//调用hessian服务，获取数据

				ApplicationContext context = new ClassPathXmlApplicationContext("hessian-client.xml");

				IHessianService service = (IHessianService)context.getBean("hessianService");

				String value = idText.getText();

				int id = Integer.parseInt(value);

				User user = service.getUserById(id);

				if(null!=user){

					userNameText.setText(user.getUserName());

					sexText.setText(user.getSex());

				} else {

					MessageBox box = new MessageBox(shell);

					box.setText("Tip");

					box.setMessage("User Not Found");

					box.open();

				}

			}

			public void mouseUp(MouseEvent e) {			

			}

		});

		shell.open();

    	while(!shell.isDisposed()){

    		if(!display.readAndDispatch()) {

    			display.sleep();

    		}

    	}

    	display.dispose();

    }

}

　　

到这里整个DEMO项目就完成了。如果输入不存在的，则提示：

源码：https://github.com/ifener/ClientHessionDemo

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